33 Study Guide

  1. The muscularis of the gastrointestinal tract is:



    D. composed of circular fibers and longitudinal fibers.
  2. The digestive functions performed by the saliva and salivary amylase, respectively, are:



    A. lubrication and carbohydrate digestion.
  3. The nervous pathway involved in salivary secretion requires stimulation of:



    A. receptors in the mouth, sensory impulses, and parasympathetic impulses to salivary glands.
  4. Food would pass rapidly from the stomach into the duodenum if it were not for the:




    E. pyloric sphincter.
  5. The secretion of gastric juice:




    D. occurs in three phases: cephalic, gastric, and intestinal.
  6. During nervous control of gastric secretion, the gastric glands secrete before food enters the stomach. This stimulus to the glands comes from:



    A. parasympathetic impulses over the vagus nerve.
  7. Pepsinogen:



    D. All of the above are correct.
  8. Beginning at the lumen of the tube, the sequence of layers of the gastrointestinal tract is:



    B. mucosa, submucosa, muscularis, serosa.
  9. Normally, when chyme leaves the stomach:




    D. the proteins have been partly digested into polypeptides.
  10. Which layer of the small intestine includes microvilli?



    B. mucosa
  11. Which is not an example of mechanical digestion?



    B. conversion of protein molecules into amino acids
  12. Pancreatic juice is to trypsin as gastric juice is to:



    B. pepsin.
  13. Which part of the small intestine is most distal from the pylorus?




    E. jejunum
  14. The pancreas:




    C. is a gland with its duct ultimately opening into the duodenum.
  15. The chief role played by the pancreas in digestion is to:



    D. secrete enzymes, which digest food in the small intestine.
  16. Among the structural features of the small intestine are villi, microvilli, and circular folds. Their function is to:



    A. increase the surface area for absorption.
  17. The fate of carbohydrates in the small intestine is:



    A. digestion to monosaccharides.
  18. The absorptive fate of the end products of digestion may be summarized by which of the following?



    A. amino acids and monosaccharides are absorbed into blood capillaries; most fatty acids are absorbed into lymph.
  19. A lobule of the liver contains a centrally located:



    D. vein with radiating hepatocytes and sinusoids.
  20. An obstruction of the common bile duct would cause blockage of bile coming from:



    C. both the liver and the gallbladder.
  21. The human adult liver does not:



    A. produce erythrocytes.
  22. The chyme that enters the large intestine is converted to feces by activity of:



    A. bacteria and water reabsorption.
  23. Splanchnic organs





    E. act(s) as blood reservoir for heart and lungs
  24. Kupffer cells
    a. stimulate(s) gallbladder to eject bile.
    b. activate(s) pepsinogen
    c. trap(s) bacteria
    d. increase(s) gastrointestinal mobility
    e. act(s) as blood reservoir for heart and lungs
    f. stimulate(s) liver to secrete bile
    c. trap(s) bacteria
  25. Cholecystokinin
    a. stimulate(s) gallbladder to eject bile.
    b. activate(s) pepsinogen
    c. trap(s) bacteria
    d. increase(s) gastrointestinal mobility
    e. act(s) as blood reservoir for heart and lungs
    f. stimulate(s) liver to secrete bile
    a. stimulate(s) gallbladder to eject bile.
Author
NursyDaisy
ID
137400
Card Set
33 Study Guide
Description
Structure and Function of the Digestive System
Updated