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.
Analogy
Adrenaline is like your body's emergency alarm system. When you're in danger, it sounds the alarm, preparing your body for action by increasing heart rate, blood pressure and energy supplies (the fight-or-flight response).
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.
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