Question

question 8 of 10
which of the following would be the fastest axon at sending an action potential or nerve impulse?
thin diameter, unmyelinated axon
thin diameter, myelinated axon
thick diameter, unmyelinated axon
thick diameter, myelinated axon

Explanation:

Myelin acts as an insulator that speeds up the conduction of action potentials through saltatory conduction. A thicker axon has less resistance to the flow of ions (lower internal resistance), allowing for faster propagation of the action potential. So, a thick - diameter, myelinated axon combines the benefits of myelination (saltatory conduction) and reduced internal resistance (due to larger diameter) for the fastest nerve impulse transmission.

Answer:

Thick diameter, myelinated axon