Patients with a pheochromocytoma may experience symptoms such as hypertension (high blood pressure), palpitations (rapid heartbeat), sweating, headache, anxiety, and tremors due to the excessive release of adrenaline and noradrenaline from the adrenal medulla.
The adrenal medulla is responsible for producing and releasing adrenaline (epinephrine) and noradrenaline (norepinephrine), which are hormones involved in the body's stress response. A pheochromocytoma is a tumor that develops in the medulla of the adrenal gland, causing it to produce excessive amounts of these hormones. As a result, patients with this tumor may experience symptoms related to increased levels of adrenaline and noradrenaline.
The excess release of these hormones can lead to persistent hypertension, which can be severe and difficult to control. Patients may also experience palpitations or a rapid heartbeat due to the stimulating effects of adrenaline on the heart. Sweating, headache, anxiety, and tremors are common symptoms associated with increased sympathetic activity caused by excessive hormone release.
It's important to note that symptoms can vary in severity and may occur episodically, depending on the tumor's activity. Proper diagnosis and management of pheochromocytoma involve medical evaluation, imaging studies, and surgical removal of the tumor to alleviate symptoms and prevent complications related to hypertension and hormone imbalances.
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Explain how insulin prevents degradation of muscle proteins
describe how blood glucose is maintained after the body's glycogen has been depleted. Your description should include all the
ormones involved.
Insulin helps to preserve muscle protein. During periods of fasting or exercise, protein degradation is stimulated, resulting in muscle loss.
The insulin hormone, on the other hand, has an anabolic effect, reducing protein degradation and aiding in muscle preservation.Blood glucose is maintained in the body after glycogen depletion by the hormones glucagon and cortisol. The liver converts glycogen into glucose, which is then released into the bloodstream to maintain blood glucose levels.
If blood glucose levels fall below normal levels, glucagon is secreted, causing the liver to break down glycogen into glucose and release it into the bloodstream. cortisol also promotes gluconeogenesis, which is the production of glucose from non-carbohydrate sources such as amino acids and fats, in addition to promoting glycogen breakdown and glucose release by the liver. As a result, blood glucose levels are maintained within the normal range.
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What flaw in florence nightengale's reasoning regarding the air test might explain why miasma as often considered correct?
The flaw in Florence Nightingale's reasoning regarding the air test is that she did not have an understanding of germ theory, which led to miasma being considered correct.
Florence Nightingale, a British nurse, was a strong advocate of the idea that the quality of air played an important role in people's health and the spread of diseases. She suggested that by improving air quality, the spread of diseases would be reduced and this would be achieved by conducting the air test, which involves opening a window to improve ventilation. However, Nightingale was not familiar with germ theory, which explains that diseases are caused by microorganisms, and that improving air quality alone is not enough to prevent the spread of diseases.
Miasma theory, on the other hand, proposed that diseases were caused by bad odors or miasma that came from decaying organic matter. This theory was widely accepted at the time because it was observable that foul-smelling places were often associated with illness. The flaw in Nightingale's reasoning regarding the air test is that she did not have an understanding of germ theory, which led to miasma being considered correct.
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1. Blood that is flowing back to the heart is known as blood a. Venous b. Plasma c. Lymph d. Arterial 2. Fluid found around the heart is called a. Amniotic b. Pericardium c. Lymph d. Transcellular 3
Fluid found in the spaces between cells is called transcellular fluid. Explanation: Transcellular fluid is a type of extracellular fluid that is found in the spaces between cells. It includes fluids such as cerebrospinal fluid, synovial fluid, and aqueous humor, which are all important for various bodily functions.
1. Blood that is flowing back to the heart is known as venous blood. Explanation: Blood in the circulatory system is categorized into two main types: arterial blood and venous blood. Arterial blood is oxygen-rich blood that is pumped out of the heart and into the arteries to deliver oxygen and nutrients to the body's tissues. Venous blood is oxygen-poor blood that is pumped back to the heart and then to the lungs, where it picks up oxygen and releases carbon dioxide.2. Fluid found around the heart is called pericardium. Explanation: The pericardium is a sac that surrounds the heart and is filled with a small amount of fluid called pericardial fluid. This fluid helps to lubricate the surface of the heart and reduce friction as it beats.3. Fluid found in the spaces between cells is called transcellular fluid. Explanation: Transcellular fluid is a type of extracellular fluid that is found in the spaces between cells. It includes fluids such as cerebrospinal fluid, synovial fluid, and aqueous humor, which are all important for various bodily functions.
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Match the key fundamental concept of biology and human anatomy and physiology with its correct example. A. The positive feedback mechanisms of childbirth increase and intensify as the process of childbirth continues. The positive feedback mechanisms do not subside until the process of childbirth ends. B. The folds and villi of the small intestinal tract wall allow for increased absorption of nutrients and secretion of fluids and enzymes C. A hormone binds to its receptor on a cell and signals for that cell to change what it is doing; e.g. thyroid hormone binding to a muscle cell and increasing the metabolism of the muscle cell to increase the metabolic output of the muscle tissue. D. A drop in blood pressure results in an increase in water content in the blood stream to maintain normal blood volume and pressure E. The integumentary system holds the body together
E. Comparmetalization B. Surface area A. Homeostasis D. Amplification C. Signal transduction
The correct fundamental concept of biology and human anatomy and physiology is matched with its correct example:
A. Homeostasis - A drop in blood pressure results in an increase in water content in the bloodstream to maintain normal blood volume and pressure.
