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Example Questions
Example Question #11 : Organs And Organ Systems
What are the areas of unmyelinated axon called on a neuron?
Possible Answers:
Schwann cells
Nodes of Ranvier
Gap junctions
Axonal gaps
Nissl bodies
Correct answer:
Nodes of Ranvier
Explanation:
The vast majority of neurons are myelinated (by Schwann cells in the peripheral nervous system and oligodendrocytes in the central nervous system) in order to allow for saltatory conduction, which greatly increases conduction speed. This occurs as the action potential "leaps" from one node of Ranvier to the next node of Ranvier rather than having to pass down the entire length of the axon.
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