What is the role of cerebrospinal fluid in the central nervous system?

Cerebrospinal fluid (CSF) plays a significant role in the central nervous system by surrounding and protecting the brain and spinal cord. This clear fluid acts as a cushioning barrier, which helps absorb shocks from impacts and reduces the risk of injury to these critical structures. Additionally, CSF maintains a stable environment for brain function by regulating intracranial pressure and ensuring proper electrolyte balance. It also assists in the removal of waste products from the central nervous system. This protective layer is integral to the overall well-being of the neurological system, safeguarding it against physical trauma and contributing to homeostasis. In contrast, the other options relate to functions that are not primarily associated with cerebrospinal fluid; for instance, storing genetic information pertains to DNA in the nucleus of cells, nutrient supply is primarily the role of blood circulation, and signal transmission is carried out by neurons through electrical impulses rather than being a function of CSF.