3. Speed of transmission

• How is speed of transmission increased in a myelinated neurone? (Saltatory conduction)

  . The myelinated neurone contains Schwann cells (wrapped around the axon like a donut)

  . Schwann cells acts as an insulating layer

  . So A.Ps only happen at the nodes of Ranvier

  . Electrical impulses jump from node to node = saltatory conduction