Outline the production / absorption (30% of marks), composition (30% of marks) and function of cerebrospinal fluid (CSF) (40% of marks).

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College Answer

This question was generally well answered. Better answers noted production including an amount, site and mechanism. Similarly, absorption included the site, the rate and factors which affect the rate. The electrolyte and pH and how they compare to extracellular fluid should have been included in the section on composition.