Outline the production / absorption (30% of marks), composition (30% of marks) and function of cerebrospinal fluid (CSF) (40% of marks).
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.
Sakka, Laurent, Guillaume Coll, and Jean Chazal. "Anatomy and physiology of cerebrospinal fluid." European annals of otorhinolaryngology, head and neck diseases 128.6 (2011): 309-316.
Segal, Malcolm B. "The choroid plexuses and the barriers between the blood and the cerebrospinal fluid." Cellular and molecular neurobiology 20.2 (2000): 183-196.
Brown, P. D., et al. "Molecular mechanisms of cerebrospinal fluid production." Neuroscience 129.4 (2004): 955-968.