'Question 1 1 pts Which three of the following six statements about the vertebrate digestive tract are TRUE? Choose all three correct answers: The secretions of the stomach are mainly basic while the secretions of the small intestine are mainly acidic: The small intestine is the major site of nutrient absorption; and has many structural specializations to maximize the absorption of nutrients_ Mechanical digestion of food occurs mainly in the small intestine: Some of the enzymes required for chemical digestion in the small intestine are secreted by the pancreas_ Salivary glands secrete substances such as bile and digestive enzymes into the small intestine: An important role of the large intestine is water re-absorption:'
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Step 1: The small intestine is the major site of nutrient absorption and has many structural specializations to maximize the absorption of nutrients. Show more…
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Match the feature of the digestive system on the left, with the region or combination of regions on the right. lumen of the mucosa has simple columnar epithelium secretes hormones to aid in digestion promotes digestion of carbohydrates mucosa contains microvilli lumen of the mucosa has stratified squamous epithelium mucosa secretes enzymes that digest food in its lumen contains the greatest diversity of digestive enzymes has a mucosa coated with mucus uses skeletal muscle to aid in digestion does not aid in absorption. 1. mouth 2. esophagus 3. stomach 4. small intestine 5. large intestine 6. at least 2 of the above but not all of the above 7. all of the regions of the GI tract
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Suman K.
Which of the following statements is false? a. Trypsin digests proteins in the small intestine. b. Enzymes on the brush border of the small intestine complete the digestion of carbohydrates. c. Free fatty acids are absorbed across the apical membranes of small intestinal epithelial cells. d. Approximately $10 \%$ of the world's adult population is lactoseintolerant. e. Bile is a mixture of wastes, $\mathrm{HCO}_{3}^{-},$ cholesterol, and amphipathic compounds.
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