Protection of the CNS

Question 1

The blood brain barrier cannot stop what?

Answer 1

Fat-soluble compounds–just like the cell membrane

Question 2

What is the function of the blood brain barrier (bbb)?

Answer 2

isolates CNS neural tissue from general circulation

Question 3

What forms the blood brain barrier?

Answer 3

Tight cell junctions between endothelial cells

Question 4

What controls the blood brain barrier?

Answer 4

Astrocytes release chemicals that control the permeability of the endothelium

Question 5

Where does the BBB not exist?

Answer 5

places where hormones need to enter the blood stream (pituitary gland, pineal gland, hypothalamus)

Question 6

What is unique about the choroid plexus?

Answer 6

ependymal cells maintain brain-CSF barrier instead of BBB

Question 7

What are the ventricles of the brain?

Answer 7

Role in CSF production, formed by choroid plexus; 1st and 2nd most superior, 3rd medial, 4th inferior/anterior to the cerebellum

Question 8

What is the choroid plexus?

Answer 8

Blood capillary in the brain surrounded by ependymal cells that filter blood into CSF

Question 9

Where is the choroid plexus?

Answer 9

In the ventricles of the brain