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What causes lactose intolerance in humans?

Lack of glucose in the adult intestine
Lack of lactase in the adult intestine
Lack of lactose in the adult intestine
Lack of lactase in the infant intestine

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Casey Durgan
Casey DurganLv2
28 Sep 2019
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state one possible hypothesis that can explain the global distribution of lactase persistence (lactose tolerance)and lactase nonpersistence (lactose intolerance).be sure to include the following key words in your explanation. selection ' fitness 'survival.

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1. Which three are all monosaccharides? A. fructose, galactose, lactose B. maltose, sucrose, lactose C. glucose, fructose, sucrose D. glucose, fructose, galactose

2. What is the relative amount of carbohydrate digestion that takes place in the mouth, the stomach and the small intestine? A. Mouth: a little Stomach: none Small intestine: most B. Mouth: none Stomach: a little Small intestine: most C. Mouth: most Stomach: a little Small intestine: none D. Mouth: none Stomach: most Small intestine: a little

3. Many adults are lactose intolerant. What causes this? A. Lactose provokes an autoimmune response that irritates their intestinal lining. B. They break down and absorb lactose, thereby depriving the bacteria in the colon of lactose as an energy source. C. They can't break down and absorb lactose, so the bacteria in their colon digest the lactose instead. D. Lactose binds to the cells of their intestinal wall, blocking the absorption of other nutrients.

4. Compared with animal fats, in general, vegetable oils contain a higher proportion of A. unsaturated fatty acids. B. cholesterol. C. trans-fatty acids. D. saturated fatty acids.

5. Trans fatty acids are found in A. all plant fats/oils. B. all fats/oils. C. all animal fats. D. hydrogenated oils.

6. Cholesterol made in the liver travels to body cells in A. Micelles B. High density lipoproteins (HDLs) C. Low density lipoproteins (LDLs) D. Chylomicrons

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