GI Secretions — Gastrointestinal Physiology

GI Secretions MCQs: practice questions

Sample GI Secretions multiple-choice questions from Gastrointestinal Physiology.

1. CCK causes the sphincter of Oddi to:

   • A. Contract
   • B. Relax
   • C. Become impermeable to bile
   • D. Increase gastric pressure
   • E. Secrete pancreatic enzymes

2. At high salivary flow rates, saliva becomes:

   • A. More hypotonic than at low flow
   • B. More similar to plasma
   • C. Lower in Na+ and Cl−
   • D. Higher in K+ only
   • E. Free of HCO3−

3. Compared with plasma, saliva is normally:

   • A. Na+-rich
   • B. Hypertonic
   • C. Exactly isotonic
   • D. Protein-rich
   • E. Hypotonic

4. Somatostatin inhibits gastric acid secretion by:

   • A. Directly inhibiting parietal cells and indirectly inhibiting gastrin and histamine
   • B. Stimulating gastrin
   • C. Stimulating histamine release
   • D. Activating H+-K+ ATPase
   • E. Increasing vagal output

5. Bile contains:

   • A. Bile salts, phospholipids, cholesterol, and bilirubin
   • B. Pepsin, HCl, and gastrin
   • C. Trypsin, amylase, and lipase
   • D. Intrinsic factor and pepsinogen
   • E. Only bicarbonate

6. The alkaline tide after a meal results from:

7. CCK causes the gallbladder to:

8. Saliva initiates triglyceride digestion through:

9. CCK potentiates secretin's effect on pancreatic:

10. Vagal stimulation also increases gastric acid secretion indirectly through:

11. Parasympathetic stimulation of salivary glands causes:

12. Bile salts aid lipid digestion by:

13. The second messenger for secretin is:

14. CCK stimulates pancreatic:

15. Atropine reduces gastric acid secretion by blocking:

16. Omeprazole decreases gastric acid secretion by inhibiting:

17. GI Secretions 30 questions • Five related options • One best answer • Explanation 1. The major salivary glands are the:

18. Gastric H+ secretion depends directly on the:

19. Vagal stimulation increases gastric H+ secretion directly through:

20. Cystic fibrosis can cause pancreatic malabsorption because of a defect in:

21. Saliva initiates carbohydrate digestion through:

22. Secretin increases biliary:

23. Secretin stimulates pancreatic:

24. The pancreatic secretion is characterized by:

25. Histamine stimulates gastric H+ secretion through:

26. Gastrin stimulates gastric acid secretion through a parietal-cell receptor coupled primarily to:

27. The second messenger for CCK is primarily:

28. Saliva is characterized by relatively high concentrations of:

29. The gastric chief cell secretes:

30. The gastric parietal cell secretes: