The blood-brain barrier
A)Is formed by cells lining tiny blood vessels in the brain
B)Is present in all parts of the brain
C)Prevents entry of all lipid-insoluble molecules into the brain
D)Both is formed by cells lining tiny blood vessels in the brain and prevents entry of all lipid-insoluble molecules into the brain are correct
E)All of the choices are correct

Question

Quizplus · Accepted Answer

The blood-brain barrier is formed by endothelial cells lining the blood vessels in the brain. It selectively restricts the passage of substances, but not all lipid-insoluble molecules are completely prevented from entering.

The Blood-Brain Barrier