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Ependymal cells line many open cavities in the central nervous system (CNS). Ependymal cells have cilia on the side of the cell that face these openings. What is the most likely function of these ciliated cells?
1. exchange of nutrients between the circulatory system and neurons
2. act as macrophage cells to destroy microorganisms or neuronal debris
3. create myelin sheaths for CNS cells
4. movement and circulation of cerebrospinal fluid

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Answer:

The correct answer is option 4. "movement and circulation of cerebrospinal fluid".

Explanation:

Ependymal cells are a type of specialized epithelial cells that most likely have a function in the movement and circulation of cerebrospinal fluid, furthermore, ependymal cells are the ones that produce cerebrospinal fluid. Ependymal cells line the ventricular system of the central nervous system (CNS) and have cilia that help them to mobilize the cerebrospinal fluid that they produce.

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