B. Surface area - The folds and villi of the small intestinal tract wall allow for increased absorption of nutrients and secretion of fluids and enzymes.
C. Signal transduction - A hormone binds to its receptor on a cell and signals for that cell to change what it is doing; e.g. thyroid hormone binding to a muscle cell and increasing the metabolism of the muscle cell to increase the metabolic output of the muscle tissue.
D. Amplification - The positive feedback mechanisms of childbirth increase and intensify as the process of childbirth continues. The positive feedback mechanisms do not subside until the process of childbirth ends.
E. Comparmentalization - The integumentary system holds the body together.
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6) What are the four major tissues that make up the body? Discuss how each of those tissues are represented within the skin? 7) How does structure relate to function in the skin (answer to previous question should help you answer this question)?
The four major types of tissues that make up the human body are:
1. Epithelial tissue.2. Connective tissue.3. Muscle tissue.4. Nervous tissue. Each of these tissues is represented in the skin. Here's how each tissue is represented in the skin: Epithelial Tissue: The outermost layer of skin is made up of epithelial tissue.
This tissue provides a barrier against external influences, such as pathogens, UV radiation, and chemicals.Connective Tissue: The dermis, the layer beneath the epithelium, is made up of connective tissue. This tissue provides support and strength to the skin, as well as flexibility and elasticity.Muscle Tissue: Muscle tissue is present in the skin as arrector pili muscles. These muscles are attached to hair follicles and are responsible for the phenomenon known as "goosebumps."Nervous Tissue: The skin contains sensory receptors that respond to different types of stimuli, such as pressure, temperature, and pain.
These receptors are made up of nervous tissue.In the skin, structure and function are closely related. The various layers of the skin are arranged in a specific way that allows them to perform their functions effectively. For example, the outer layer of skin is made up of dead skin cells that provide a protective barrier against pathogens and UV radiation. The underlying layers of skin contain blood vessels, nerve endings, and other structures that allow for sensation, healing, and temperature regulation.The skin is also well adapted to its function of regulating body temperature. The sweat glands in the skin help to cool the body through the process of evaporation. The arrangement of blood vessels in the skin helps to regulate blood flow to the skin, allowing for heat dissipation when necessary.
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If you could artificially modify the membrane resting potential from -70 mV to +70 mV, what will the sodium ions (Na+) net movement be?
A. Na+ will enter the cell without modifying the voltage.
B. Na+ will enter the cell following its concentration gradient.
C. Na+ will exit the cell even against the concentration gradient.
D. Na+ will not move from the compartments.
What will happen to the resting membrane potential if more K+ (potassium) channels are opened?
A. The resting membrane potential will move closer to zero (depolarize).
B. The resting membrane potential will stay close to +20 mV.
C. The resting membrane potential will stay around -60 mV.
D. The resting membrane potential will hyperpolarize.
Of the following graded potentials, which one is produced by efflux of potassium?
A. end-plate potential.
B. excitatory postsynaptic potential (EPSP).
C. inhibitory postsynaptic potential (IPSP).
D. organ of Corti receptor potential.
What type of receptor is responsible for the generation of a local potential at the organ of Corti?
A. it is a TRP1 receptor (transitory receptor potential).
B. it is an ionotropic receptor.
C. it is a MET receptor (mechanoelectrical transducer).
D. it is a proprioceptor similar to the muscle spindle.
What do drugs of addiction and natural behaviors share?
A. drugs of addiction increase serotonin while natural behaviors increase dopamine in the nucleus accumbens.
B. they all increase acetylcholine in the striatum.
C. Drugs of addiction and natural behaviors have opposite effects in dopamine release.
D. they all increase dopamine in the nucleus accumbens.
Regarding environmental influences on weight
A. the influence of infection has been disproven.
B. social influence is mostly from the family.
C. smoking increases appetite.
D. sleep loss increases appetite.
If you could artificially modify the membrane resting potential from -70 mV to +70 mV, the sodium ions (Na+) net movement will be Na+ will enter the cell following its concentration gradient.
The resting membrane potential will hyperpolarize is what will happen to the resting membrane potential if more K+ (potassium) channels are opened.
At synapses, potassium ions efflux from the cell leads to hyperpolarization or inhibitory postsynaptic potential. The efflux of positively charged potassium ions leads to more negative potential which makes it difficult for positively charged ions to enter the cell.
It is a MET receptor (mechanoelectrical transducer) that is responsible for the generation of a local potential at the organ of Corti.
They all increase dopamine in the nucleus accumbens is
Regarding environmental influences on weight Sleep loss increases appetite. is the correct option.
