What key role does cerebrospinal fluid play in the central nervous system?

What key role does cerebrospinal fluid play in the central nervous system?

• A. It transports hormones to the brain
• B. It delivers nutrients to neurons
• C. It supports and protects the brain and spinal cord
• D. It regulates nerve impulses

Answer: (C)

Cerebrospinal fluid (CSF) plays a vital role in the central nervous system by supporting and protecting the brain and spinal cord. It fills the spaces within and around the brain and spinal cord, creating a cushioning effect that absorbs shock and reduces the risk of injury from impacts or sudden movements. This buoyancy also helps to maintain the shape and position of the brain within the skull, preventing it from pressing against the hard bone of the cranium, which can lead to damage.

CSF also aids in maintaining the appropriate chemical environment for neuronal function, although its primary role in defense and protection is paramount. The circulation of CSF helps remove metabolic waste products from the central nervous system, contributing to homeostasis. This protective function is essential for the well-being of the delicate neural tissues, ensuring that they can perform their functions effectively without the risk of damage from mechanical forces or fluctuations in pressure.