Question

12:57 Exit D Question 5 1 pts Myelination occurs quickly in humans during infancy, leading, e.g., to a child's fast motor development (crawling, walking -- those toddlers can move!) as the speed of voltage pulses through their neurons increases with myelination of those nerve fibers. However, there are a number of neurodegenerative diseases, such as multiple sclerosis and Guillain- Barre syndrome (which they mention when you get your flu shot), in which demyelination (loss of the myelin sheath insulating the nerves) occurs. The effective reduction of the membrane then leads to degradation or complete loss of nerve signals. If the capacitance of a membrane increases because of an effectively thinner membrane (degradation of the myelin sheath), but the resistances of the axon and its membrane do no change appreciably due to other effects, how would degradation of myelin affect the speed of a pulse? The speeurora puise would decrease.

Answer 1

Basically Myelin is the important reason or cause our nervous system operates so quickly and efficiently .Myelin is also called as membranous structure.

Myelin greatly increases the speed of impulses in neurons due to reason that it mostly insulates the axon and assembles voltage sodium channel clusters at nodes along its length.

Thus correct option is option - C ( i.e the speed of electrical impulse would increase )