Question:

Which statement describes cerebrospinal fluid?

A. It maintains a stable ionic concentration in the brain.

Description of the Answer:

Cerebrospinal fluid (CSF) is a clear, colorless liquid that surrounds the brain and spinal cord. One of its crucial functions is to maintain a stable ionic concentration in the brain. This means that CSF helps regulate the chemical environment around the brain’s neurons, which is essential for proper neural function and overall brain health. By maintaining this stability, CSF ensures that the brain’s neurons can function optimally, which is critical for maintaining cognitive and neurological health.

Additionally, cerebrospinal fluid also has other important roles, such as cushioning the brain and spinal cord from mechanical shocks, removing waste products from the brain, and providing nutrients. However, the specific function highlighted in the question is its role in maintaining ionic balance.