alpha-adrenergic receptor


noun Physiology.

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Definition for alpha-adrenergic receptor (2 of 2)

alpha receptor

or al·pha-re·cep·tor


noun

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

Origin of alpha receptor

First recorded in 1960–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Medical definitions for alpha-adrenergic receptor

alpha-adrenergic receptor

n.

Any of various cell membrane receptors that can bind with norepinephrine and related substances that activate or block the actions of the cells containing such receptors; these cells initiate physiological responses such as vasoconstriction, pupil dilation, and contraction of pilomotor muscles.alpha-receptor
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.