chemical stimulus

chemical stimulus
a chemical substance capable of exciting a response in an organism mediated through specialized nerve endings.

Medical dictionary. 2011.

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  • stimulus — stimulus, stimulant, excitant, incitement, impetus can all mean an agent that arouses a person or a lower organism or a particualr organ or tissue to activity. Only the first three words have definite and common technical use. Stimulus, in this… …   New Dictionary of Synonyms

  • Stimulus — Stim u*lus, n.; pl. {Stimuli}. [L., for stigmulus, akin to L. instigare to stimulate. See {Instigare}, {Stick}, v. t.] 1. A goad; hence, something that rouses the mind or spirits; an incentive; as, the hope of gain is a powerful stimulus to labor …   The Collaborative International Dictionary of English

  • stimulus — noun ADJECTIVE ▪ great, major, powerful, strong ▪ negative, positive ▪ conditioned, unconditioned …   Collocations dictionary

  • Chemical synapse — This article is about chemical synapses of the nervous system. For other uses, see Synapse (disambiguation). Illustration of the major elements in chemical synaptic transmission. An electrochemical wave called an action potential travels along… …   Wikipedia

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  • Odor — Aroma redirects here. For other uses, see Aroma (disambiguation). Allegory of the senses by Jan Brueghel the Elder, Museo del Prado An odor or odour is caused by one or more volatilized chemical compounds, generally at a very low concentration,… …   Wikipedia

  • mechanoreception — See mechanoreceptor. * * * Ability to detect and respond to mechanical stimuli in one s environment. A slight deformation of a mechanoreceptive neuron causes an electric charge at its surface, activating a response. Mechanoreceptors in pain spots …   Universalium

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