Electrical wires are generally protected by a tube of plastic. A similar insulating function is performed in the nervous system by:
A) myelin
B) glia
C) nodes of Ranvier
D) vesicles

Question

Quizplus · Accepted Answer

Myelin serves as an insulating layer around axons in the nervous system, similar to the plastic insulation around electrical wires. This insulating function helps to speed up nerve impulses and prevent electrical signals from being lost or interrupted. Glia, nodes of Ranvier, and vesicles do not perform this type of insulating function.

Electrical Wires Are Generally Protected by a Tube of Plastic