What exactly is adrenaline?

See below. Epinephrine (also known as adrenaline or adrenalin) is a hormone and a neurotransmitter. Epinephrine has many functions in the body, regulating heart rate, blood vessel and air passage diameters, and metabolic shifts; Epinephrine release is a crucial component of the fight-or-flight response of the sympathetic nervous system.

Related Questions