The Cells Lining the Small Intestine Have Projections into the Lumen

question 45

Multiple Choice

The cells lining the small intestine have projections into the lumen of the intestine. These projections, combined with the highly folded layering of cells lining the lumen, function to:

• A)increase the passage rate of food.
• B)facilitate countercurrent exchange.
• C)increase the surface area.
• D)increase water retention.
• E)slow the nerve impulses that trigger peristalsis.

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