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alpha-adrenergic receptor

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.03 sec.
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. Also called alpha-receptor.
alpha-adrenergic receptor.
alpha-adrenergic receptor
receptors in effector organs which respond to epinephrine and norepinephrine; includes receptors in heart muscle which are responsible for increasing rate and force of cardiac contractions.


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