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Later in the day Sam looks at the data from their heart rate monitor and notices that their heart
rate increased during the time that they sat down to recover from their dizzy spell.
Explain in detail the cause of Sam's increase in heart rate during this time and how this works to restore Sam's blood pressure back to normal?
Sam's increase in heart rate during their recovery from a dizzy spell is caused by the body's natural response to maintain blood pressure.
During a dizzy spell, Sam's blood pressure likely dropped, leading to reduced blood flow and oxygen supply to the brain. As a compensatory mechanism, the body initiates an increase in heart rate to restore blood pressure back to normal. When Sam sat down to recover, the body recognized the need for increased blood flow and oxygen delivery to the brain and other vital organs. This prompted the heart to pump blood at a faster rate.
The increase in heart rate serves as a means to compensate for the low blood pressure by increasing cardiac output. Cardiac output is the amount of blood pumped by the heart in a minute, and it is calculated by multiplying heart rate with stroke volume (the amount of blood pumped with each heartbeat). By increasing the heart rate, more blood is pumped per minute, effectively improving blood flow and enhancing oxygen and nutrient delivery throughout the body.
The body's autonomic nervous system plays a crucial role in regulating heart rate. The sympathetic nervous system, often referred to as the "fight-or-flight" response, releases stress hormones like adrenaline, which stimulates the heart to beat faster. This response is triggered to ensure adequate blood supply during periods of stress or physical exertion.
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Which pathway processes stimuli from the stomach, such as the degree of stretch in the stomach wall?
The vagus nerve is activated, it helps to reduce stress and anxiety levels, lowers the heart rate, and increases digestion.
The pathway that processes stimuli from the stomach, such as the degree of stretch in the stomach wall is called the vagus nerve.
The vagus nerve is the longest cranial nerve in the human body that is responsible for transmitting a lot of information from the gastrointestinal tract to the central nervous system.
The vagus nerve is part of the autonomic nervous system, which is responsible for controlling unconscious bodily functions such as digestion, heart rate, and breathing.
It is known as the tenth cranial nerve because it is the longest of all the cranial nerves that start in the brain.
The vagus nerve originates in the brainstem and travels down through the neck and thorax to the abdomen and is responsible for transmitting sensory information from the gastrointestinal tract.
The vagus nerve is an essential component of the parasympathetic nervous system, which is responsible for the body's rest-and-digest response.
When the vagus nerve is activated, it helps to reduce stress and anxiety levels, lowers the heart rate, and increases digestion.
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Question B1 Define the following mechanisms by stating whether it is an active or a passive mechanism, direction of movement, any energy requirement and specific type of the molecule if applicable. (a) Osmosis (b) Exocytosis (c) Filtration
Osmosis, exocytosis, and filtration are different mechanisms that are used in the movement of molecules and particles in biological systems. These mechanisms can be classified as either active or passive. Let's discuss each of them below.
Osmosis: Osmosis is the movement of solvent molecules (usually water) through a selectively permeable membrane from a region of higher concentration to a region of lower concentration. This process does not require energy and is, therefore, a passive mechanism. The direction of movement is from a region of higher solvent concentration to a region of lower solvent concentration.Exocytosis:Exocytosis is a type of active transport mechanism in which materials are exported out of a cell by the fusion of vesicles with the plasma membrane. This process requires energy in the form of ATP and is therefore considered an active mechanism. It is involved in the secretion of hormones, neurotransmitters, and other molecules by cells.Filtration: Filtration is the movement of fluid and small molecules through a selectively permeable membrane under the influence of hydrostatic pressure.To learn more about Osmosis visit here:
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This type of membrane lines true cavities which are not connected to the outside of the body
A. Synovial membranes
B. Mucous membranes
C. Dialysis membranes
D. Cutaneous membranes
E. Serous Membranes
The type of membrane that lines true cavities which are not connected to the outside of the body are known as serous membranes. Option (E) is the correct option.
What are serous membranes?
Serous membranes are delicate membranes that surround organs and line body cavities. They generate a thin layer of fluid that reduces friction as organs move within the cavities. These membranes cover the thoracic and abdominal cavity's surfaces and organs, reducing friction from muscle movement and cushioning against organ injury.What are the other types of membranes?
Mucous membranes: Mucous membranes line body cavities exposed to the environment (e.g., digestive, respiratory, urinary tracts) and produce mucus. Mucus is a sticky substance that helps protect the body from microorganisms and lubricates the passage of food and waste products through the digestive system.Cutaneous membrane: The skin or cutaneous membrane is the body's largest and most visible membrane. It protects the body's internal organs and tissues from the environment and keeps water and nutrients in.Dialysis membranes: Dialysis membranes are thin films of semi-permeable material with uniform pores that are used to filter blood during hemodialysis.Synovial membranes: Synovial membranes line the synovial joint cavities, which are spaces between bones that allow for joint movement. The synovial fluid they produce lubricates the joint and reduces friction between the bones.Learn more about membranes:
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Compare and contrast the 3 types of blood vessels: arteries, veins, and capillaries. Include characteristics such as size, thickness, pressure, blood velocity, and cross-sectional area
The human circulatory system comprises three types of blood vessels, namely arteries, veins, and capillaries. Arteries have thick walls and high blood pressure, veins have thin walls and low blood pressure, and capillaries are extremely thin and responsible for the exchange of gases, nutrients, and waste products.
