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, increasing

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, increasing

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter1: Introduction To Physiology And Homeostasis

Section1.4: Homeostatic Control Systems

Problem 3CYU: Draw a row diagram showing the relationships among the components of a negative-feedback control...

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Concept explainers

Homeostasis

Homeostasis is a self-regulatory process through which different biological systems maintain constant internal environmental conditions to compensate for environmental changes. In human physiology, it is a process of self-regulating internal, chemical, and physical conditions at an optimal level for survival. The stability through homeostasis can be attained through dynamic equilibrium, in which there is a continuous change until it reaches its systemic conditions.

Question

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, increasing

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Draw a row diagram showing the relationships among the components of a negative-feedback control system.
In 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.
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?
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 the correct definition of positive feedback? a The process by which the body neglects homeostasis. b A mechanism in which the body's response to a stimulis opposes the stimulus. c A mechanism whereby the body responds to a stimulus by acting to enhance the stimulus d The dynamic equilibrium maintained by an integrating center which causes an effector to respond to the stimulus received by the receptor.
What is the difference between positive and negative feedback? (Use the article attached)
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. Temperature
. A self-amplifying chain of physiologicalevents is calleda. positive feedback.b. negative feedback.c. dynamic constancy.d. homeostasis.e. metabolism.
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 increased
When you step outside in the cold, your body temperature decreases; which causes shivering or contractions of your muscles. In this example, the shivering or contracting of the muscles, is what part of the feedback loop?
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.
Describe how blood sugar (e.g. glucose plasma concentration) is regulated with the hormones, insulin, and glucagon. For this feedback loop, identify the following components of the feedback loop: stimulus, receptor, control center, efferent pathway, effector, and response. Be comfortable with this feedback loop to be able to describe the effects of changing various components of the feedback loop.