What is the primary role of oligodendrocytes in the central nervous system (CNS)?

• A. Regenerate nerve cells
• B. Produce neurotransmitters
• C. Produce myelin
• D. Support neuronal growth

Answer: (C)

Oligodendrocytes play a critical role in the central nervous system by producing myelin, which is an insulating layer that surrounds the axons of neurons. Myelin is essential for the proper functioning of the nervous system, as it increases the speed of electrical impulses along the axon, facilitating faster communication between neurons. The myelination of axons enables more efficient signal transmission and is crucial for the overall functioning of neural circuits.

In addition to producing myelin, oligodendrocytes also help maintain the health of neurons by providing metabolic support and participating in the repair processes following injury. Their primary focus, however, is the formation and maintenance of myelin sheaths, which is fundamental to the efficiency and speed of neural transmission in the CNS.