Question

as food is being digested, it moves from the mouth to the stomach to the small intestine. in peters small intestine, some of the cells make lactase. in the small intestine, small molecules like glucose are absorbed into the blood. the blood carries glucose to all the cells in the body. disaccharides like lactose are too large to be absorbed into the blood. 5. below the figure, write gg to show where lactose is broken down to glucose and galactose, which are absorbed into the blood. 6a. when peter drinks a glass of milk, lots of lactose reaches his stomach. however, very little lactose reaches his large intestine. explain why. where did the lactose go? 6b. the cells in marias small intestine make very little lactase - only enough to digest the lactose in a small glass of milk. if maria drinks a large glass of milk, what do you think happens to most of the lactose molecules in the milk?

Explanation:

5.

The text mentions that in the small intestine, lactase (made by some cells) breaks down lactose. Also, small molecules like glucose (a product of lactose breakdown) are absorbed in the small intestine.

Lactose is a disaccharide. In the small intestine, lactase (an enzyme) breaks lactose into glucose and galactose (smaller molecules). These smaller molecules can be absorbed into the blood (as stated in the text that small molecules are absorbed in the small intestine).

Since Maria has only enough lactase for a small - glass of milk's lactose. For a large - glass, there isn't enough lactase to break down all the lactose. Disaccharides (like lactose) are too large to be absorbed. So, the undigested lactose will move to the large intestine.

Answer:

GG should be written below the small intestine label.

6a.