Question

What is the function of the myelin sheath?

(a) The myelin sheath increases the insulation along the entire length of the axon.
(b) The myelin sheath increases the speed of action potential conduction from the initial segment to the axon terminals.
(c) The myelin sheath decreases the speed of action potential conduction from the initial segment to the axon terminals.

Answer 1

The myelin sheath increases the speed of action potential conduction from the initial segment to the axon terminals.

Step-by-step explanation:

The function of the myelin sheath is to increase the speed of action potential conduction from the initial segment to the axon terminals. The myelin sheath is a fatty substance produced by glial cells that coats the axon and acts as an insulator, preventing current from leaving the axon. This insulation increases the speed at which the electrical signal travels along the axon.