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16 Cards in this Set
- Front
- Back
Homeostasis
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the exsistance & maintenance of a relatively constant enviornment within the body
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variables
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body conditions that change over time; a condition such as temperature that can change.
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set point
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the normal value for a body condition
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Normal Range
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SLight increases and decreases of a variable around the set point
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Homeostasis is the maintenance of a ____ around an ideal _____ or ______ to establish a normal range of values.
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variable
normal value set point |
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Negative Feedback
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Is a mechanism used by the body to regulate most systems. Negative means that any deviation from the set point is made smaller or resisted.
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What are the three components of negative feedback
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receptor
control center effector |
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what is the job of the receptor?
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to monitor the values of some variable such as blood pressure
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what is the job of the control center?
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to establish a set point around which the variable is maintained
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what is the job of the effector?
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to change the value of a variable
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A deviation from the set point is called _______?
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stimulus
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Explain how negative feedback works
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The receptor detects the stimulus and informs the control center, which analyzes the input from the receptor. The control center sends output to the effector, and the effector produces a response, which tends to return the variable back toward the set point.
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study
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study the diagram
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study
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study the diagram
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Stimulus
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a deviation from a set point
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Give an example of good positive feedback
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childbirth
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