Practice question · Select all that apply
Select every statement that is TRUE about the CNS.
Hints
- Two options are misconceptions - one overstates the barrier, one over-involves the brain.
- The barrier is selective (not total), and reflexes can finish in the cord alone.
Show the answer
- A. Cerebrospinal fluid is produced in the brain's ventricles.
- B. The pia mater is the innermost meninx.
- C. In the spinal cord, white matter lies outside and grey matter at the core.
Why
CSF is made in the ventricles, the cord has white-outside/grey-core layout, and the pia is innermost - all true. The barrier is selective (lipid-soluble molecules pass), and a reflex arc need not reach the brain, so those two are false.
Practise Central Nervous System
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