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Stimuli |
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Stimuli
in biology, various alterations in the external or internal environment of an organism that are capable, when acting on a biological system such as nervous, muscular, or glandular tissue, of altering the system’s original state, that is, of producing excitation. Stimuli may be physical, chemical, and physicochemical and adequate or inadequate. They affect specific nerve endings (receptors) and other cells of organs and tissues. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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