GENERAL HISTOLOGY

Detailed explanation-1: -When a person experiences stress or fear, their body releases epinephrine . This increases heart rate and breathing and gives the muscles a jolt of energy. It also helps the brain make quick decisions. However, chronic stress can cause the body to release too much epinephrine.

Detailed explanation-2: -Adrenaline, in contrast, relaxes the muscle of the stomach and intestine and decreases the flow of blood to these organs, slowing (or stopping) digestion.

Detailed explanation-3: -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-4: -Epinephrine (also called adrenaline), norepinephrine, and dopamine make up a small but important hormone family called catecholamines. Epinephrine and norepinephrine are the hormones behind your “fight-or-flight” response (also called the fight, flight, or freeze response).