what do beta adrenergic receptors do to the lungs
Beta blockers block the action of endogenous catecholamines epinephrine (adrenaline) and norepinephrine (noradrenaline) -in particular on adrenergic beta receptors, of the sympathetic nervous system, which mediates the fight-or-flight response.hree types of beta receptors are known, designated Î² 1, Î² 2 and Î² 3 receptors. Î²1-adrenergic receptors are located mainly in the heart and in the kidneys. Î²2-adrenergic receptors are located mainly in the lungs, gastrointestinal tract, liver, uterus, vascular smooth muscle, and skeletal muscle.