second messenger

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Diagram showing how epinephrine binding to a beta-adrenergic receptor on a cell membrane activates a G-protein, which then stimulates adenylyl cyclase to convert ATP into cyclic AMP (cAMP), leading to physiological effects such as increased heart rate, blood vessel dilation, and glycogen breakdown.

second messenger: References & Edit History

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Article Contributors

Primary Contributors

John A. Cooper
Professor of Cell Biology and Physiology, Washington University, St. Louis, Missouri

Other Encyclopedia Britannica Contributors

Article History

Type	Description	Contributor	Date
	Add new Web site: Hypertexts For Biomedical Sciences - Hormones with Cell Surface Receptors.	Gloria Lotha	Feb 14, 2011
	New article added.	Kara Rogers John A. Cooper	Jan 19, 2009