Which factors are most associated with the speed of nerve conduction?

Question

Quizplus · Accepted Answer

The factors most associated with the speed of nerve conduction are myelination and axon diameter. Therefore, the correct answer is:
c) myelination and axon diameter
Myelination refers to the presence of a myelin sheath around the axon, which is a fatty layer that insulates the axon and allows for faster transmission of electrical impulses. Nodes of Ranvier, which are gaps in the myelin sheath, enable saltatory conduction, where the action potential jumps from node to node, greatly increasing conduction velocity.
Axon diameter also plays a significant role in nerve conduction speed. Larger diameter axons have less resistance to the flow of ions within the axon and can conduct impulses more rapidly than smaller diameter axons.
While axon length can affect the time it takes for an impulse to travel from one end of the neuron to the other, it is not a primary factor in determining the speed of conduction. The resting membrane potential is crucial for the generation and propagation of action potentials, but it does not directly affect the speed of nerve conduction.

Which Factors Are Most Associated with the Speed of Nerve