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, al·pha-re·cep·tor.
Also called alpha-adrenergic receptor.
Compare beta receptor.


Origin:
1960–65
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Alpha receptor is always a great word to know.
So is bezoar. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
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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