Norepinephrine

Definition

Norepinephrine is both a hormone and neurotransmitter involved in stress response; it increases heart rate, releases glucose from energy stores, and increases blood flow to skeletal muscle.

Related terms

Fight-or-Flight Response:

A physiological reaction that occurs in response to threat to life.

Adrenaline:

Also known as epinephrine, a hormone secreted by adrenal glands, enhancing heart rate, metabolic rate and respiration (similar function as norepinephrine).

Stress Hormones:

Hormones that are released during stressful situations including adrenaline and cortisol.