Question: how does myelin sheath affect action potential?
Answer: Increased Conduction Velocity as a Result of Myelination. ... By acting as an electrical insulator, myelin greatly speeds up action potential conduction (Figure 3.14). For example, whereas unmyelinated axon conduction velocities range from about 0.5 to 10 m/s, myelinated axons can conduct at velocities up to 150 m/s.