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Related to beta receptor: alpha receptor
beta receptorA trio of G protein-coupled cell membrane receptors in the sympathetic nervous system, which dampen the response to catecholamines. They are divided into Beta-1, -2 and -3 receptors.
Beta-1 receptor increases cardiac output by raising the heart rate, impulse conduction, and contraction, thereby increasing the left ventricular ejection fraction; increases juxtaglomerular renin secretion; increases gastric secretion of ghrelin (the hunger hormone, which contrasts to leptin, the satiation hormone).
Beta-2 receptor prompts smooth muscle relaxation resulting in bronchodilation; reduced GI motility; relaxation of detrusor muscle of the bladder; glycogenolysis and gluconeogenesis; and increased renin secretion.
Beta-3 receptor increases lipolysis in fat and thermogenesis in skeletal muscle.
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