The Core Concepts of Physiology by Joel Michael William Cliff Jenny McFarland Harold Modell & Ann Wright

Author:Joel Michael, William Cliff, Jenny McFarland, Harold Modell & Ann Wright
Language: eng
Format: epub
Publisher: Springer New York, New York, NY

7.5.5 The Number of Receptors on a Target Cell Is Small (1 to Few)

Students commonly respond to questions or problem as if they believe that cells have small number of receptors, in some cases implying that there is a single receptor for each chemical messenger. This misconception probably arises from the fact that few textbooks explicitly discuss the binding of a messenger molecule to a receptor is a probabilistic event, and that number of receptors that are present for any system, even when they describe processes of up- and downregulation that can change that number.

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