What structural feature of the brain regulates the movement of materials from the blood into the brain?
A) Myelin sheath
B) Circle of Willis
C) Meninges
D) Blood-brain barrier

Question

Quizplus · Accepted Answer

The blood-brain barrier is a highly selective semipermeable border that separates the circulating blood from the brain and extracellular fluid in the central nervous system (CNS). It regulates the movement of ions, molecules, and cells between the blood and the brain, thus protecting the brain from potentially harmful substances and pathogens in the blood, while allowing essential nutrients to pass through.

What Structural Feature of the Brain Regulates the Movement of Materials