TwoOldGuys™ Study Guides
BI-122 Biology
Animal Physiology 3

Meristem

Organ Systems
support Life functions

exhibit Homeostasis

response to stimulus

Traditional definitions of stimulus and response are circular.
stimulus = "any thing that triggers a response"
response = "what an organism does when it encounters a stimulus"

In other words, stimulus = (see response); response = (see stimulus)

neural regulation

Response is rapid, but of short duration.

chemical regulation



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revised 19 aug 2006