Which of the following structures protect the brain by preventing the movement of harmful substances and pathogens from the blood into the brain tissue?
A)Dura mater
B)Arachnoid mater
C)Cerebrospinal fluid
D)Blood brain barrier
E)All of these choices

Question

Quizplus · Accepted Answer

The blood brain barrier is a protective barrier that prevents the movement of harmful substances and pathogens from the blood into the brain tissue. The dura mater and arachnoid mater are layers of tissues that surround the brain, but they do not provide a barrier against harmful substances. Cerebrospinal fluid also helps protect the brain, but it primarily serves as a shock absorber and provides nutrients to the brain, rather than acting as a barrier. Therefore, the best choice is D, blood brain barrier.

Which of the Following Structures Protect the Brain by Preventing