Below is a detailed comparison and contrast of the three blood vessel types.
Size Arteries are the largest vessels that transport blood from the heart to the body’s various organs and tissues.
Capillaries are the smallest, with a diameter of roughly 8 micrometers. Veins are intermediate in size.
Thickness Arteries have a thick muscular wall, which makes them elastic, while veins have thinner walls and less muscular tissue. Capillaries, on the other hand, are incredibly thin.
Pressure Arteries have high blood pressure, which is due to their thick walls.
They help keep blood moving through the circulatory system by contracting and dilating. Veins have low blood pressure but rely on a series of one-way valves that help move blood against gravity.
Capillaries have low blood pressure but are responsible for the majority of the exchange of oxygen, nutrients, and waste products.Blood VelocityArteries have the highest blood velocity, and blood flow is unidirectional.
Veins have a lower velocity, and blood flow is bidirectional. Capillaries have the slowest velocity.Cross-sectional area
Arteries have a smaller cross-sectional area than veins, while capillaries have the largest cross-sectional area compared to the two other vessel types.
This enables them to carry out the vital exchange of gases and nutrients with surrounding cells.
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The central nervous system can produce the change in skeletal muscle force shown in the graph by altering which of the following? A) Discharge rate of motoneurons Force B) Discharge rate of sympathetic neurons innervating the muscle vasculature C) Duration of twitch force of each active motor unit D) Number of active Renshaw cells E) Rate of twitch force development of each active motor unit
The central nervous system can produce the change in skeletal muscle force by altering the Discharge rate of motoneurons force (Option A).
A muscle twitch is defined as a single cycle of contraction-relaxation in response to a stimulus. The stimulus that causes muscle contraction is an electrical impulse sent down a nerve cell, which then induces the muscle cell membrane to change its electrical charge, eventually leading to muscle contraction.
An increase in the discharge rate of motoneurons would cause an increase in the force of the twitch because more action potentials would be conducted on the muscle cells, resulting in greater muscle contraction. This indicates that the central nervous system can produce the change in skeletal muscle force by altering the Discharge rate of motoneurons force. Therefore, option A is the correct answer.
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Lungs would not be able to inflate properly in this type of disorder a. Pulmonary respiration b. Obstructive c. Restrictive d. Cellular respiration
The disorder in which the lungs would not be able to inflate properly is called c. restrictive disorder. Restrictive disorder is a lung disease that affects lung expansion and causes difficulty inhaling. It is defined as a decrease in lung volume due to the inability of the lung tissue to expand during inhalation.
Lungs would not be able to inflate properly in the case of restrictive disorder. Restrictive lung diseases are a category of lung diseases that cause a decrease in lung volume, making it difficult to breathe. There are several types of restrictive lung diseases, each with its own cause.
The following are some of the symptoms of restrictive lung disease:
Breathlessness or shortness of breath
Tightness in the chest
Cough that may or may not be accompanied by phlegm
Fatigue
Dizziness
During inspiration, the lungs are unable to expand properly in restrictive lung disease, resulting in limited lung function. As a result, gas exchange becomes compromised, causing oxygen and carbon dioxide levels to fluctuate outside of normal ranges.
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A female patient exhibits a forced expiratory volume in 1 second (FEV) that is 2700 ml. Her FVC = 4500ml. Does this woman exhibit normal respiratory system health? If not, what led you to that conclusion? (1 pt)
The Forced Expiratory Volume in 1 second (FEV1) is a measure of the volume of air forcefully exhaled in the first second of a forced exhalation after a maximal inhalation. In this case, the FEV1 is given as 2700 ml.
The Forced Vital Capacity (FVC) is a measure of the maximum volume of air a person can forcefully exhale after a maximal inhalation. Here, the FVC is given as 4500 ml.
To assess respiratory system health, the FEV1 needs to be compared to the predicted or expected FEV1 for the individual based on factors such as age, gender, height, and ethnicity. The ratio of FEV1 to FVC, expressed as a percentage, is also considered. Without knowledge of the predicted values or the FEV1/FVC ratio, it is not possible to determine if the patient exhibits normal respiratory system health.
Further evaluation by a healthcare professional, including spirometry testing and interpretation, is necessary to assess the patient's respiratory health accurately.
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what is the role of calcium in the skeletal system? please put a
detailed answer
Calcium plays an essential role in the skeletal system. Calcium is the mineral that makes bones and teeth strong. About 99% of the body's calcium is found in bones and teeth.
The remaining 1% of calcium is found in the bloodstream. Calcium in the bloodstream helps the body function, like allowing muscles to move and nerves to carry messages.
Therefore, the role of calcium in the skeletal system is as follows:Calcium helps in the growth and development of bones. Children need more calcium than adults because their bones are still growing.Calcium is required for maintaining strong bones and teeth.
