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68D 101 Operating Room Specialist Practice Test

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What has numerous, short, hairlike projections that extend from the surface of the cell, and moves fluid along a cell's surface?
Correct Answer:
Cilia
Explanation:
Focus on how different surface extensions function. Cilia are numerous, short, hairlike projections that cover the cell surface and beat to move fluid across the surface. This makes them the best fit for moving mucus or other substances along the cell’s exterior, as seen in the respiratory tract. Microvilli are even smaller projections that increase surface area for absorption and secretion and don’t propel fluid. Flagella are longer and fewer, used to propel the entire cell, like a sperm tail. Centrosomes are internal organizers of the cytoskeleton and do not extend outward as surface projections.

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