Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Question
Chapter 40, Problem 10TYK
Summary Introduction
Introduction: A feedback mechanism is a common mechanism of hormonal or nervous control and regulation. There are two types of feedback mechanisms: positive feedback and negative feedback mechanisms. In the negative feedback mechanism, sensory cells or receptors found in the vertebrate body constantly monitor the reference point of the internal surrounding.
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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 not true for f negative feedback loops?
A. In a negative loop, the response to the signal or stimulus decreases the original signal or stimulus.
B. Negative feedback loops maintain homeostasis.
C. Negative feedback loops are temporary.
D. There are many more instances of negative feedback loops in the human body than positive feedback loops.
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 40 Solutions
Study Guide for Campbell Biology
Ch. 40 - List some advantages of a compact, complex body...Ch. 40 - Name the two types of epithelia illustrated below....Ch. 40 - Prob. 3IQCh. 40 - Prob. 4IQCh. 40 - What is positive feedback? Give an example. Are...Ch. 40 - Prob. 6IQCh. 40 - Prob. 7IQCh. 40 - Describe the following types of torpor. What...Ch. 40 - Organs are composed of layers of several different...Ch. 40 - Prob. 2SYK
Ch. 40 - Prob. 3SYKCh. 40 - Tunas, dolphins, penguins, and sharks all have a...Ch. 40 - Prob. 2TYKCh. 40 - Prob. 3TYKCh. 40 - Prob. 4TYKCh. 40 - Prob. 5TYKCh. 40 - Consider an epithelium consisting of several cell...Ch. 40 - Prob. 7TYKCh. 40 - Prob. 8TYKCh. 40 - Prob. 9TYKCh. 40 - Prob. 10TYKCh. 40 - Prob. 11TYKCh. 40 - Prob. 12TYKCh. 40 - Prob. 13TYKCh. 40 - Prob. 14TYKCh. 40 - Prob. 15TYKCh. 40 - Prob. 16TYKCh. 40 - Prob. 17TYKCh. 40 - For most terrestrial animals, the average daily...Ch. 40 - Prob. 19TYK
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- which of the following scenarios can be classified as a negative feedback loop? a. increase in oxytocin caused by increased contractions b. increase in blood pressure to reduce heart rate c. increase in testosterone to help increase a fight or flight response d. increase in platelet production to help increase blood clottingarrow_forwardWhich of the following is incorrect?a. Equilibrium requires a constant input of energy.b. Positive feedback is less common in nature than negative feedback.c. Homeostasis does not imply that a given variable is unchanging.d. Fever is an example of resetting a set point.e. Efferent pathways carry information away from the integrating center of a reflex arc.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_forward
- Match the body temperature control item to the appropriate location in the negative feedback loop. Effector when variable is low Effector when variable is high Control center Sensor Controlled variable A. Muscles for shivering and goosebumps B. Nerves in skin C. Brain D. Sweat glands E. Temperaturearrow_forwardIn negative feedback,a. a change causes responses that counteract the change.b. a response to a change damages the body.c. a change produces a response that enhances the change.d. a response to a change permanently alters the body.arrow_forwardwhich of the following statements are true about homeostasis? Select all that apply. a. The selective permeability of the cell membrane allows for thermoregulation. b. Homeostasis is an organism‘s way of maintaining constant and balanced internal processes. c. Ectotherms rely on environmental heat to maintain homeostasis. d. Homeostasis works by a system of positive feedback.arrow_forward
- In negative feedback, the variable being regulated is changed in the ______ direction, while in positive feedback the variable is changed in the ______ direction. A. same, opposite B. negative, positive C. opposite, same D. decreasing, increasingarrow_forwardwhich of the following situations illustrates that a homeostatic mechanism is not operating properly? a. acute high blood pressure b. normalized blood glucose levels c. dailt fluid intake equals dailty fluid output d. all of these illustrate homestatic mechanisms operating properlyarrow_forwardHomeostasis is best described as a. Every deviation in the value of a physiological parameter is corrected by negative feedback regulation b. The body's internal environment is constantly changing The tendency of organisms to maintain a relatively constant internal environment d. The product of a chemical reaction negatively feeds back to inhibit its own production e. Physiological parameters do not changearrow_forward
- a positive-feedback system is one in which a. a variable is charged in the opposite direction to the original change that initiated the system b. a variable is changed in the same direction as the original change that initiated the system c. two opposiding variables are played against each other d. the initiating variable is always increasedarrow_forwardIn a negative feedback loop, the effector produces changes that are a. in the same direction as the change produced by the initial stimulus. b. opposite in direction to the change produced by the initial stimulus. c. unrelated to the initial stimulus.arrow_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
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