Calcium is necessary for maintaining bone density. Calcium helps to prevent bone loss as we age.Calcium helps muscles contract and relax, and it helps blood vessels to expand and contract properly. Calcium also plays a role in the release of hormones and enzymes that regulate digestion and metabolism.Calcium is necessary for blood clotting.
If there is not enough calcium in the body, bleeding problems can occur.Bone is a living tissue, and it is continuously breaking down and rebuilding. Bones need calcium and other minerals to rebuild and stay strong.
Therefore, adequate calcium intake is essential for optimal skeletal system health.
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The soft palate is quite rigid and stays in one position at all
times.
true or false
The statement "The soft palate is quite rigid and stays in one position at all times" is FALSE.
The soft palate is located in the back of the roof of the mouth, just above the tongue. The soft palate is made up of muscle and connective tissue, and it is covered by a thin, moist membrane that produces mucus.
The soft palate serves a vital role in swallowing, breathing, and speech. The given statement is false because the soft palate is not rigid but soft and flexible. The soft palate, also known as the velum, can move and change its position based on the actions being performed by an individual.
For instance, during speech, the soft palate can move to create different speech sounds. When you swallow, the soft palate helps to prevent food and drink from entering the nasal cavity.
Similarly, while breathing, the soft palate moves to close off the nasal passages to ensure that air passes through the mouth. Therefore, the statement "The soft palate is quite rigid and stays in one position at all times" is FALSE.
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17. As Olympics contender Martina sat lazily scanning the newspaper, a headline caught her eye, "Anabolic steroids declared a controlled substance." Hmm, she thought, that's interesting... it's about time those drugs got put in the same class with heroin. That night, she awoke from a dream in a cold sweat. In her dream all her male friends were being rounded up by government drug agents and charged with illegal possession of a controlled substance. What is the connection, if any, between the headline and Martina's bizarre dream?
The connection, if any, between the headline and Martina's bizarre dream is that Martina might have been using anabolic steroids as performance-enhancing drugs in the past or present. Anabolic steroids are synthetic substances that mimic testosterone in the body, which is the primary hormone responsible for male characteristics.
They are used to promote the growth of muscle tissue and to improve endurance and strength. They have been classified as a controlled substance due to their potential for abuse and negative health effects. The fact that Martina's dream involved her male friends being charged with illegal possession of a controlled substance suggests that she may have some guilt or fear of being caught for using steroids.
This could be a subconscious manifestation of her anxiety about the recent news that anabolic steroids have been declared a controlled substance, as she realizes the potential consequences of using them. Therefore, it can be concluded that Martina's dream was an indication of her fears and anxieties about getting caught for illegal possession of a controlled substance.
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After _____________hours of oxygen-rich environment, enough toxic
free radicals molecules accumulate to clinically see evidence of
cellular damage
After 48 hours of oxygen-rich environment, enough toxic free radicals molecules accumulate to clinically see evidence of cellular damage.
Free radicals are toxic byproducts of oxygen metabolism that can cause significant damage to living organisms. They are produced when the body breaks down food or when it is exposed to radiation, tobacco smoke, or other environmental toxins.Oxygen is essential for our bodies to function properly, but in an oxygen-rich environment, the body can accumulate high levels of free radicals, which can cause cellular damage. In as little as 48 hours of exposure to an oxygen-rich environment, enough toxic free radical molecules can accumulate to cause clinically visible evidence of cellular damage.
Oxygen-rich environments are often found in intensive care units, where patients are often placed on oxygen therapy to help them breathe. However, prolonged exposure to high levels of oxygen can lead to the formation of free radicals and other harmful substances that can damage cells and tissues.In summary, after 48 hours of exposure to an oxygen-rich environment, enough toxic free radicals molecules can accumulate to clinically see evidence of cellular damage.
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The process of DNA transcription uses one nucleic acid (DNA) as the template for creating another nucleic acid (RNA). Since DNA and RNA are both nucleic acids, each is made up of a combination of common and unique components. Match each term to the appropriate structure(s) on the diagram of DNA and RNA. Some terms will be used more than once. DNA RNA Pyrin guanine Answer Bank adenie thymine guanine ribose deoxyribose cytosinc phosphate group TEC "The process of DNA transcription uses one nucleic acid (DNA) as the template for creating another nucleic acid (RNA). Since DNA and RNA are both nucleic acids, each is made up of a combination of common and unique components. Match each term to the appropriate structure(s) on the diagram of DNA and RNA. Some terms will be used more than once. DNA RNA P: Pyrin guanine Answer Bank uracil adenie adening thymine cytosine thymine guanine ribose deoxyribose phosphato group
The appropriate structure(s) on the diagram of DNA and RNA can be matched to the following terms:
DNA: deoxyribose, phosphate group, adenine, thymine, guanineRNA: ribose, phosphate group, adenine, uracil, guanineThe genetic code is frequently referred to as a "blueprint" because it contains the instructions a cell requires in order to sustain itself. We now know that there is more to these instructions than simply the sequence of letters in the nucleotide code, however. For example, vast amounts of evidence demonstrate that this code is the basis for the production of various molecules, including RNA and protein. Research has also shown that the instructions stored within DNA are "read" in two steps: transcription and translation. In transcription, a portion of the double-stranded DNA template gives rise to a single-stranded RNA molecule.
