Final answer:
The conduction of an action potential along an axon is faster in myelinated nerve fibers because of saltatory conduction, not influenced by stimulus strength, and does not decrease in amplitude as it is propagated.
Step-by-step explanation:
The conduction of an action potential along an axon is not dependent on the strength of the stimulus; once the action potential threshold is reached, it will travel along the axon at a constant speed and amplitude. Therefore, it is false that it is faster for a strong stimulus than a weak one. The conduction is actually than in unmyelinated ones due to the process of saltatory conduction, where the action potential 'jumps' from node to node.
This is because myelin sheaths act as insulators, allowing the action potential to propagate quickly, while unmi yelinated fibers conduct the signal more slowly through continuous conduction. Additionally, the action potential does not decrease in amplitude as it is propagated along the axon; it maintains its strength due to the all-or-nothing principle of action potential propagation. Therefore, the accurate statement among the options is 2) faster in unmyelinated nerve fibers than in myelinated nerve fibers.