Why are negative feedback loops more common than positive feedback loops? Provide an example of a homeostatic mechanism that uses a negative feedback loop. | Homework.Study.com (2024)

Get access to this video and our entire Q&A library

• 1. How do negative feedback loops differ from positive feedback loops? Give one example of each from the human body, and explain what properties it has that makes it either positive or negative feedback. 2. Compare the properties of channels and carriers.
• Explain the difference between a negative and positive feedback loop.
• Give two examples of a negative feedback loop and one example of a positive feedback loop within the normal physiologic function.
• Explain why a negative feedback loop develops when acidic chyme stimulates the production of bicarbonate ion secretions.
• Explain the negative feedback loop by which erythropoiesis is regulated.
• Describe positive feedback mechanism and explain how this process functions in homeostatic control of one body function.
• 1. What is positive feedback? Describe an example of positive feedback 2. What is negative feedback? Describe an example of negative feedback.
• Describe the negative feedback loop that controls the blood glucose level. Explain what happens if blood glucose levels drop too low, making sure to list the effector(s).
• Give an example of negative feedback system in the body and how it works.
• How does negative and positive feedback maintain body homeostasis?
• When you become dehydrated, you drink water. Is the thirst mechanism a positive feedback mechanism or a negative feedback mechanism? Explain.
• Explain why positive feedback occurs in blood clotting.
• Positive feedback loops are generally found in processes which are ______
• What is the ultimate result of positive feedback and negative feedback in anatomy and physiology?
• Explain how scratching an itch is an example of a negative feedback mechanism.
• Give a biological example of negative feedback and describe the specific components involved in the process. Do the same for an example of positive feedback.
• Differentiate the negative feedback system and a positive feedback system.
• What is the difference between positive and negative feedback?
• Describe the normal negative feedback system of the hypothalamus as it relates to food.
• Explain the concept of negative feedback.
• Explain what a homeostatic mechanism is and how it is used to maintain conditions for life within the body. Specifically address how homeostatic feedback loops are activated in response to changes in two of the major requirements for life of all organisms
• Explain positive and negative feedback in homeostasis to a newly diagnosed diabetic patient?
• Define homeostasis and how it is maintained within the body and give examples of both negative and positive feedback.
• What is the response of the effector to a stimulus in a negative feedback system?
• Describe the role of the effector in the negative feedback system.
• Describe the negative feedback loop that controls the rate of erythropoiesis. Under what circ*mstances would you expect the rate of erythropoiesis to be increased? How would it be possible to tell if the rate of erythropoiesis is elevated?
• Explain how the human body maintains blood Ca2+ levels via negative feedback mechanisms.
• Does this model represent positive or negative feedback? Explain.
• Explain the role of feedback loops.
• a. Explain the concept of negative feedback. b. Indicate what is meant by a sensor, an integrating center, and an effector. Use blood pressure as an example.
• What is the importance of positive feedback in blood clotting? Why does it occur?
• Explain the regulation of blood glucose through negative feedback mechanisms.
• When we begin to get dehydrated, we usually get thirsty, which causes us to drink? Is this a negative or positive feedback control system? Explain.
• Describe in detail how the renin-angiotensin negative feedback loop helps regulate blood pressure and glomerular filtration rate in response to dehydration.
• Analyze the feedback mechanisms that maintain homeostasis, and what happens when these systems do not function appropriately. Provide two specific examples for each.
• Describe the negative feedback role of progesterone.
• Define and discuss the term feedback mechanism.
• Compare and contrast the general physiological roles of positive and negative feedback in maintaining homeostasis in the body.
• How does the concept of negative feedback integrate with the functions of different organ systems and relate to the whole organism?
• What is negative feedback?
• Describe the negative feedback role of inhibin.
• How does negative feedback change insulin and glucagon concentrations?
• How is the regulation of blood calcium concentration is an example of negative feedback and homeostasis?
• When performing experiments, why would one have a negative control and a positive control?
• What is not a component of a feedback loop?
• Childbirth is an example of: a. negative feedback b. positive feedback c. compensatory regulation d. facilitation
• Provide one example of negative feedback.
• Why doesn't a negative transfusion reaction occur the first time a Rh positive person is exposed to negative blood?
• Explain how the regulation of blood calcium concentration is an example of negative feedback and homeostasis.
• Explain the countercurrent multiplier mechanism of the loop of Henle.
• Why doesn't a negative transfusion reaction occur the first time an Rh+ person is exposed to negative blood?
• How does the Tubuloglomerular feedback mechanism work?
