The myelin wrapped around an axon serves:
A)as a special immune defense for the neuron.
B)to increase the efficiency of transmission of the neuron.
C)as a resistor that slows the speed of transmission of the neuron.
D)no functional purpose.

Question

Quizplus · Accepted Answer

The myelin sheath serves to increase the efficiency of transmission of the neuron by allowing faster and more efficient conduction of nerve impulses along the axon. It does this by insulating the axon and preventing the leakage of electrical currents which would slow down transmission. It also speeds up transmission by forcing the electrical current to jump from one node of Ranvier to the next, a process known as saltatory conduction.

The Myelin Wrapped Around an Axon Serves