adrenalint

Adrenalin, also known as epinephrine, is a hormone and neurotransmitter produced by the adrenal glands. It plays a crucial role in the body's "fight-or-flight" response, a physiological reaction that occurs in response to a perceived harmful event, attack, or threat to survival. When the body senses danger, the adrenal glands release adrenalin into the bloodstream, triggering a cascade of physical changes designed to prepare the individual for intense physical activity.

These changes include an increase in heart rate and blood pressure, a redirection of blood flow to muscles, and a rise in blood glucose levels to provide a quick source of energy. Adrenalin also dilates the airways, allowing for increased oxygen intake, and can sharpen the senses. These physiological effects are mediated by the binding of adrenalin to adrenergic receptors on various tissues and organs throughout the body.

Beyond its role in acute stress, adrenalin has medical applications. It is used to treat anaphylaxis, a severe, life-threatening allergic reaction, by counteracting the airway constriction and vasodilation that occur. It is also used in cardiopulmonary resuscitation (CPR) to stimulate the heart and increase blood flow. The effects of adrenalin are generally short-lived, as it is quickly metabolized by enzymes in the body.