which part of the nervous system is involved in flight or flight
When your body perceives something as a stress (read: your nerve system senses a stressor), it sends signals to release hormones. These signals are controlled by a part of the nerve system called the sympathetic nervous system. Adrenalin and noradrenaline, also known as epinephrine and norepinephrine, along with cortisol are the initiators of a system-wide stress response in your body. Fight-or-Flight, Rest and Repair, and Your Nerve System.