The human cerebral cortex has a grayish-brown appearance because
A) the cortex contains many small blood vessels.
B) of the large number of dendrites contained in the cortex.
C) brain nerve membrane is uniformly gray in appearance.
D) many glial cells are located in the cortex.
E) the cortex contains many neuron cell bodies.
Answer: E
Rationale: The human cerebral cortex has a grayish-brown appearance because the cortex contains many neuron cell bodies.
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