- A The cerebral cortex, by neurons lining its outer surface
- B Choroid plexus inside the ventricles
- C The cerebellum, through its dense layer of granule cells
- D The spinal cord, by glial cells lining the central canal
Correct answer: B. Choroid plexus inside the ventricles
Explanation: CSF is produced by the choroid plexus in the brain ventricles. It circulates around brain and spinal cord, providing cushioning and nutrients.
Concept context
Brain, spinal cord, neurons, reflex arcs, and sense organs.