Which of the following describes a function of cerebrospinal fluid?
1. Maintain optimum ionic environment
2. Maintain pH homeostasis
3. Provide circulation for exchange of nutrients/wastes
4. Serve as a shock absorbing fluid system of spinal cord
5. Provide buoyancy of the brain

1, 2, 3, 4, 5 is the correct answer.

Explanation:

Cerebrospinal fluid is present in the spinal cord and it encompasses the brain.

The main functions of the Cerebrospinal fluid are

lysosomes contain a variety of enzymes, enabling the cell to break down various biomolecules it engulfs, including peptides, nucleic acids, carbohydrates, and lipids (lysosomal lipase). the enzymes responsible for this hydrolysis require an acidic environment for optimal activity. hope i !