Question 14

Ependymal cells function in creating cerebrospinal fluid.

Ependymal cells are specialized glial cells that line the ventricles of the brain and the central canal of the spinal cord, playing a crucial role in the production and circulation of cerebrospinal fluid (CSF).

A) Astrocyte

Astrocytes are a type of glial cell that provide support and nourishment to neurons, maintain the blood-brain barrier, and regulate blood flow in the brain. However, they do not directly produce cerebrospinal fluid, making this option incorrect.

B) Microglia

Microglia serve as the immune cells of the central nervous system, responsible for removing debris and responding to injury or disease. Although they are essential for brain health, they do not have a role in the production of cerebrospinal fluid, thus rendering this option incorrect.

C) Ependymal cells

Ependymal cells are responsible for the production and circulation of cerebrospinal fluid. They line the ventricular system of the brain and have cilia that help move the CSF, making this option the correct answer.

D) Oligodendrocyte

Oligodendrocytes are responsible for forming the myelin sheath around axons in the central nervous system, which facilitates the rapid transmission of electrical signals. They do not participate in the production of cerebrospinal fluid, making this option incorrect.

Conclusion

Ependymal cells are the only glial cells among the options provided that are directly involved in the creation and circulation of cerebrospinal fluid. All other options represent different types of glial cells with distinct functions that do not include CSF production, confirming that ependymal cells are the correct answer.