Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 38, Problem 5MC
Summary Introduction
Introduction:
For the efficient operation of the biochemical pathway, the activity of the reactions in that pathway needs to be regulated and coordinated. The feedback loop can be defined as the process in which the output of the system becomes the input of the same system.
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Check out a sample textbook solutionStudents have asked these similar questions
In a negative feedback mechanism,a. the output cancels the input.b. there is a fluctuation above and below the average.c. there is self-regulation.d. a regulatory center communicates with other body parts.e. All of these are correct.
Which of the following is true of positive feedback?
a. The change is opposite that of negative feedback
b. The effector turns off the response
c. The change is amplified
What is the difference between the answers a & b?
Mark the following statements as true or
false. If a statement is false, correct it to
make a true statement.
a. Structure and function are closely
related at the organ level only.
b. Homeostasis is the condition of having a
dynamic equilibrium of the internal
environment.
c. Positive feedback loops are triggered by
a deviation from a homeostatic set point
and are shut down when conditions return
to the set point.
d. The effects of negative feedback loops
are amplified to create an escalating
response.
e. Cell-cell communication is required to
coordinate the activities of the whole body
Chapter 38 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 38.1 - describe the four methods of communication between...Ch. 38.1 - Prob. 2CYLCh. 38.1 - Prob. 3CYLCh. 38.2 - Insulin is a large, water-soluble hormone that...Ch. 38.2 - Prob. 1CYLCh. 38.2 - Prob. 2CYLCh. 38.2 - explain the processes of negative and positive...Ch. 38.3 - Prob. 1CSRCh. 38.3 - Prob. 1CYLCh. 38.3 - Prob. 1ET
Ch. 38.3 - Prob. 1HYEWCh. 38.3 - A common test of thyroid gland function is to...Ch. 38.3 - explain how negative feedback regulates the...Ch. 38.3 - Prob. 2TCCh. 38.3 - Endocrine disruptors have most frequently been...Ch. 38 - A student rescan, her decides to perform an...Ch. 38 - Prob. 1FIBCh. 38 - Prob. 1MCCh. 38 - Which chemical class of hormones usually attaches...Ch. 38 - Prob. 2ACCh. 38 - Most endocrine hormones fall into three chemical...Ch. 38 - Prob. 2MCCh. 38 - Prob. 2RQCh. 38 - Prob. 3FIBCh. 38 - Steroid hormones include a. testosterone. b....Ch. 38 - Prob. 3RQCh. 38 - Prob. 4FIBCh. 38 - Prob. 4MCCh. 38 - Prob. 4RQCh. 38 - The pancreas releases the hormone _________ when...Ch. 38 - Prob. 5MCCh. 38 - Prob. 5RQCh. 38 - Prob. 6FIBCh. 38 - Prob. 6RQCh. 38 - The adrenal cortex releases three major types of...
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- Positive feedback mechanisms are beneficial, but they need to be controlled. Discuss a scenario where if positive feedback was allowed to continue, the body might get damaged.arrow_forwardWhich of the following is a way that the body determines how much of a certain chemical, protein, enzyme, or response is needed to maintain homeostasis? A. Resource limitation, B. Feedback inhibition, C. Kickback inhibition, D. Signal looparrow_forwardSelect the statements that correctly describe negative feedback pathways. 1. A sensor/receptor is required to monitor and limit levels. 2. A sensor/receptor is unnecessary to monitor and limit levels. 3. Feedback contributes to homeostasis. 4. Feedback prevents homeostasis. 5. Feedback stimulates the effector to continue to do the same thing. 6. Feedback stops the effector from doing one thing and stimulates it to do the opposite. 7. When the target level for a hormone is reached, feedback results in an increase of that hormone being released. 8. When the target level for a hormone is reached, feedback results in a reduction of that hormone being released. Record your answers in ascending (lowest to highest) order.arrow_forward
- Select the statements that correctly describe positive feedback pathways. 1. A sensor/receptor is required to monitor and limit levels. 2. A sensor/receptor is unnecessary to monitor and limit levels. 3. Feedback prevents homeostasis. 4. Feedback contributes to homeostasis. 5. Feedback stimulates the effector to continue to do the same thing. 6. Feedback stops the effector from doing one thing and stimulates it to do the opposite. 7. When the target level for a hormone is reached, feedback results in a reduction of that hormone being released. 8. When a target level for a hormone is reached, feedback results in an increase of that hormone being released. Record your answers in ascending (lowest to highest) order.arrow_forwardWhich is/are example(s) of negative feedback? Select ALL that apply A. when your body gets too hot, the body starts to sweat, which helps cool you down B. when a pathogen is detected, an immune cell releases cytokines, which signal other cells to release cytokines, increasing the total number released over time C. when too much glucose builds up in the blood, insulin is released so that cells will absorb the glucose D. when you have a cut, platelets activate and work to form a clot, which signals more and more platelets to activate and help form the clotarrow_forwardHomeostasis a. is a dynamic process. b. describes the maintenance of the internal environment of the body. c. is essential to life. d. All of the choices are correct.arrow_forward
- Why do healthcare professionals divide the body into different planes and regions? A. In medicine, a few regions are more important than others. B. So they can determine which type of medical specialist to inform. C. It helps describe specific locations of pain, discoloration, or injury. D. Each area is tied to a specific kind of medicine. (e.g you can’t use morphine in the iliac)arrow_forwardHomeostasis maintains the body’s internal conditions within a narrow range.a. Trueb. Falsearrow_forwardTo achieved homeostasis, the nervous system and endocrine system maintain Normal range of the following variables, EXCEPT? a.Blood calcium level b.Hormones in the cell c.Body Temperature d.Amount of water in the bodyarrow_forward
- Which of the following mechanisms could both be used by the body to increase body temperature if a person forgets a coat on a cold day? A. Superficial blood vessels dilate, and the thyroid decreases metabolism. B. Superficial blood vessels constrict, and the thyroid decreases metabolism. C. Superficial blood vessels dilate, and the thyroid increases metabolism. D. Superficial blood vessels constrict, and the thyroid increases metabolism.arrow_forwardWhich statements describe how systems interact to produce the fight-or-flight response?Select the two correct answers. A The digestive system interacts with the excretory system, supplying hormones to slow the production of urine. B The endocrine system floods the circulatory system with hormones that affect several other body systems. C The endocrine system supplies the lungs with insulin, allowing increased absorption of oxygen. D The digestive system creates hormones that are sent to the muscular system, resulting in increased blood flow to muscles. E The muscular system sends receptors to the circulatory system to increase blood pressure and heart rate. F The circulatory system experiences a change in blood flow, which allows the muscular system to obtain additional glucose.arrow_forwardWhich of the following are examples of maintaining homeostasis (more than one answer may be correct)? a. You develop diarrhea in response to contracting norovirus b. Sweating due to eating spicy food c. Kidneys removing excess fluid through urine d. Insulin is released in response to high blood sugar, causing cells to use more sugararrow_forward
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