Chapter 13: Meninges, Ventricles, and CSF

Question 1

what are the two layers of the dura mater (the outermost meninge of the brain)

Answer 1

periosteal dura and the meningeal dura

Question 2

what are the dural venous sinuses and what do they do?

Answer 2

they form where the two layers of the dura mater separate and they function in draining the venous blood from the brain

Question 3

what are ventricals in the brain and how do they function?

Answer 3

spaces within the brain that are lined with ependymal cells which produce cerebral spinal fluid

Question 4

list the ventricles of the brain

Answer 4

lateral (separated by “septa pellucidum”

third (within diencephalon)

fourth (associated with pons and medulla oblongata)

Question 5

what parts of the brain connect the ventricles together?

Answer 5

interventricular foramina: joining lateral ventricles with third

cerebral aqueduct: continuous with the spinal cord

Question 6

what is cerebral spinal fluid and what is its function?

Answer 6

a clear fluid that surrounds the brain and spinal cord. It provides protection and cushion but also provides nutrients as it is packed with proteins

Question 7

what is the blood brain barrier and what are the three components?

Answer 7

endothelial cells (lining the capillaries) have tight junctions between them.

Astrocytes have foot processes that influence capillary permeability.

Basement membrane of endothelium