How does the myelin sheath the neuron?

Myelin sheath increases the speed of electrical impulse along the nerve cells.

Explanation:

Myelin sheath is an insulting layer of proteins and fatty acids that are present around the nerves of brain and spinal cord.

Myelin sheath increases the speed of conduction of nerve impulse from one nerve cell to another cell. Myelin sheath is formed by the concentric wrapping of schwann cells around the axon. This sheath decreases axonal membrane capacitance and increases the conduction of nerve impulse.

well, i believe that the answer is 2. : 3