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

Question

Quizplus · Accepted Answer

The blood-brain barrier does not prevent nicotine and alcohol from entering the brain interstitial fluid; these substances can indeed cross the blood-brain barrier and affect brain function. The other options (B, C, D, E) are functions of the blood-brain barrier, which serves to protect the brain from various harmful substances and maintain a stable environment for neurons.

Which Is Not a Function of the Blood-Brain Barrier