Tuesday, January 24, 2012

2.76 organisms are able to respond to the changes within their environment

SENSITIVITY
the types of changes in the environment include; light level, temperature, pressure and chemicals.
these are stimuli in which organisms can detect using receptors within them.
organisms also have effectors-such as glands and muscles- used to respond to the stimuli detected by the receptor.
the effector ensures the survival of the living organism by responding to the stimuli detected by the receptor.

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