Homeostatic control Flashcards
Stimulus:
change in the environment. E.g.: an irritant, low blood
pressure, foreign chemical, etc.
Receptor:
The site within the body that detects or receives the
stimulus, senses the change from normal, sends signal to
the control center.
Control center:
The operational point, at which the signals are received,
analyzed, and appropriate response is determined. Also
called as the integration center
Effector:
The body site where a response is generated which
counters the initial stimulus and thus attempts to
maintain homeostasis.
Feed-back mechanisms
Methods by which the body regulates the degree of
response that has been elicited. A negative feed-back
depresses the stimulus to shut off or reduce the effector
response, whereas a positive feed-back has the effect of
increasing the effector response.
Walter B cannon
presence of measrable parameters implied the presence of homeostatic systems