Question

What is the role of myelin sheath in nerve impulse transmission?

• A. It insulates the axon and accelerates the nerve impulse transmission.
• B. It slows down the nerve impulse transmission.
• C. It inhibits the nerve impulse transmission.
• D. Has no specific role in nerve impulse transmission.

Answer 1

The correct option is A

It insulates the axon and accelerates the nerve impulse transmission.

Nerve impulses travel by movement of electric charges along a neuron. Myelin sheath is an insulator to electric charges and thus prevents mixing of impulses in the adjacent nerve fibres.