Adrenaline (also known as epinephrine) is a hormone released into the bloodstream in response to physical or mental stress like fear or injury.
This is a physiological reaction that occurs in response to perceived harmful events or threats to survival.
These are hormones that are released in response to stress; they prepare the body to respond to a threat.
A neurotransmitter and hormone involved in the body's stress response; it increases heart rate, releases glucose from energy stores and increases blood flow to skeletal muscle.