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Hypertonicity within an agonist decreases the neural drive to the antagonist or opposing muscle, thereby weakening that said (opposing) muscle which then relies upon a synergistic muscle to help generate adequate force at that body segment.
T/F
The statement Hypertonicity within an agonist decreases the neural drive to the antagonist or opposing muscle, thereby weakening that said (opposing) muscle which then relies upon a synergistic muscle to help generate adequate force at that body segment is true.
Muscle hypertonicity is a medical condition in which muscles become excessively stiff and challenging to stretch. Hypertonicity within an agonist can decrease the neural drive to the antagonist or opposing muscle.
As a result, the opposing muscle is weakened, which then depends on a synergistic muscle to generate sufficient force at that body segment. This is why muscle strength testing is so crucial in the evaluation of patients.
Additionally, it is critical to understand that not all hypertonicity is the same. Different types of hypertonicity have varying effects on muscle function.
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According to the movie "Tobacco Wars," what major change took place in British cigarette consumption patterns during the first half of the twentieth century (particularly 1920s / 1930s)? Select one: a. Government tax cuts on tobacco incentivised large numbers of men to smoke more because of the cheaper tobacco prices b. James Duke's cigarette revolution occurred c. Because there were not yet age limits on tobacco consumption, large numbers of children took up smoking because it was perceived as cool and fun d. James Dean's cigarette revolution occurred e. Large numbers of women took up smoking as a result of cigarette marketing f. Cigarette packaging was made more glamorous with a predominantly gold and red colour scheme g. Changes occurred in harvesting techniques from cutting each leaf separately to mass harvesting
The correct option is e. Large numbers of women took up smoking as a result of cigarette marketing. it was a major change that took place in British cigarette consumption patterns .
During the first half of the twentieth century, particularly in the 1920s and 1930s, a major change in British cigarette consumption patterns occurred with the significant increase in the number of women taking up smoking. This change was primarily driven by aggressive cigarette marketing campaigns targeted at women.
Tobacco companies employed various strategies to appeal to female consumers, presenting smoking as a symbol of independence, sophistication, and liberation. Cigarette advertisements portrayed glamorous and elegant women smoking, associating cigarettes with beauty, fashion, and empowerment. These marketing efforts effectively broke down social taboos and cultural barriers that previously discouraged women from smoking.
The emergence of cigarette marketing targeted at women coincided with shifting societal norms and changing perceptions of femininity.
In summary, Women's increasing participation in public life, including the suffrage movement and changing gender roles, created new opportunities for tobacco companies to tap into a previously untapped market. By capitalizing on the desire for freedom and empowerment, cigarette advertising successfully enticed many women to take up smoking.
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Question 7 1 pts A patient's diastolic pressure is 90 mmHg and systolic pressure is 180 mmHg, what would mean arterial pressure be? O 90 mmHg 0 270 mmHg O 120 mmHg O 150 mmHg Question 8 1 pts Using question above, calculate the pulse pressure (PP)? O 120 mmHg O 90 mmHg O 45 mmHg O 30 mmHg
Question 7: The mean arterial pressure (MAP) is calculated as (2 * diastolic pressure + systolic pressure) / 3. With a diastolic pressure of 90 mmHg and systolic pressure of 180 mmHg, the MAP is 120 mmHg.
Question 8: The pulse pressure (PP) is determined by subtracting the diastolic pressure from the systolic pressure. With a diastolic pressure of 90 mmHg and systolic pressure of 180 mmHg, the PP is 90 mmHg.
Question 7: The mean arterial pressure (MAP) can be calculated using the following formula: MAP = [(2 * diastolic pressure) + systolic pressure] / 3.
In this case, the diastolic pressure is 90 mmHg and the systolic pressure is 180 mmHg. Plugging these values into the formula, we get: MAP = [(2 * 90) + 180] / 3 = 120 mmHg.
Therefore, the mean arterial pressure would be 120 mmHg.
Question 8: Pulse pressure (PP) can be calculated by subtracting the diastolic pressure from the systolic pressure.
In this case, the diastolic pressure is 90 mmHg and the systolic pressure is 180 mmHg. So, PP = systolic pressure - diastolic pressure = 180 mmHg - 90 mmHg = 90 mmHg.
Therefore, the pulse pressure (PP) would be 90 mmHg.
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Describe the clinical features and underlying pathology of progressive bulbar palsy and primary lateral sclerosis.
Progressive bulbar palsy and primary lateral sclerosis (PLS) are rare neurological conditions that affect the motor neurons and cause difficulty speaking, swallowing, and weakness in the limbs.
Progressive bulbar palsy is a type of motor neuron disease that affects the motor neurons in the brainstem, causing difficulty speaking and swallowing. The underlying pathology is degeneration of the motor neurons in the bulbar region, which control the muscles of the face, mouth, and throat. This can lead to slurred speech, difficulty swallowing, choking, and drooling.
