page 2

Question 1

formation and production of the CSF happen

Answer 1

All day long- composition carefully controlled

Question 2

The formation and production of the CSF is BY….

Answer 2

the choroid plexus

Question 3

The Choroid plexus is made of 2 special parts: which are cells working togethr to maintain blood CSF barrier. List the 2 parts of the Choroid plexus?

Answer 3

1. ependymal cells with TIGHT JUNCTIONS
   2.Special fenestrated capillaries- brings ions (Na+, K+), glucose, CO2, O2 to be filtered into CSF

Question 4

where is the choroid plexus found?

Answer 4

lateral, 3rd, 4th ventricles

Question 5

How much CSF made a day?
BUT how much CSF fill the whole system?

Answer 5

500 ml/day
150 ml
= turnover

Question 6

the CSF leave the ventricles gets into the ____________
How does it do this?

Answer 6

subarachnoid space

thru the median and lateral apetures in roof of the 4th ventricle then flows around outside brain and spinal cord

Question 7

then the CSF gets reabsorbed back into the

Answer 7

venous blood of the superior sagittal sinus thru the arachnoid granulations/villi

Question 8

IF the CSF circulation thru ventricles or arachnoid villi/ granulations not working this means

Answer 8

Hydrocephlaus which will increase head circunfrence in infants

Question 9

CSF is composed of

Answer 9

O2, Co2, glucose, ions,

Question 10

to test CSF it can be sucked out with a needle =

Answer 10

Lumbar puncture
between L3 + L4 OR L4 + L5
= Cauda Equina here