A site in autonomic nerve pathways wherein inhibitory responses occur when adrenergic agents; such as, norepinephrine and epinephrine are released.

A hormone, secreted by the adrenal gland and similar to epinephrine, that is the principal neurotransmitter of sympathetic nerve endings supplying the major organs and skin.

It increases blood pressure and rate and depth of breathing, raises the level of blood sugar, and decreases the activity of the intestines.