Which of the Following is Most Descriptive of the Nodes

Question

Which of the following is most descriptive of the nodes of Ranvier?
A) Neurotransmitter-storing vesicles in the axon terminals
B) Exposed (unmyelinated) axonal membrane
C) Enlargements formed by a concentration of Schwann cells
D) Patches of blood vessels called the choroid plexus

Accepted Answer

Nodes of Ranvier are the small gaps found along the myelinated axon where the axonal membrane is exposed or unmyelinated. This allows for saltatory conduction, where the action potential jumps from node to node, increasing the speed of nerve impulses. The other options are not descriptive of the nodes of Ranvier.