The action potential
A) travels along all axons at the same speed.
B) is slowed down in myelinated nerve cells.
C) is blocked at the nodes of Ranvier.
D) causes a brief depolarization of the membrane potential.
E) triggers a simultaneous change in potential along the entire axon.

Question

Quizplus · Accepted Answer

The action potential causes a brief depolarization of the membrane potential as it travels down the axon.

Answer: B
 Myelinated nerve cells have faster conduction of action potentials because the myelin sheath insulates the axon and allows the current to jump between nodes of Ranvier, where the membrane is exposed. This is known as saltatory conduction.

Answers A, C, and E are false.

The Action Potential