During fight-or-flight response, the sympathetic nervous systems stimulate the adrenal glands triggering the release of catecholamines, which include adrenaline and noradrenaline.
It controls all parts of the body. It receives and interprets messages from all parts of the body and sends out instructions. The three main components of the central nervous system are the brain, spinal cord and neurons.
There main function is to help with your peripheral vision.
