A nurse explains that the intestinal villi are important because they primarily do which of the following?
Correct answer: B. Increase the surface area for absorption
- A. Store bile before meals
- B. Increase the surface area for absorption
- C. Produce hydrochloric acid for digestion
- D. Move food from the mouth to the stomach
Explanation
Villi and their microvilli greatly increase the surface area available for absorption in the small intestine. Bile is stored in the gallbladder, hydrochloric acid is produced by the stomach, and oesophageal peristalsis moves food to the stomach.
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About Digestive System
The digestive system covers the structure and functions of the alimentary canal from mouth to anus, along with the liver, gallbladder and pancreas. It explains mechanical and chemical digestion, the action of major enzymes, absorption through intestinal villi, and how digestion differs from absorption and assimilation.
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