epinefrina

Epinefrina, also known as adrenaline, is a hormone and neurotransmitter produced by the adrenal glands and certain neurons in the central nervous system. It plays a crucial role in the body's "fight-or-flight" response, preparing the body for strenuous physical activity. When a person experiences stress or excitement, the brain signals the adrenal glands to release epinefrina.

This release triggers a cascade of physiological changes. Heart rate increases, blood pressure rises, and blood flow is redirected to the muscles and brain, while digestion temporarily slows. Blood sugar levels also rise as the liver releases stored glucose, providing immediate energy. These effects are designed to enhance survival in perceived dangerous situations.

Medically, epinefrina is a vital medication used to treat life-threatening allergic reactions, such as anaphylaxis. It acts as a bronchodilator, opening up airways, and constricts blood vessels, helping to raise blood pressure and reduce swelling. It is also used in cardiac arrest to stimulate the heart and in certain anesthetic procedures to prolong the effect of local anesthetics. Epinefrina is administered via injection and its effects are rapid but short-lived. Its dual role as a natural body chemical and a critical medical intervention highlights its importance in both physiological regulation and emergency care.