21. Dietary fiber is beneficial because it

a. is high in nutrients.

b. is readily digested.

c. adds bulk to feces.

d. absorbs excess nutrients.

22. The sum total of all the chemical changes that an organism performs to maintain its life and produce energy is the result of

a. metabolism.

b. digestion.

c. absorption.

d. respiration.

23. Bile contains

a. hormones.

b. enzymes.

c. plasma.

d. emulsifiers.

24. Two organs that work with the small intestine in digestion are the

a. liver and kidneys.

b. stomach and large intestine.

c. pancreas and liver.

d. large intestine and colon.

25. Conversion of amino acids to glucose is called

a. metabolism.

b. glycogenosis.

c. gluconeogenesis.

d. catabolism.

26. The surface of the intestinal wall has mucosal folds, villi, and microvilli to

a. aid in peristalsis.

b. increase the surface area for absorption.

c. decrease the surface area for absorption.

d. increase the number of enzyme-secreting cells.

27. Ways to minimize formation of stomach gas include

a. avoiding caffeine.

b. chewing with your mouth open.

c. drinking liquids through a straw.

d. not gulping.

28. A beverage that may cause intestinal gas in adults is

a. milk.

b. coffee.

c. apple juice.

d. cola.

29. Ms. J. complains of gas and bloating along with abdominal pain, especially after drinking milk or eating ice cream or cheese. She may have

a. lactose intolerance.

b. phenylalanine intolerance.

c. calcium deficiency.

d. vitamin D deficiency.

30. Which of the following foods would require peptidases to assist in its chemical digestion?

a. chicken.

b. banana.

c. orange juice.

d. margarine.