Which statement best describes the choroid plexus?

Which statement best describes the choroid plexus?

• A. Absorbs CSF into the bloodstream.
• B. A vascular network that drains CSF.
• C. Specialized ependymal tissue that continually synthesizes cerebrospinal fluid.
• D. A layer that cushions the brain.

Answer: (C)

The choroid plexus is the specialized tissue within the brain’s ventricles that continually produces cerebrospinal fluid. It consists of ependymal cells wrapped around a rich network of blood vessels, forming the blood–CSF barrier and actively secreting CSF into the ventricular system. This production process keeps CSF circulating and helps maintain its composition and volume. This differs from absorption or drainage functions. Absorbing CSF into the bloodstream happens mainly through arachnoid granulations, not the choroid plexus. The choroid plexus isn’t a drainage pathway or a structural padding layer; its main role is generating CSF that cushions the brain and then circulates, with CSF ultimately being absorbed elsewhere.

The choroid plexus is the specialized tissue within the brain’s ventricles that continually produces cerebrospinal fluid. It consists of ependymal cells wrapped around a rich network of blood vessels, forming the blood–CSF barrier and actively secreting CSF into the ventricular system. This production process keeps CSF circulating and helps maintain its composition and volume.

This differs from absorption or drainage functions. Absorbing CSF into the bloodstream happens mainly through arachnoid granulations, not the choroid plexus. The choroid plexus isn’t a drainage pathway or a structural padding layer; its main role is generating CSF that cushions the brain and then circulates, with CSF ultimately being absorbed elsewhere.