Synapse functional junction between nerves where a nerve impulse is transmitted Myelin is a white, fatty material covering axons Neurilemma part of the Schwann cell external to the myelin sheath Nodes of Ranvier gaps in myelin sheath along the axon Oligodendrocytes produce myelin sheaths around axons...
3. An electrical impulse is sent down the axon to the synapse 4. Since the impulse can only travel on the exposed membrane it jumps from one node to the next along the length of the axon.5. When the electrical charge reaches the synapse a chemical or neurotransmitter is released into ...