Question

multiple choice question
what regulates the passage of materials from the blood into the cerebrospinal fluid and the brain?
basal nuclei
pla matter
blood brain barrier
cranium

Explanation:

The blood - brain barrier is a highly selective semi - permeable border of endothelial cells that regulates the passage of materials from the blood into the cerebrospinal fluid and the brain. Basal nuclei are involved in motor control. Pia mater is a membrane covering the brain but not the regulator of material passage. Cranium is the skull bone which provides physical protection but not regulation of material passage.

Answer:

blood brain barrier