Answered: In a positive feedback loop: O…

In a positive feedback loop: O Processes lead back to homeostasis O Processes lead away from homeostasis The effect of the original stimulus is increased O 2nd and 3rd answer are correct

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.

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In a positive feedback loop:
O Processes lead back to homeostasis
O Processes lead away from homeostasis
The effect of the original stimulus is increased
2nd and 3rd answer are correct

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Which component of a homeostatic control mechanism would the life function "responsiveness" be best associated with? O effector O gland O receptor O muscle none of the above Next ► « Previous
The "cause" for something to happen is the O stimulus O response O homeostasis O effect
In negative feedback systems the receptor sends a negative signal the stimulus is increased or amplified the effector reduces or eliminates the stimulus the control center receives input from the effector the receptor increases or enhances the stimulus
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.
Homeostasis can be defined in which of the following ways: using the least amount of energy maintaining a stable internal environment within narrow limits regardless of environmental changes O maintenance of a static state with no deviation from predetermined set points a dynamic state within an unlimited range, depending on circumstances O more than one of the above Next » « Previous
Negative feedback systems keep regulated variables within a normal range by ______________ any upward or downward shift in that variable, i.e. it means an _______________ response to a stimulus.
Which of the following statements is CORRECT in describing the positive feedback control systems in our body? Group of answer choices The response counteracts the stimulus, shutting off the response loop. The response reinforces the stimulus, sending the variable farther from the set-point. The response is able to move the variable closer to the set-point. The response is able to move the variable farther from the set-point by suppressing the stimulus.
In a negative feedback loop, the effector moves the system in the direction as the stimulus.
A negative feedback system is one in which a variable is changed in the same direction as the original change that initiated the system the initiating variable is always reduced (made more negative) a variable is changed in the opposite direction to the original change that initiated the system two opposing variables are played against one other the initiating variable is always increased (made more positive)
ACTIVITY 2 Direction: Draw a Venn Diagram using this table. NEGATIVE FEEDBACK MECHANISM Most control mechanisms in the human body are negative POSITIVE FEEDBACK MECHANISM A positive feedback mechanism ENHANCES the original stimulus to ACCELERATE activity Integrator triggers a move in the SAME DIRECTION triggering an “explosive" response Positive feedback mechanisms are less common Ex. Blood clotting, childbirth (oxytocin) feedback mechanisms A negative feedback mechanism DECREASES the intensity of the stimulus and eliminates it When a variable is above or below set point, integrator triggers a move in the OPPOSITE DIRECTION to reach the set value Ex. Body temperature, blood pressure, pH and CO2 levels, blood glucose levels
. A defective control center (a homeostatic control mechanism component) can lead to: undetermined variable set point inappropriate response to stimuli incorrect analysis of input from effector a and b a, b, and c
Why is feedback important in the body? Give an example on how our body uses the pairing of stimulus and response.