1. Which of the following structures is primarily retroperitoneal?
2. Intrinsic factor, essential for vitamin B12 absorption, is secreted by which cells of the stomach?
3. A “cobblestone” appearance of the intestinal mucosa is a characteristic feature of:
4. The final products of carbohydrate digestion, such as glucose and fructose, are primarily absorbed in the:
5. The portal triad consists of the proper hepatic artery, hepatic portal vein, and:
6. Which hormone stimulates gallbladder contraction and pancreatic enzyme secretion in response to fatty acids and amino acids in the duodenum?
7. Helicobacter pylori infection is a major risk factor for all of the following EXCEPT:
8. Omeprazole is a widely used drug for acid-related disorders. It acts by irreversibly inhibiting which of the following?
9. The taeniae coli are three separate longitudinal ribbons of smooth muscle found on the outer surface of the:
10. Bile salts, crucial for fat emulsification and absorption, are synthesized from which molecule in the liver?
11. A “bird’s beak” appearance on a barium swallow X-ray is the classic sign for:
12. The primary physiological function of the large intestine is:
13. The ampulla of Vater is a critical anatomical landmark formed by the junction of the common bile duct and the:
14. Which type of viral hepatitis is primarily transmitted via the fecal-oral route and does not cause a chronic carrier state?
15. The migrating motor complex (MMC), which cleanses the small intestine during fasting, is initiated by which hormone?
16. Celiac disease is an autoimmune disorder characterized by an inflammatory response to the ingestion of:
17. Brunner’s glands, which secrete alkaline mucus to neutralize stomach acid, are characteristically found in the submucosa of the:
18. Lactulose is used to treat hepatic encephalopathy. Its primary mechanism of action is to:
19. An “apple core” lesion seen on a barium enema is highly suggestive of:
20. In a healthy individual, which of the following is the main site for dietary iron absorption?
21. The blood supply to the derivatives of the embryonic foregut is primarily from the:
22. Wilson’s disease is a genetic disorder of copper metabolism that can lead to cirrhosis. A characteristic ophthalmologic finding is:
23. The enzymatic digestion of carbohydrates begins in the mouth with the action of:
24. Ondansetron, a powerful antiemetic, exerts its effect by acting as a selective antagonist at which receptor?
25. Courvoisier’s law states that in a patient with jaundice, a palpable, non-tender gallbladder is unlikely to be due to:
