be'ta recep"tor

Biochem., Physiol.
a site on a cell, as of the heart, that, upon interaction with epinephrine or norepinephrine, controls heartbeat and heart contractability, vasodilation, smooth muscle inhibition, and other physiological processes. Also,be'ta-re•cep'tor.Also called beta-adrenergic receptor. Cf. alpha receptor.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

beta raybeta rhythm
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