Question

Which of the following is an effect of myelination?

A) Myelination increases the rate at which phagocytosis occurs in the brain.
B) Myelination increases the speed of conduction of action potentials.
C) Myelination increases the rate of mitosis in damaged neurons.
D) Myelination increases the volume of cerebrospinal fluid in circulation.

Answer 1

Answer:

B) Myelination increases the speed of conduction of action potentials.

Explanation:

Myelination can be defined as  the process of formation of  myelin sheath around a nerve to allow nerve impulses to move more quickly.

Myelin is a fatty substance  that is rich in lipid which surrounds nerve cell axons to insulate them and increase the rate at which information  that are encoded in form of electrical impulses are passed along the axon.

Generally, myelin increases the transmission of electrical impulses called action potentials along myelinated axons by insulating the axon and reducing axonal membrane capacitance.