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Stimulus
The change is physiological value from homeostasis
Sensory Receptors
The structures that monitors a specific physiological value
Control Center
Receives information from the sensory receptor and compares that info to the normal value/range for homeostasis.
Effector
The structures that the control center activates if the physiological value is too far from the set point.
Response
The activation of specific structures in order to return the physiological value to homeostasis