What is the function of cerebrospinal fluid?

What is the function of cerebrospinal fluid?

• A. Cushion and protect the brain and nervous tissues
• B. Provide oxygen to neural tissue
• C. Store metabolic wastes
• D. Transmit nerve impulses

Answer: (A)

Cerebrospinal fluid mainly serves as a protective, buoyant cushion around the brain and spinal cord. By circulating in the ventricles and subarachnoid space, it surrounds neural tissue and reduces the effective weight of the brain, protecting it from minor impacts and providing a stable environment. While CSF does help clear waste and maintain chemical balance, its primary role is physical protection and buoyancy, not supplying oxygen or transmitting nerve signals. Oxygen for neural tissue comes from blood, metabolic wastes are handled by circulation and clearance systems rather than CSF storing them, and nerve impulses are transmitted by neurons, not by CSF.

Cerebrospinal fluid mainly serves as a protective, buoyant cushion around the brain and spinal cord. By circulating in the ventricles and subarachnoid space, it surrounds neural tissue and reduces the effective weight of the brain, protecting it from minor impacts and providing a stable environment. While CSF does help clear waste and maintain chemical balance, its primary role is physical protection and buoyancy, not supplying oxygen or transmitting nerve signals. Oxygen for neural tissue comes from blood, metabolic wastes are handled by circulation and clearance systems rather than CSF storing them, and nerve impulses are transmitted by neurons, not by CSF.