Vesicles to Ventricles: Blood Supply and CSF

Question 1

CSF is made by the _____________.

Answer 1

choroid plexus

Question 2

How much CSF is in the brain and spinal cord?

Answer 2

125 mL

Question 3

What does CSF pass through to get out of the CNS?

Answer 3

Arachnoid granulations

Question 4

How much CSF is made daily?

Answer 4

500 mL

Question 5

__________ cells lack glycogen.

Answer 5

Neuronal

Question 6

The anterior circulation arises from the __________.

Answer 6

internal carotid

Question 7

The posterior circulation arises from the __________.

Answer 7

vertebral

Question 8

What are the only two areas of the cerebrum that are supplied by the vertebral arteries?

Answer 8

The medial part of the occipital lobe and the interior part of the temporal lobe

Question 9

The vertebral arteries supply the _________.

Answer 9

cerebellum and brainstem (as well as the parts of the cortex mentioned in another card)

Question 10

The anterior cerebral artery supplies the _____________.

Answer 10

medial half of the anterior 2/3 of the cerebrum

Question 11

The middle cerebral artery supplies the ____________.

Answer 11

lateral half of the anterior 2/3 of the cerebrum

Question 12

The __________ artery gives off many small branches that supply the deeper portions of the brain.

Answer 12

middle cerebral

Question 13

List the blood flow from the vertebral artery through its branches.

Answer 13

Heart -> aortic arch -> subclavian -> vertebral -> spinal arteries -> PICA -> AICA -> basilar -> superior cerebellar -> posterior cerebral -> posterior communicating -> middle cerebral -> internal carotid -> anterior cerebral

Question 14

The inferior sagittal sinus drains to the _________.

Answer 14

straight sinus

Question 15

Blood flows from the sinus confluens to the internal jugular via the _____________.

Answer 15

transverse sinus and then sigmoid sinus

Question 16

The pia mater is ___________ cell(s) thick.

Answer 16

one

Question 17

The lateral ventricles communicate with the third ventricles through the _____________.

Answer 17

interventricular foramen

Question 18

The ___________ connects the third ventricles to the fourth ventricles.

Answer 18

cerebral aqueduct

Question 19

How many apertures connect the fourth ventricles to the subarachnoid space?

Answer 19

Three (two lateral and one caudal)

Question 20

CSF in the ventricles freely mingles with the cerebral extracellular space through the _________, a single layer of cells that lines the ventricles.

Answer 20

ependyma

Question 21

Explain the unique tight-junction setup in the choroid plexus.

Answer 21

The brain capillaries lose their tight junctions and the ependymal cells gain tight junctions so that plasma can leaks out of the capillaries, but it must still be pumped actively into the ventricles.

Question 22

Differentiate communicating and non-communicating hydrocephalus.

Answer 22

Non-communicating hydrocephalus results from blockages in inter-ventricular foramen or the cerebral aqueduct, while communicating hydrocephalus results from failure of CSF to resorb through the arachnoid granulations to the superficial cerebral veins.

Question 23

Between what two layers do the superficial cerebral veins lie?

Answer 23

The pia and arachnoid

Question 24

Where is the fourth ventricle?

Answer 24

Between the pons and the cerebellum