Which of the following describes one of the functions of cerebral spinal fluid?

Cerebrospinal fluid (CSF) plays a crucial role in the central nervous system, primarily by providing a protective cushion for the brain and spinal cord. One key function of CSF is to collect waste products that are secreted by brain cells. As neurons and glial cells perform their activities, they produce metabolic waste that needs to be cleared to maintain a healthy environment for brain function. CSF circulates around the brain and spinal cord, facilitating the removal of these waste products, which are then transported to the bloodstream for excretion. The ability of CSF to effectively collect and help remove these wastes is essential for preventing neurodegeneration and supporting overall cognitive health.

In contrast, while CSF does contribute to the nutrient supply for brain cells, it does not directly provide nutrients in the same way that blood does. It acts more as a medium for transport rather than a source of nourishment. Therefore, the understanding that CSF serves to collect waste is a key aspect of its function in maintaining the brain's homeostasis.