Neurons

Cards (13)

  • Cell body
    • Dendrites
    • Axon
  • Sensory neurons

    • Carry electrical impulses towards the brain
    • Found in the PNS
  • Sensory neurons
    • Have long dendrites
    • Have short axon
  • Relay neurons

    • Have cell body
    • Carry signals
    • Allow sensory and motor neurons to communicate
  • Relay neurons are only found in the brain/visual system/spinal cord
  • Relay neurons
    • Have short dendrites
    • Have short axons
    • Do not have a myelin sheath
  • Motor neurons
    Carry Motor commands FROM the CNS to EFFECTORS (skeletal muscles/organs/gland) which allows for movement
  • Motor neurons
    • Have short dendrites and long axons (for sending messages)
    • Cell bodies are in the CNS
    • Have long axons that also connect to the PNS
  • sensory, relay and motor neurons work together
  • For example, if someone picks up a hot pan and then drops it
  • SENSORY receptors in the fingers sense the heat and send that information via the peripheral nervous system to the CNS
  • RELAY
    neurons would be involved in analysing the sensation of heat and pain, and are involved in the decision to let go - passing messages to the
  • MOTOR
    neurons which instruct the effectors to let go of the hot pan