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Meaning of beta receptor

be'ta recep"tor

Pronunciation: [key]
— Biochem., Physiol. Biochem.,Physiol.
  1. 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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.