Gastrointestinal Disorders
Exam Questions And Correct
Answers (Verified Answers)
Plus Rationales 2025/2026
Q&A
1. Which layer of the gastrointestinal (GI) tract contains the blood
vessels, lymphatics, and nerves?
A. Mucosa
B. Submucosa
C. Muscularis externa
D. Serosa
Answer: B. Submucosa
Rationale: The submucosa provides structural support and contains
vessels and nerves that supply the mucosa and muscularis layers.
2. What is the most common cause of peptic ulcer disease?
A. Stress
B. Helicobacter pylori infection
C. NSAID use
D. Zollinger-Ellison syndrome
Rationale: H. pylori infection is responsible for the majority of peptic
ulcers, while NSAIDs contribute but are less common.
,3. Which of the following is a hallmark symptom of
gastroesophageal reflux disease (GERD)?
A. Hematemesis
B. Heartburn
C. Diarrhea
D. Jaundice
Rationale: GERD is characterized by acid reflux leading to burning
retrosternal discomfort.
4. A 45-year-old patient presents with jaundice, dark urine, and
pale stools. Which type of jaundice is most likely?
A. Hemolytic
B. Obstructive (posthepatic)
C. Hepatocellular
D. Physiologic
Rationale: Obstructive jaundice occurs due to bile duct obstruction,
leading to dark urine and pale stools.
5. Which lab marker is most specific for hepatocellular injury?
A. ALP
B. GGT
C. ALT
D. Bilirubin
Rationale: ALT is primarily found in hepatocytes and rises specifically
in liver cell injury.
6. Which condition is characterized by chronic inflammation of the
colon, continuous lesions, and superficial mucosal involvement?
, A. Crohn's disease
B. Ulcerative colitis
C. Irritable bowel syndrome
D. Celiac disease
Rationale: Ulcerative colitis affects the colon with continuous
mucosal inflammation.
7. Crohn’s disease typically affects which part of the GI tract?
A. Esophagus
B. Stomach
C. Terminal ileum
D. Rectum
Rationale: Crohn’s disease can affect any part of the GI tract, but the
terminal ileum is most commonly involved.
8. What is the primary pathophysiologic mechanism in irritable
bowel syndrome (IBS)?
A. Autoimmune destruction
B. Altered gut motility and visceral hypersensitivity
C. Bile salt malabsorption
D. H. pylori infection
Rationale: IBS is a functional disorder with abnormal motility and
increased gut sensitivity without structural abnormalities.
9. Which lab test is most useful in diagnosing celiac disease?
A. Stool culture
B. Liver function tests
C. Anti-tissue transglutaminase (tTG) antibodies
D. ESR
Exam Questions And Correct
Answers (Verified Answers)
Plus Rationales 2025/2026
Q&A
1. Which layer of the gastrointestinal (GI) tract contains the blood
vessels, lymphatics, and nerves?
A. Mucosa
B. Submucosa
C. Muscularis externa
D. Serosa
Answer: B. Submucosa
Rationale: The submucosa provides structural support and contains
vessels and nerves that supply the mucosa and muscularis layers.
2. What is the most common cause of peptic ulcer disease?
A. Stress
B. Helicobacter pylori infection
C. NSAID use
D. Zollinger-Ellison syndrome
Rationale: H. pylori infection is responsible for the majority of peptic
ulcers, while NSAIDs contribute but are less common.
,3. Which of the following is a hallmark symptom of
gastroesophageal reflux disease (GERD)?
A. Hematemesis
B. Heartburn
C. Diarrhea
D. Jaundice
Rationale: GERD is characterized by acid reflux leading to burning
retrosternal discomfort.
4. A 45-year-old patient presents with jaundice, dark urine, and
pale stools. Which type of jaundice is most likely?
A. Hemolytic
B. Obstructive (posthepatic)
C. Hepatocellular
D. Physiologic
Rationale: Obstructive jaundice occurs due to bile duct obstruction,
leading to dark urine and pale stools.
5. Which lab marker is most specific for hepatocellular injury?
A. ALP
B. GGT
C. ALT
D. Bilirubin
Rationale: ALT is primarily found in hepatocytes and rises specifically
in liver cell injury.
6. Which condition is characterized by chronic inflammation of the
colon, continuous lesions, and superficial mucosal involvement?
, A. Crohn's disease
B. Ulcerative colitis
C. Irritable bowel syndrome
D. Celiac disease
Rationale: Ulcerative colitis affects the colon with continuous
mucosal inflammation.
7. Crohn’s disease typically affects which part of the GI tract?
A. Esophagus
B. Stomach
C. Terminal ileum
D. Rectum
Rationale: Crohn’s disease can affect any part of the GI tract, but the
terminal ileum is most commonly involved.
8. What is the primary pathophysiologic mechanism in irritable
bowel syndrome (IBS)?
A. Autoimmune destruction
B. Altered gut motility and visceral hypersensitivity
C. Bile salt malabsorption
D. H. pylori infection
Rationale: IBS is a functional disorder with abnormal motility and
increased gut sensitivity without structural abnormalities.
9. Which lab test is most useful in diagnosing celiac disease?
A. Stool culture
B. Liver function tests
C. Anti-tissue transglutaminase (tTG) antibodies
D. ESR
