Norepinephrine (Noradrenaline)

Norepinephrine, also called noradrenaline, is a chemical messenger in the body that plays a key role in the fight-or-flight response. It is released by the nervous system to prepare the body for action by increasing heart rate, blood flow to muscles, and alertness. It also helps regulate mood and attention. Norepinephrine is produced mainly in the brain and adrenal glands, acting both as a hormone and a neurotransmitter. Its balanced function is essential for responding to stress and maintaining overall mental and physical alertness.