Primary lateral sclerosis, on the other hand, is a rare disorder that affects the upper motor neurons in the brain and spinal cord. This can cause weakness and stiffness in the limbs, which may eventually spread to the trunk. Unlike other motor neuron diseases, PLS does not usually cause muscle wasting or twitching.
The underlying pathology of PLS is similar to other motor neuron diseases, with degeneration and loss of the motor neurons. However, the progression is slower and it may take many years for the symptoms to become severe.
Overall, both conditions are rare and have similar underlying pathology involving the degeneration of motor neurons. The clinical features of these diseases include difficulty speaking, swallowing, and weakness in the limbs, which can severely affect the quality of life of patients.
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2. (a) Concerning muscle contraction, outline the Sliding Filament model of muscle contraction.
(b) Concerning the anatomical and physiological features of muscle contraction, compare which type of muscle fibre tend to predominate in the leg muscles of a marathon runner vs a bodybuilder. Explain why.
(a) Concerning muscle contraction, the sliding filament model of muscle contraction is an approach to muscle contraction that focuses on the interplay between the actin and myosin filaments. The following steps are involved in the sliding filament model of muscle contraction:
1. An action potential is generated in a motor neuron.
2. The action potential stimulates the release of calcium ions from the sarcoplasmic reticulum.
3. The calcium ions bind to troponin, which causes the tropomyosin to move aside, exposing the binding sites on the actin filaments.
4. The myosin head binds to the exposed binding site on the actin filament, forming a cross-bridge.
(b) The leg muscles of a marathon runner are dominated by slow-twitch muscle fibers, while the leg muscles of a bodybuilder are dominated by fast-twitch muscle fibers. This is because slow-twitch muscle fibers have a high oxidative capacity and are resistant to fatigue, which makes them ideal for endurance activities such as long-distance running.
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What are Supplementary and complementary genes, explain with example.
Supplementary and complementary genes are two concepts related to gene interactions and inheritance patterns.
1. Supplementary Genes:Supplementary genes refer to a pair of genes that are located on different chromosomes and work together to produce a specific trait. Each gene in the pair independently contributes to the expression of the trait, and the presence of both genes is required for the full expression of the trait. When either one or both of the genes are absent, the trait will not be fully expressed.
An example of supplementary genes can be seen in the flower color of sweet peas. Let's say there are two genes involved: Gene A and Gene B. Gene A controls the production of pigment for blue flowers, and Gene B controls the production of pigment for red flowers. Only when both Gene A and Gene B are present in the plant, the flowers will show a full expression of color, resulting in purple flowers. If either Gene A or Gene B is absent, the flowers will be either blue or red, respectively.
2. Complementary Genes:Complementary genes refer to a pair of genes that are located on the same chromosome and work together to produce a specific trait. However, unlike supplementary genes, the presence of both genes is not necessary for the trait to be expressed. Each gene in the pair independently contributes to the expression of the trait, but if both genes are present, they complement each other, resulting in an enhanced or more pronounced expression of the trait.
An example of complementary genes can be seen in the coat color of some animals, such as Labrador Retrievers. Let's say there are two genes involved: Gene C and Gene D. Gene C controls the production of pigment for black coat color, and Gene D controls the production of pigment for brown coat color. If an individual carries two copies of Gene C, it will have a black coat. If an individual carries two copies of Gene D, it will have a brown coat. However, if the individual carries one copy of each gene (Gene C and Gene D), the genes complement each other, resulting in a unique coat color known as "chocolate," which is a more pronounced expression compared to having just one gene.
In summary, supplementary genes require the presence of both genes for full expression of the trait, while complementary genes enhance or modify the expression of the trait when both genes are present.
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Please help developing 16 weeks exercise prescription.
Including
WEEK
PHASE
INTENSITY (% OF HRR OR RPE)
EXERCISE MODE
DURATION (MIN/ DAY)
MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY SUNDAY
The development of a 16 weeks exercise prescription involves several things. These include weeks, phases, intensity, exercise mode, duration, and days of the week.
Below is a guide on how you can develop a 16 weeks exercise prescription:Phase 1 (Week 1 to Week 4)Intensity: 60% of HRRExercise Mode: Walking, cycling, swimming, or ellipticalDuration: 30 to 40 minutes per day, five days a weekDays of the Week: Monday, Tuesday, Wednesday, Thursday, and Friday.Phase 2 (Week 5 to Week 8)Intensity: 70% of HRR
Exercise Mode: Elliptical, cycling, or joggingDuration: 45 to 60 minutes per day, five days a weekDays of the Week: Monday, Tuesday, Wednesday, Thursday, and Friday.Phase 3 (Week 9 to Week 12)Intensity: 80% of HRRExercise Mode: Jogging, rowing, or bikingDuration: 45 to 60 minutes per day, six days a week
Days of the Week: Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday.Phase 4 (Week 13 to Week 16)Intensity: 90% of HRRExercise Mode: Rowing, biking, or cross-fitDuration: 60 to 90 minutes per day, six days a weekDays of the Week: Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday.
