In the saltatory conduction of action potentials,the nerve impulses jump from one node of Ranvier to another.This occurs because
A) only the nodes contain neurotransmitters.
B) the nodes are very well insulated and conduct impulses rapidly.
C) jumping from node to node prevents the impulse from traveling backward.
D) jumping from node to node ensures that the impulse travels slowly and evenly.
E) the membrane regions between nodes are well insulated and cannot conduct electrical impulses.

Question

Quizplus · Accepted Answer

The membrane regions between nodes are covered with myelin, which acts as an insulator, preventing electrical impulses from traveling through these regions. This forces the impulses to jump from one node of Ranvier to the next, where the axon membrane is exposed and can conduct the impulse.

In the Saltatory Conduction of Action Potentials,the Nerve Impulses Jump