The autonomic nervous system is also known as the nervous system because it involves involuntary actions in the smooth muscles, cardiac muscles, and glands

The Autonomic nervous system is also known as the Sympathetic and Para sympathetic nervous system. The Sympathetic nervous system (SNS) is best known for its stimulation of the body’s fight-or-flight (emergency) response, maintaining the body's homeostasis balance like sweating to disspation of heat. It is related more with activities that requires mental or physical alertness such as work and exercise. Conversely, the parasympathetic nervous system is responsible for "rest and recovery" or relaxation responses like sleeping, eating and watching TV. While the SNS increases heartbeat, and blood vessels; the parasympathetic nervous system decreases your heartbeat, relaxes your blood vessels and your muscles

The answer is reflection.