![]() When sympathetic activity increases, postganglionic sympathetic neurons release norepinephrine onto adrenergic receptors of target tissues and organs.Īdditionally, sympathetic preganglionic neurons that terminate on the adrenal medulla will cause adrenal secretion of norepinephrine and epinephrine into the bloodstream. These catecholamines are primarily influenced by the sympathetic nervous system. ![]() If you are coming here from the beta adrenergic receptor blog post, then you can skip to the next section below as this is a refresher.Īdrenergic receptors are located on cells of tissues and organs throughout the body, and are the targets of catecholamines such as epinephrine and norepinephrine.
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