1.

Cerebrospinal fluid A. Is formed in the arachnoid granulations. B. Provides the brain with most of its nutrition. C. Protects the brain from injury when the head is moved. D. Has a lower pressure than that in the cerebral venous sinuses. E. Flow around the adult brain is around half a litre per day

Answer»

A. False It is formed in choroid plexuses by active and passive processes. 

B. False Most of the brain’s nutrition comes from the blood. 

C. True This is its main function and it does so through cushioning and buoyancy. 

D. False Its higher pressure allows drainage by filtration to the dural venous sinuses via the arachnoid villi. 

E. True This is about four times its volume. 



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