end of chapter quiz: chapter 14

Question 1

1. Which of the GI tract tissue layers is most responsible for peristalsis and segmentation?
   a. serosa
   b. muscularis
   c. submucosa
   d. mucosa

Answer 1

b

Question 2

2. The tissue layers of the GI tract are the:
   a. mucosa, submucosa, muscularis, and serosa
   b. mucosa, villi, and microvilli
   c. villi, microvilli, and muscularis
   d. serosa, mucosa, villi, and muscularis

Answer 2

a

Question 3

3. All of the following are found in saliva except:
   a. mucin
   b. salivary amylase
   c. pepsin
   d. bicarbonate

Answer 3

c

Question 4

4. Which of the following might be true of an individual unable
   to synthesize and secrete intrinsic factor?
   a. They would be unable to absorb adequate amounts of
   vitamin B12.
   b. They would be unable to digest lactose found in dairy
   products.
   c. They would be unable to absorb amino acids in the small
   intestine.
   d. They would be unable to digest and absorb triglycerides.

Answer 4

a

Question 5

5. Which of the following nutrients are digested within the small
   intestine?
   a. proteins
   b. lipids
   c. carbohydrates
   d. all of these choices

Answer 5

d

Question 6

6. The region of the digestive tract most responsible for absorption
   of nutrients is the:
   a. stomach
   b. small intestine
   c. large intestine
   d. liver

Answer 6

b

Question 7

7. Which of the following lists structures in order from smallest to
   largest?
   a. small intestine, folds, microvilli, villi
   b. villi, microvilli, folds, small intestine
   c. microvilli, folds, villi, small intestine
   d. microvilli, villi, folds, small intestine

Answer 7

d

Question 8

8. What do the enzymes pepsin, chymotrypsin, trypsin, and carboxypeptidase have in common?
   a. They are secreted and active within the stomach.
   b. They are pancreatic enzymes.
   c. They are secreted and active within the small intestine.
   d. They are enzymes that participate in protein digestion

Answer 8

d

Question 9

9. Once nutrients are absorbed into the circulatory system, the
   next major organ they pass through is the:
   a. heart
   b. liver
   c. kidneys
   d. brain

Answer 9

b

Question 10

10. What is the main role of the gallbladder?
    a. The production and secretion of bile.
    b. The concentration and storage of bile.
    c. The secretion of digestive enzymes and HCl.
    d. The secretion of bicarbonate and bile.

Answer 10

b

Question 11

11. Regarding the large intestine, which sentence is false?
    a. Peristaltic movements push feces forward.
    b. The colon represents most of its length.
    c. It absorbs the remaining nutrients and water.
    d. The internal anal sphincter can be controlled voluntarily

Answer 11

d

Question 12

12. The small blind-ended lymphatic capillary at the center of each
    villus is called:
    a. lacteal
    b. brush border
    c. jejunum
    d. gastric pit

Answer 12

a

Question 13

13. Which of the following statements about trans fats is correct?
    a. Trans fats are found in animal products such as meat and
    dairy.
    b. Trans fats will lower LDL cholesterol levels.
    c. Trans fats are produced by the hydrogenation of unsaturated
    fats in vegetable oils.
    d. Salmon, trout, and sardines are rich in healthy trans fats.

Answer 13

c

Question 14

14. Indicate the diet that would not provide all the essential amino
    acids.
    a. milk, fish, and poultry
    b. red meat, rice, and legumes
    c. eggs, fish, and fresh vegetables
    d. fresh vegetables and beans

Answer 14

d

Question 15

15. Which of the following is associated with celiac disease?
    a. inability to digest and absorb proteins in dairy products
    b. damage to the villi resulting from the consumption of wheat
    products
    c. erosion of the wall of the stomach and duodenum due to
    hyperacidity
    d. chronic constipation due to low intestinal motility

Answer 15

b