Macrophages in nervous system is known as:: (A) Schwann cells, (B) Oligodendrocytes, (C) Astrocytes, (D) Microglia
Answer is D. Microglia are scavenger cells that resemble tissue macrophages and remove debris resulting from injury, infection, and disease (eg, multiple sclerosis, AIDS-related dementia, Parkinson disease, and Alzheimer disease). Microglia arise from macrophages outside of the nervous system and are physiologically and embryologically unrelated to other neural cell types. Ref: Ganong's Review of Medical Physiology 23rd edition, Chapter 4.