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Norepinephrine Response

Meaning

The rapid physiological cascade initiated by the release of the catecholamine norepinephrine (noradrenaline) from sympathetic nerve terminals and the adrenal medulla, serving as a primary effector of the “fight or flight” stress response. This response is characterized by immediate, widespread systemic effects, including increased heart rate, elevated blood pressure, enhanced vigilance, and rapid mobilization of energy substrates. It is a critical component of the body’s acute defense and arousal system, mediated by the Sympathetic-Adreno-Medullar (SAM) axis.