An electrical signal travels down a neuron's axon, which is coated in an insulating fatty substance. This insulation is not continuous; it has small, regularly spaced gaps. What is the primary functional consequence of these gaps for the electrical signal?

Multiple Sclerosis

Imagine two neurons of the same length are tasked with sending an electrical signal. Neuron A's axon is coated with a thick, fatty substance that acts as an insulator. Neuron B's axon lacks this coating. Which of the following statements most accurately predicts the functional difference between these two neurons?

Neural Signal Transmission Impairment

Neurological Effects of Phenylketonuria (PKU)