Following a stroke, injury to nerve cells within the central nervous system needs to be repaired. The health care provider knows that which of the following processes explains how this occurs?

Question

A) Astrocytes fill up the space to form a glial scar, repairing the area and replacing the CNS cells that cannot regenerate.
B) The microglia are responsible for cleaning up debris after cerebral infection, or cell death.
C) Ependymal cells are responsible for phagocytosis.
D) Oligodendrocytes are responsible for integrative metabolism.

Answer 1

Ans: A
Feedback:
Astrocytes are the largest and most numerous of neuroglia and are particularly prominent in the gray matter of the CNS. They form a network within the CNS and communicate with neurons to support and modulate their activities. Astrocytes are also the principal cells responsible for repair and scar formation in the brain. The microglia is a small phagocytic cell that is available for cleaning up debris after cellular infection or cell death. The ependymal cell forms the lining of the neural tube cavity, the ventricular system. The oligodendrocytes form the myelin in the CNS. Instead of forming a myelin covering for a single axon, these cells reach out with several processes, each wrapping around and forming a multilayered myelin segment around several different axons.