Epinephrine

Definition

Epinephrine, also known as adrenaline, is a hormone and neurotransmitter produced by the adrenal glands that plays a crucial role in the body's fight-or-flight response by increasing heart rate, muscle strength, blood pressure, and sugar metabolism. It prepares the body for rapid action in situations perceived as stressful or dangerous.

Related terms

Adrenal Glands: These are endocrine glands located above the kidneys that produce vital hormones including epinephrine and cortisol.

Fight: or-Flight Response - This is a physiological reaction that occurs in response to a perceived harmful event, attack, or threat to survival, priming the body for quick action.

Neurotransmitter: A chemical substance released at the end of a nerve fiber by the arrival of a nerve impulse and, by diffusing across the synapse or junction, causes the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure