alpha receptor

alpha receptor

noun
a site on a cell that, upon interaction with epinephrine or norepinephrine, controls vasoconstriction, intestinal relaxation, pupil dilation, and other physiological processes.
Also, alpha-receptor.
Also called alpha-adrenergic receptor.
Compare beta receptor.


Origin:
1960–65

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
alpha receptor

noun
receptors postulated to exist on nerve cell membranes of the sympathetic nervous system in order to explain the specificity of certain agents that affect only some sympathetic activities (such as vasoconstriction and relaxation of intestinal muscles and contraction of smooth muscles) 
WordNet® 3.0, © 2006 by Princeton University.
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