AP Biology : Digestive Anatomy

Study concepts, example questions & explanations for AP Biology

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Example Questions

Example Question #1 : Understanding The Lower Digestive Tract: Small Intestine To Rectum

What is the purpose of microvilli in the small intestine?

Possible Answers:

Increase surface area

Decrease contracility

Increase contractility

Decrease surface area

Correct answer:

Increase surface area

Explanation:

Microvilli are found at the microscopic level within the digestive tract to help increase surface area. The increased surface area aids in the absorption of nutrients as they pass through the small intestine. Microvilli allow for folds in the digestive tract, which in turn, increase the amount of area available for nutrient absorption.

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