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The vocal folds are part of the
A. laryngopharynx.
B. trachea.
C. nasal cavity.
D. larynx.
E. lungs.
Increased activity of the sympathetic nervous system will
A. increase production of all hydrolytic enzymes by abdominal organs.
B. increase movement of food through the alimentary canal.
C. decrease production of digestive juices.
D. increase only production of those digestive juices rich in buffers.
E. have no effect on the digestive system.
The vocal folds are part of the D. larynx and Increased activity of the sympathetic nervous system will C. decrease production of digestive juices.
A component of the larynx are the vocal folds. It is often referred to as a voice box, and houses the vocal folds, usually referred to as the vocal cords. The vocal folds are housed in a structure called the larynx that is part of the upper respiratory system. It is essential for generating sound and facilitating communication.
Production of digestive juices will decrease as the sympathetic nervous system becomes more active. The "fight or flight" response, which primes the body for strenuous exercise or stress, is brought on by the sympathetic nervous system. In order to allocate energy and resources to other parts of the body, the digestive system's activity decreases during this response. As the emphasis changes away from digestion, this includes a decrease in the synthesis of digestive juices, such as stomach acid and enzymes.
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QUESTION 5 The majority of weight loss is in the form of water when: A. the human body uses protein as a source of energy B. muscle is turned into fat C. fat is turned into muscle D. you drink a lot of water QUESTION 6 Most of the diet plans commercially available to the public: A. are safe to the consumer B. follow sound nutritional guidelines C. are nutritionally balanced D. are fad diets QUESTION 7 Sedentary lifestyle is the primary reason for: A. reduced metabolic rate B. increased metabolic rate C. a neutral metabolic rate D. improved metabolic rate QUESTION 8 The most effective method for spot reducing is: A. do exercises that focus on that muscle group B. reduce calories C. running D.none of the above
The majority of weight loss is in the form of water when the human body uses protein as a source of energy (option A). Most of the diet plans commercially available to the public are fad diets (option D).Sedentary lifestyle is the primary reason for a reduced metabolic rate (option A). The most effective method for spot reducing is none of the above (option D).
Question 5:The majority of weight loss is in the form of water when the human body uses protein as a source of energy. Weight loss is the process of reducing body mass due to either voluntary or involuntary circumstances. It can be a conscious decision to lose weight or due to an underlying health condition.
Question 6: Most of the diet plans commercially available to the public are fad diets. Fad diets are weight-loss programs that promise quick results by promoting strict eating patterns or by avoiding certain foods. Most fad diets focus on short-term weight loss and do not offer long-term solutions.
Question 7: Sedentary lifestyle is the primary reason for a reduced metabolic rate. Sedentary lifestyle or physical inactivity is one of the leading causes of obesity and several other lifestyle disorders. It has been proven that a sedentary lifestyle leads to a reduction in the metabolic rate of the human body.
Question 8: The most effective method for spot reducing is none of the above. Spot reducing refers to the idea that fat can be targeted for reduction from a specific area of the body through exercise of specific muscles in that desired area. This is not entirely true since when we exercise a specific muscle group, fat loss occurs from the entire body and not just that specific area. Therefore, the most effective method for fat loss is overall body exercise or activity combined with a healthy diet.
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REQUIRED: 5. There are two broad categories of hormones, as we discussed them in class: amino acid derivatives and steroid derivatives. Please list three differences between the two groups. Feel free to make a table. (2 pts.)
The table below highlights the differences between amino acid derivatives and steroid derivatives:
1. Chemical composition: They are made up of amino acid molecules that are either modified or combined with other molecules. Steroid hormones have a cholesterol-derived chemical composition.
2. Solubility: They are water-soluble. Steroid hormones are lipid-soluble.
3. Receptor location: They bind to receptors on the surface of the target cell. They bind to receptors inside the target cell. Table demonstrating the differences between amino acid derivatives and steroid derivatives
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SCENARIO #4: A patient has come in to hospital with a significant injury that has caused them a large amount of blood loss. The patient has a medi-bracelet which identifies them as having Type B blood. For each of the following statements, say whether you think the statement is TRUE or FALSE, followed by a short justification of why you came to that conclusion. The loss of blood volume will likely cause the patient to have severe hypertension
Due to the reduced volume of blood, the patient's stroke volume will likely be reduced, which in turn will reduce cardiac output. If the medical staff give the patient a blood transfusion, they can safely use either Type B or Type AB blood.
The statement "The loss of blood volume will likely cause the patient to have severe hypertension" is False.
The loss of blood volume is medically referred to as Hypovolemia. Hypovolemia is the state of having low blood volume or less than the normal volume of blood in the body. This condition is due to the loss of fluids, which may be because of significant injuries that result in blood loss. The symptoms of Hypovolemia include tachycardia, which is an elevated heart rate, low blood pressure (hypotension), weakness, dizziness, and confusion.
The loss of blood volume will likely cause the patient to have severe hypotension rather than hypertension. Hypotension is a condition of low blood pressure that occurs due to low blood volume caused by the loss of blood.The above justification proves that the statement is false.
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