Electrical wires are generally protected by a tube of plastic. A similar insulating function is performed in the nervous system by a:

Question

Quizplus · Accepted Answer

The myelin sheath is a layer of fatty tissue that surrounds and insulates axons in the nervous system, similar to how plastic tubes protect electrical wires. This insulation helps to increase the speed and efficiency of neural impulses. Glial cells, terminal buttons, and synapses all play important roles in the nervous system, but they do not directly perform an insulation function like the myelin sheath.

Electrical Wires Are Generally Protected by a Tube of Plastic