• The peripheral nervous system (PNS) consists of all the nervous tissue that lies outside the central nervous system.
  • Nerves of the PNS control basic physical functions such as heart rate, breathing, digestion, and sweat production.
  • The PNS has two divisions: the sensory division and the motor division.
  • The motor division is further divided into the somatic and autonomic nervous systems.
  • A reflex is a very rapid motor response that is not directed by the brain.
  • In a reflex, nerve impulses travel to and from the spinal cord in a reflex arc.
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