147.A 45-year-old man presents at the neurology clinic with memory loss,
mood swings, and clinical depression. Laboratory results reveal a CD4 level of
170/mm^3 (normal range is 500–1200) and a CD4 percentage of 12% (normal
approximately 40%). His viral load is 12,000 copies/mL. He has previously
been treated for pneumocystis pneumonia. The cells in the accompanying
photomicrograph, labeled with anti-GFAP, are involved in the progress of this
disease. These cells function to do which of the following?
236 Anatomy, Histology, and Cell Biology
a. Form synaptic contacts with neurons
b. Present antigen
c. Phagocytose dying neurons
d. Form a glial scar following damage
e. Form myelin in the CNS