Which of the following axons would have the fastest conduction velocity?
A) diameter = 5 microns, unmyelinated
B) diameter = 20 microns, myelinated
C) diameter = 5 microns, myelinated
D) diameter = 1 micron, myelinated
E) diameter = 20 microns, unmyelinated

Question

Quizplus · Accepted Answer

Axon conduction velocity is influenced by both the diameter of the axon and the presence of myelination. Larger diameter axons conduct signals faster due to less internal resistance, and myelination significantly increases conduction velocity by allowing saltatory conduction. Therefore, a myelinated axon with a large diameter (20 microns) would have the fastest conduction velocity.

Which of the Following Axons Would Have the Fastest Conduction