What is the purpose of the blood-brain barrier?
A) Prevents passage of some chemicals into the central nervous system
B) Provides shock absorption for the brain and spinal cord
C) Produces myelin in the peripheral nervous system
D) Produces myelin in the central nervous system

Question

Quizplus · Accepted Answer

Surrounding the brain and spinal cord is a wall of connective tissue formed by astrocytes and blood vessels called the blood-brain barrier. This functions as a semipermeable membrane to prevent or slow down the passage of some chemicals and disease-causing organisms such as viruses from traveling from the blood into the CNS.

What Is the Purpose of the Blood-Brain Barrier