What fluid cushions and protects the CNS in the space between the meninges?

What fluid cushions and protects the CNS in the space between the meninges?

• A. Pia mater
• B. Arachnoid mater
• C. Cerebrospinal fluid
• D. Forebrain

Answer: (C)

Cerebrospinal fluid is the fluid that cushions and protects the central nervous system in the space between the meninges. It fills the subarachnoid space between the arachnoid mater and the pia mater, surrounding the brain and spinal cord. This fluid provides buoyancy to reduce the brain’s effective weight, acts as a shock absorber, and helps maintain a stable chemical environment. It’s produced by the choroid plexuses, circulates through the ventricles and subarachnoid space, and is reabsorbed into the bloodstream via arachnoid granulations. The other options are a protective membrane or a brain region, not a fluid.

Cerebrospinal fluid is the fluid that cushions and protects the central nervous system in the space between the meninges. It fills the subarachnoid space between the arachnoid mater and the pia mater, surrounding the brain and spinal cord. This fluid provides buoyancy to reduce the brain’s effective weight, acts as a shock absorber, and helps maintain a stable chemical environment. It’s produced by the choroid plexuses, circulates through the ventricles and subarachnoid space, and is reabsorbed into the bloodstream via arachnoid granulations. The other options are a protective membrane or a brain region, not a fluid.