In the context of neurons, which of the following statements is true of the myelin sheath?
A) It is a layer of fat cells that insulates axons and helps electrical signals travel faster down the axon.
B) It is a fiber that carries signals away from the cell body of a neuron.
C) It is a fiber that carries signals toward the cell body of a neuron.
D) It releases chemicals called neurotransmitters into synapses, which are tiny gaps between neurons' fibers.

Question

Quizplus · Accepted Answer

The myelin sheath is a layer of fat cells that wraps around the axon of a neuron, insulating it and allowing electrical signals to travel faster down the axon. This is because the myelin sheath prevents the electrical signal from leaking out, forcing it to jump between small gaps in the myelin called nodes of Ranvier, which speeds up transmission.

In the Context of Neurons, Which of the Following Statements