Challenge Questions 39. Describe the general arrangement of cell bodies and axons in the central and peripheral nervous systems. 40. Compare and contrast the locations and functions of Schwann cells and oligodendrocytes. 41. What are the advantages of having several dendrites associated with one cell body, as is the case with multipolar neurons? 42. Histological examination of axons shows that, at the nodes of Ranvier, the diameter of the axon increases. What purpose might this increase in diameter serve?.