Multiple Choice
Which of the following layers of the gastrointestinal tract wall contains the muscularis mucosae?
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23. The Digestive System
Introduction to the Digestive System
Multiple Choice
What is the primary function of the folds and villi in the small intestine?
A
To secrete digestive enzymes
B
To transport waste materials to the large intestine
C
To protect the intestinal lining from pathogens
D
To increase the surface area for nutrient absorption
Verified step by step guidance1
Understand the structure of the small intestine: The small intestine is a long, coiled organ where most of the digestion and absorption of nutrients occurs.
Identify the features of the small intestine: The inner surface of the small intestine is lined with folds, villi, and microvilli, which are small, finger-like projections.
Recognize the role of folds and villi: These structures significantly increase the surface area of the intestinal lining, allowing for more efficient absorption of nutrients.
Consider the function of increased surface area: By having a larger surface area, the small intestine can absorb more nutrients from the digested food as it passes through.
Conclude the primary function: The primary function of the folds and villi in the small intestine is to increase the surface area for nutrient absorption, enhancing the efficiency of the digestive process.
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