Peripheral Nervous System (PNS)

  • Created by: kenneyn14
  • Created on: 03-04-19 21:09
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  • The Peripheral Nervous System (PNS)
    • Autonomic Nervous System (ANS)
      • Antagonistic meaning it is made up of 2 systems which exert opposite on the same organ
        • parasympathetic and sympathetic
          • work in an equal but opposite manner to maintain a stable internal environment by homeostatius
          • stimulation of the sympathetic system prepares the body for action and energy expendature
            • characterised by an increased heart rate and blood pressure and blood diverted to skeletal muscle
          • After the excitement has passes the parasympathetic system kicks in and calms the body back down to 'normal' (rest and digest)
            • helps the body conserve resources and save energy
    • Somatic Nervous System (SNS)
      • Mostly controls voluntary actions
      • contains sensory and motor neurons
        • sensory neurons take impulses from the sense organs (receptor) to the CNS
        • Motor neurons take impulses from the CNS  to the muscles and glands (effectors)


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