Question

choose the one that is not classified as glial cells.
○ microglia
○ astrocytes
○ oligodendrocyte
○ gray matter

Explanation:

Glial cells (neuroglia) include microglia, astrocytes, and oligodendrocytes, which support neurons. Gray matter is a tissue in the CNS (composed of neuron cell bodies, dendrites, etc.), not a glial cell.

Answer:

D. gray matter