Test - Digestive System

Question 1

5. Which process takes place in the large intestine?

Answer 1

Water is absorbed from undigested food pg. 71

Question 2

7. What organ stores bile?

Answer 2

Gall bladder pg. 71

Question 3

13. Where does digestion begin?

Answer 3

Mouth pg. 75

Question 4

14. What are the sharp teeth used for tearing food?

Answer 4

Canines pg. 72

Question 5

17. Which of the following organs is considered to be a part of the alimentary canal?

Answer 5

None of these pg. 71

Question 6

18. Which nutrients are made up of amino acids?

Answer 6

Proteins pg. 74

Question 7

25. What substance must be present for pepsin to work the best?

Answer 7

Hydrochloric acid pg. 72

Question 8

26. Where does the alimentary canal end?

Answer 8

Large Intestine pg. 75

Question 9

27. What structures enable the small intestine to absorb large amounts of nutrients?

Answer 9

Villi pg. 75

Question 10

28. Where does digestion of carbs begin?

Answer 10

Mouth pg. 72

Question 11

33. About half the different __________ that make up proteins are made inside the body.

Answer 11

Amino acids pg. 71

Question 12

36. Digestion begins in the stomach.

Answer 12

False; mouth pg. 72

Question 13

38. Most chemical digestion takes place in the small intestine.

Answer 13

True pg. 75

Question 14

40. Bacteria in the esophagus make vitamin K

Answer 14

True pg. 71

Question 15

48. In general, could organ C perform its function without organ B? Explain.

Answer 15

The small intestine would not be able to absorb the small nutrient molecules in the bloodstream pg.72

Question 16

49. Identify organ A and give its function.

Answer 16

Produces bile which helps break down fat particles. Pg. 71

Question 17

52. Name the structures that line organ C and describe their function. This means what is on the inside of this whole organ and what do these structures do.

Answer 17

The structures are villi. Nutrient molecules pass into cells on the surface of a villus and from there into blood vessels. The villi provide a large surface area for absorption. Pg. 75

Question 18

55. Explain in detail how your mouth helps digest food.

Answer 18

Mechanical digestion - Teeth (incisors) cut and tear (canines) food into smaller pieces. They (molars) also crush and grind food. Chemical digestion - saliva moistens food, making it easier to swallow. Saliva contains an enzyme salivary amylase that chemically breaks down starch into smaller sugar particles called maltose. The
tongue positions the food swallowing. Pg. 72