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Homeostasis
Understand the concept of homeostasis
12
Biology
Undergraduate 1
09/07/2013

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Term
What is Homeostasis?
Definition
Maintenance of a constant internal environment
Term
Examples of Homeostasis
Definition
Body temperature, blood pressure, and heart rate are maintained in a constant range of conditions or variables.
Term
Variables of Homeostasis
Definition
Conditions that change that can affect the internal environment
Term
A set point
Definition
Is the ideal normal value of a normal range of conditions or variables.
Term
What is the set point for human blood pressure?
Definition
120/80 milometers of Mercury (mm Hg) 120 mm Hg when the hear beats (systolic) and 80 when it rests (diastolic).
Term
What is the set point for human body temperature?
Definition
98.6 degrees Fahrenheit
Term
Negative Feedback
Definition
mechanism that regulates homeostasis which is a deviation from set point
Term
Negative Feedback
Definition
Components of this homeostasis mechanism are control center, receptor, and effector.
Term
Control center component of negative feedback is the brain. What is its function?
Definition
Establishes set point
Term
Receptor component
Definition
detects changes due to changing variables
Term
Effector compontent
Definition
Responds to changes detected
Term
Positive Feedback
Definition
deviation from set point become greater, thus making a bad situation worse
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