Adrenaline

Definition

Adrenaline (also known as epinephrine) is a hormone released into the bloodstream in response to physical or mental stress like fear or injury.

Related terms

Fight-or-Flight Response:

This is a physiological reaction that occurs in response to perceived harmful events or threats to survival.

Stress Hormones:

These are hormones that are released in response to stress; they prepare the body to respond to a threat.

Norepinephrine:

A neurotransmitter and hormone involved in the body's stress response; it increases heart rate, releases glucose from energy stores and increases blood flow to skeletal muscle.