Which of the following is true about BBB? Select one: O a. It does not let any molecules from blood into the brain O b.

[answerhappygod]

Which of the following is true about BBB?
Select one:
O a. It does not let any molecules from blood into the brain
O b. The physical barrier is created by the Astrocytes
O c. The chemical barrier is caused by very tightly packed cells of the capillary walls in the brain
O d. In order to pass from blood into the brain, particles must first enter the cerebrospinal fluid.