The speed of nerve impulse transmission through the axon of a sensory neuron will be quickest in:
A)axons with a greater receptive field.
B)a small-diameter,unmyelinated axon.
C)axons that adapt to stimuli.
D)a large-diameter,myelinated axon.

Question

Quizplus · Accepted Answer

The speed of nerve impulse transmission is fastest in large-diameter, myelinated axons because myelin acts as an insulator, allowing the nerve impulse to jump from node to node rather than having to travel down the entire length of the axon. This is known as saltatory conduction and allows for faster transmission of signals.

The Speed of Nerve Impulse Transmission Through the Axon of a Sensory