Question

multiple choice question
the myelin sheath is a spiral layer of _______ around a nerve fiber.
o muscle tissue
o dendrites
o insulation
o scar tissue

Explanation:

The myelin sheath is a fatty - like layer around nerve fibers that acts as an electrical insulator, speeding up nerve impulse transmission. It is not muscle tissue, dendrites, or scar tissue.

Answer:

C. insulation