The function of the blood-brain barrier is to
A) keep neurons from innervating blood vessels.
B) prevent all contact between bloodborne molecules and brain tissue.
C) help protect the central nervous system.
D) provide an impenetrable barrier between blood and brain, because the brain gets all its nourishment from the cerebrospinal fluid.

Question

Quizplus · Accepted Answer

The blood-brain barrier helps protect the central nervous system by preventing certain substances, such as toxins and pathogens, from entering the brain from the bloodstream. However, it does allow necessary nutrients and oxygen to pass through to support brain function.

The Function of the Blood-Brain Barrier Is to