Which is not a function of the blood-brain barrier?
A. It protects brain neurons from exposure to abnormal hormone levels.
B. It protects brain neurons from exposure to abnormal ion levels.
C. It prevents brain neurons from being exposed to waste products in the blood.
D. It prevents nicotine and alcohol from entering brain interstitial fluid.
E. It prevents brain neurons from being exposed to drugs.
Answer: D
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Indicate whether the statement is true or false