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Your Brain
Stress
Sympathetic nerves: prepare the body for emergencies and stress by increasing the breathing rate, heart rate, and blood flow to muscles. These nerves become aroused as part of the fight-or-flight response, which is the body's natural reaction to real or imaginary danger.
The neurotransmitter that helps the body return to normal after a stress response is the noradrenaline. It is also used to raise blood pressure.
Stress response
Stress and anxiety are often used interchangeably but there are differences between the two. Stress is a response to an event that causes physiological stress in the body, while anxiety is a response to an event that causes psychological stress.
The Fight or Flight Response.
Self harm or yelling
Adrenaline <>< <--- fish :D
cortisol
The adrenal glands are chiefly responsible for the stress response in the body; however, the hypothalamus plays a role because it causes the pituitary gland to secrete hormones that travel to the adrenal glands initiating the stress response within the body. The adrenal gland is also known as emergency gland and releases more adrenaline under stress.
At first it responds by releasing a hormone from the adrenal glands called epinephrine and norepinephrine. These help to raise blood pressure and heart rate. Then if the stress continues, they release corisol.