Neurons

• Function of neuron's

  To receive and send information around the body by sending signals both electrically and chemically.
• Sensory Neuron

  • Found in receptors like the skin, eyes, ears and tongue.
  • Connects the PNS to the CNS
• Relay Neuron

  • Found in brain and spinal cord
  • Connects other neuron's together allowing them to communicate
• Motor Neuron

  • Found in the CNS
  • Connect the CNS to organs, glands and muscles (effectors)
• Dendrites

  Receives impulses from neighbouring neuron's and carry signal towards the cell body.
• Axon

  Carries the signal away from the cell body down the neuron.
• Axon terminal

  Where the signal has to cross a synapse o the next neuron.
• Myelin sheath

  A fatty layer that surrounds the axon and speeds up transmission of signal.
• Cell body

  Contains the nucleus and the genetic material of the cell.
• Nodes of ranvier

  The gaps between the myelin sheaths. They speed up transmission by allowing the signal to jump across the gaps on axon.