Question

6 a physiologist testing signal transduction rates in two different nerve fibers notices that one fiber conducts signals much faster than the other. which is the most likely difference between the two? multiple choice the faster nerve fiber has more axons. the faster nerve fiber is myelinated and the slower one is not. the faster nerve fiber has more dendrites. the slower nerve fiber is myelinated and the faster one is not.

Explanation:

Myelination affects nerve signal conduction. Myelinated fibers (like in the peripheral nervous system, Schwann cells form myelin sheaths) have saltatory conduction. The action potential jumps from one node of Ranvier (unmyelinated gaps) to another, which is faster than continuous conduction in unmyelinated fibers. Axons are the part of the neuron that transmits the signal away from the cell body, and having more axons doesn't directly explain the speed difference here. Dendrites receive signals, not transmit them over long distances for speed - related differences.

Answer:

The faster nerve fiber is myelinated and the slower one is not.