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Physiology

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Central Nervous System

Question
7 out of 10
 

All the following are more in CSF compared to plasma except (LQ)



A Mg
B Cl
C HCO3
D Glucose

Ans. D Glucose

CSF: ­

  1. CSF has more concentration than plasma for following:

CSF

Plasma

(a) Mg++ (meq/Kg H2O) Q

2.2

1.6

(b)Cl- (meq/kg H2O) Q

113.0

99.0

(c) HC03- (meq/L) Q

25.1

24.8

(d) PC02 (mmHg) Q

50.2

39.5

(c) creatinine (mg/dL) Q

1.5

1.2

2. pH of CSF = 7.33 Q

3. Osmolality of CSF is equal to the plasma = 289 mOsm/kg/H2O Q

4. Glucose of CSF = 6.4 mg/dL (or 2/3rd of plasma) Q

5. protein of CSF = 20mg/dL (Plasma protein = 6 ~m/dL) Q

6. Lumbar CSF pressure normally 70-180 mm H2o CSF Q

7. At a pressure of 112 mm H2o CSF, filtration and absorption of CSF are equal.

8. Below 68mm H2o CSF pressure absorption stops.

9. Total volume of CSF 150ml and the rate of CSF production is about 550 ml/day