Adrenaline, also known as epinephrine, is a stress hormone. It is also classified as a catecholamine.
Adrenaline: More Than Just a Stress Hormone
While primarily known as a stress hormone due to its role in the "fight-or-flight" response, adrenaline's classification goes deeper. It belongs to a group of hormones called catecholamines, which are produced in the adrenal glands.
Catecholamines: A Closer Look
Catecholamines are a family of neurotransmitters and hormones. Besides adrenaline (epinephrine), this group also includes:
- Norepinephrine (Noradrenaline): Involved in alertness and arousal.
- Dopamine: Associated with pleasure, motivation, and motor control.
The Fight-or-Flight Response
Adrenaline is released in response to stress, whether physical or mental. Its effects include:
- Increased heart rate
- Elevated blood pressure
- Increased breathing rate
- Enhanced muscle strength
- Increased glucose release from the liver, providing energy.
Adrenaline's Production
The medulla of the adrenal glands is the primary site of adrenaline production. However, some adrenaline is also produced in neurons within the central nervous system.
