How does a nerve impulse travel along an axon?
A. By diffusion
B. By active transport
C. By facilitated diffusion
D. By saltatory conduction
Correct Answer: D.By saltatory
Explanation:
A nerve impulse travels along an axon by a process called saltatory conduction. This means that the impulse “jumps” from one patch of specialized membrane, called a node of Ranvier, to the next. This allows the impulse to travel much more quickly than if it had to travel the entire length of the axon in one go.