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Homeostasis
Its Control
9
Anatomy
Graduate
01/09/2013

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Term
Homeostasis
Definition
maintenance of the volume and composition of the body fluids that are found inside cells as well as surrounding them. 
Term
Intracellular
Definition

Fluid within cells

 

Term
Extracellular
Definition

fluids outside the body cells

Ex:Interstitial fluid lies within the narrow spaces between  cells of tissue. 

Term
Feedback System
Definition

Cycle of events in which the status of a body condition is monitored, evaluated, changed and reinforced, reevaluated.

Three components: Receptor, control center and effector

Term
Receptor
Definition
body structure that monitors changes in a controlled condition and sends input to a control center via the afferent pathway
Term
Control Center
Definition
sets the range of values within which a controlled condition should be maintaind, evaluates the input it receives and generates output commands when needed via efferent pathway
Term
Effector
Definition
body structure that receives output from the control center and produces a response or effect that changes the controlled condition.
Term
Negative Feedback
Definition

Reverses a change in controlled conditrion

Ex: Blood Pressure control.

Term
Positive Feedback
Definition

Tends to strenghten or reinforce a change in the body's controlled conditions. 

Ex: labor contractions

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