Peripheral Nervous System

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Created by
jae.zb

Cards (8)

  • Peripheral nervous system
    Relay nerve impulses from CNS around body and back to CNS
  • Components of the peripheral nervous system
    • Somatic nervous system
    • Autonomic nervous system
  • Somatic nervous system
    controls muscle movement from effectors and receives info from sensory receptors
    • sensory neurons to CNS
    • motor neurons away from CNS
    • Basic reflexes
    • Voluntary actions – skeletal muscles
  • Autonomic nervous system
    • Control vital involuntary actions that work efficiently when not thought about eg breathing
  • Involuntary actions controlled by the autonomic nervous system

    • Breathing – running up flight of stairs or when sick
    • Digestion – stomach-ache
    • Heartbeat – running
  • Components of the autonomic nervous system
    • Sympathetic nervous system
    • Parasympathetic nervous system
  • Sympathetic nervous system
    • In responses that help deal with emergencies/fight or flight
    • Neurons to every gland and organ
    • Dilate pupils
    • Increased breathing and heart rate
    • Slows digestion
    • Relaxes bladder (inhibits urine)
  • Parasympathetic nervous system
    • Work w/ SNS by relaxing us once emergency has passed
    • Slows body down
    • Constricts pupil
    • Decrease breathing and heart rate
    • Increase digestion
    • Contracts bladder (decreases urination)
    • 'Rest and digest'