AP BIOLOGY

Detailed explanation-1: -Through its action on alpha-1 receptors, epinephrine induces increased vascular smooth muscle contraction, pupillary dilator muscle contraction, and intestinal sphincter muscle contraction. Other significant effects include increased heart rate, myocardial contractility, and renin release via beta-1 receptors.

Detailed explanation-2: -In stressful or shocking situations, our adrenal gland releases epinephrine, also called adrenaline, into the bloodstream where it temporarily dilates our pupils, increases muscle efficiency to make us stronger, and increases transmission rates of oxygen-delivery systems.

Detailed explanation-3: -epinephrine, also called adrenaline, hormone that is secreted mainly by the medulla of the adrenal glands and that functions primarily to increase cardiac output and to raise glucose levels in the blood.

Detailed explanation-4: -Norepinephrine is produced in the inner part of the adrenal glands, also called the adrenal medulla. The adrenal medulla also makes adrenaline (also known as epinephrine).