Question

Which of the following neuroglia are associated with removing bacteria and viruses from the CNS?

Microglial

Schwann

Astrocyte

Oligodendrocyte

Eppendemal

Answer 1

Option 'A' (Microglial) is correct

Justification: The microglial type of neuroglia are the specialized phagocytic cells which rapidly protects the central nervous system (CNS) against foreign agents by releasing cytotoxic substances to kill the invading bacteria and viruses. They also can remove dead and damaged neurons.

Justification for incorrect options:

• Option 'B' is incorrect because Schwann are a type of neuroglia in the peripheral nervous system but NOT in the central nervous system.
• Option 'C' is incorrect because Astrocytic neuroglia performs functions in neurotransmission but not in the phagocytosis, in the central nervous system.
• Option 'D' is incorrect because Oligodendrocytic neuroglia performs function in the neuronal conduction and production of myelin sheath around the neurons of central nervous system but is not involved in the phagocytosis.
• Option 'E' is incorrect because Ependymal neuroglia are involved in lining the central cavities of brain and spinal cord but are not involved in the phagocytosis.

Thank you!