Reflex Arc

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  • Created by: Abbi
  • Created on: 04-05-13 11:12
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  • Reflex Arc
    • reflex action - touching something hot and moving the hand away.
    • Features- fast, involentory and instinctive.
    • stimulas
      • Hot surface
      • Receptors
        • Sensory Neurone
          • Relay Neurone
            • Motor Neurone
              • Effector
                • Responce
                • The thing that brings about change
                • E.G Biceps, musle etc
              • Message travels away from the CNS by the...
            • The CNS travels along it by the...
          • message sent alone the...
        • E.g pain/thermoreceptors in the skin
    • Along a neurone the message is electrical
    • In a synapse the message is chemical
    • Things you also need to label.
      • ganglion
        • a group of cell bodies
      • central canel
        • contains CSF - ceribral spinal fluid
      • dorsal root
        • goes IN
          • goes OUT
      • ventral root
        • goes OUT
      • White matter
        • Made up of mylinated axons
      • Grey matter
        • Made up of cell bodies, dendrites, unmylinated axons etc
        • White matter
          • Made up of mylinated axons
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