Adrenaline (epinephrine) and noradrenaline (norepinephrine) are hormones and neurotransmitters that play essential roles in the body’s response to stress and danger. 1. Adrenaline (Epinephrine):    – Definition: Adrenaline is a hormone produced by the adrenal glands in response to stress, excitement, or danger. It helps prepare the body for physical …