Professor Kendell Is Explaining How Neurons Work

Professor Kendell is explaining how neurons work.He uses the metaphor of an electrical cord to explain neuron structure.Like the wires inside the electrical cord,he says,the ___________ carries the neuron's electrical message;like the rubber protecting the cord's wires,the neuron's _____________ ensures that the signal goes where it's supposed to.

A) axon;myelin sheath
B) neurotransmitter;soma
C) dendrite;axon terminal
D) node of Ranvier;myelin sheath