• A typical negative feedback control system involves the following components
• In layman's terms, how would I inform a newly-diagnosed diabetic patient about the roles positive and negative feedback play in maintaining homeostasis?
• Sympathetic response causes sweat production. Explain.
• Describe each homeostatic mechanism using detailed descriptions.
• Explain how and why filtrate osmolarity decreases along the ascending loop of Henle.
• Explain why routine anti D prophylaxis is not administered to a D negative mother who has delivered a D positive baby but has previously been sensitized to D antigen.
• Define homeostasis and describe the parts and functions of the homeostatic control mechanism.
• What are the causes and effects of homeostatic imbalance?
• Explain what is meant by positive and negative chronotropic and inotropic agents. Give two examples of each
• Hemostasis is an example of which kind of homeostatic mechanism?
• Why is homeostatic regulation important?
• Explain why an Rh-negative person does not have a transfusion reaction on the first exposure to Rh-positive blood but does have a reaction on the second exposure.
• Why are effects from the sympathetic nervous system longer-lasting than parasympathetic?
• An amphibian's kidneys lack nephron loops. Why can't a human also live without nephron loops?
• What are the consequences of losing homeostatic balance? Give an example.
• What are the differences between positive and negative selection?
• Describe two solutions that are available to return the body to homeostasis.
• (a) What are some mechanisms used to maintain homeostasis? (b) Why can failure of these mechanisms result in pathologies?
• Why is homeostasis implies a healthy state?
• Explain the effect of sympathetic and parasympathetic systems on different organs.
• Explain homeostasis.
• Describe an example of a homeostatic process that takes place in the body that involves the Muscle system.
• Explain what homeostasis is.
• What is the difference between positive and negative selection?
• Explain how the sympathetic system might affect respiration and heart rate.
• Describe an example of a homeostatic process that takes place in the body that involves the Nervous system.
• During respiratory acidosis, explain how the renal compensatory mechanism works to return the body back to homeostasis.
• Why is it important to have antibodies? Why is antibody production critical?
• Why do the effects of the sympathetic and parasympathetic divisions differ?
• Explain the mechanism responsible for summation of contractions and the increase in height of contraction when the stimulus frequency is increased.
• a. Explain the mechanisms by which the liver and kidney retain glucose but eliminate urea. b. Outline the structure of these organs and explain how they achieve this function. c. Explain the regulation of blood glucose through negative feedback mechanism
• Mr.Smith is hyperglycemic with a blood glucose level of 300 mg/ml of blood. Explain how homeostasis would regulate his glucose levels through a negative feedback system.
• Explain the relationship between electrochemical gradients and the maintenance/restoration of homeostasis. In other words generally explain the link between electrochemical gradients and homeostatic control mechanisms. (Note: Certain general details shoul
• Discuss the mechanism and consequence of ADH and aldosterone on the kidneys.
• Provide specific examples to demonstrate how the muscular system responds to maintain homeostasis in the body.
• Explain how disorders of the endocrine system disrupt homeostasis.
• How is the concept of homeostasis (or its loss) related to disease and aging? Provide examples to support your reasoning.
• During respiratory alkalosis, explain how the renal compensatory mechanism works to return the body back to homeostasis. Be sure to indicate which substances are excreted or reabsorbed from the body in your explanation.
• During metabolic acidosis, explain how the respiratory compensatory mechanism works to return the body back to homeostasis. Be sure to indicate which substance is removed from the body in your explanation.
• Compare and contrast positive and negative nitrogen balances, and discuss the scenarios and situations in which each of these conditions could happen.
• Explain why a lack of ATP would cause muscles to stay relaxed or contracted. How would your range of motion be affected if you lacked a sternocleidomastoid? Why do you think cold compressions reduce blood flow to the ankle and heat would increase blood fl
• List and describe the three components of a homeostatic system.
• During metabolic alkalosis, explain how the respiratory compensatory mechanism works to return the body back to homeostasis. Indicate which substance is kept in the body in your explanation.
• What produces the ERG? Describe the placement of the electrodes and why you expect to see an ERG with a negative polarity.
• Describe an example of a homeostatic process that takes place in the body that involves the Integumentary system.
• a. Discuss three ways that homeostasis may be disrupted if the appropriate electrolyte levels and pH of body fluids are not maintained. b. What solutions are available to return the body to homeostasis?
• Explain why an animal with longer loops of Henle would produce smaller volumes of more concentrated urine.
• Explain how the central nervous system maintains homeostasis and how the peripheral nervous system maintains homeostasis using the parts that make up the system.