Practice Questions on the Digestive System
Page 4

  1. A protein molecule will be hydrolyzed by enzymes secreted from the:
    1. Mouth, stomach, small intesine, liver
    2. Stomach, pancreas, small intestine
    3. Stomach, small intestine, liver
    4. Mouth, pancreas, colon

  2. Carbohydrates are acted on by:
    1. Trypsin, chymotrypsin, and enterokinase
    2. Amylase, maltase, and sucrase
    3. Lipase
    4. Hexokinase, pepsin, and amylase

  3. Select the correct enzyme-substrate combination.
    1. Amylase - starch
    2. Chymotrypsin - fat
    3. Nuclease - nuclei
    4. Lipase - disaccharides
    5. 2 of the above are correct

  4. Which of the following is true of electrolyte absorption?
    1. Sodium ion absorption is coupled to glucose and amino acid uptake
    2. Potassium can diffuse through the intestinal epithelium
    3. Vitamin D is necessary for calcium absorption
    4. All of the above

  5. The bonelike material that underlies the enamel cap and forms the bulk of the tooth is the _____________________.
  6. Chief cells in children secrete an enzyme that curdles milk. That enzyme is:
    1. Chymotrypsin
    2. Pepsinogen
    3. Pepsin
    4. Lactin
    5. Rennin

  7. The chief bile pigment is _________________.
  8. Contributors of enzymes to the digestive tract lumen include all of the following EXCEPT:
    1. Parotid glands
    2. Stomach
    3. Liver
    4. Pancreas
    5. Small Intestine

  9. Each of the following statements about Brunner's glands is correct EXCEPT:
    1. They are a characteristic component of the duodenal wall
    2. They produce a serous secretion rich in digestive enzymes
    3. They lie in the submucosal layer
    4. They empty their secretions into the crypts of Lieberkuhn

  10. The wall of the stomach:
    1. Is covered on its outer surface by simple squamous epithelium
    2. Is thrown into temporary folds called rugae when the stomach is empty
    3. Is covered on its inner surface by a simple columnar epithelium
    4. Has 3 layers of smooth muscle in its muscularis externa
    5. All of the above

  11. Saliva contains:
    1. Amylase
    2. Mucus
    3. Immunoglobulins
    4. Lysozyme
    5. All of the above
    6. Only a and b

  12. Within the connective tissue of a portal triad, one might find a:
    1. Branch of the hepatic artery
    2. Bile duct
    3. Branch of the hepatic portal vein
    4. Lymphatic vessel
    5. All of the above

  13. Both exocrine and endocrine functions are performed by the:
    1. Pancreas
    2. Liver
    3. Crypts of Lieberkuhn
    4. Gastric glands
    5. All of the above

    For the next 6 questions, use the following 4 choices.
    Each may be used once, more than once, or not at all.
    1. Hepatic portal vein
    2. Hepatic artery
    3. Both a and b
    4. Neither a nor b

  14. Contain(s) blood richest in nutrients
  15. Contain(s) blood richest in oxygen
  16. Contain(s) blood richest in the breakdown products of red blood cell destruction
  17. Drain(s) into hepatic sinusoids
  18. Receive(s) blood from the central veins
  19. Contribute(s) majority of liver blood volume

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