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Alpha Adrenergic Response

Meaning

The Alpha Adrenergic Response describes the physiological effects mediated primarily by the alpha-1 and alpha-2 adrenergic receptors, which are activated by the catecholamines norepinephrine and epinephrine. This response is critical for redirecting blood flow and maintaining vascular tone during acute stress. It typically involves vasoconstriction in non-essential vascular beds, such as the skin and gut, and plays a vital role in blood pressure regulation. Clinically, this cascade is a key component of the sympathetic nervous system’s preparation for immediate action.