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Quiz: Inflammatory Bowel Disease: Ulcerative Colitis and Crohn's

Test your understanding of Chapter 9. Choose the best answer, then click Show Answer to check.

Question 1

Which statement correctly describes where ulcerative colitis occurs?

  1. Anywhere from the mouth to the anus, in patches
  2. Only in the colon and rectum, continuously from the rectum upward
  3. Only in the small intestine, through the whole thickness of the wall
  4. Only in the stomach and the first part of the small intestine
Show Answer

The correct answer is B. Ulcerative colitis affects only the colon and rectum, starting at the rectum and spreading upward in one continuous stretch, in the inner layers of the wall. Option A describes Crohn's disease, which is the most common mix-up.

Concept Tested: Ulcerative Colitis Bloom's Level: Remember

Question 2

What does "transmural inflammation" mean?

  1. Inflammation that moves from one person to another
  2. Inflammation that affects only the inner lining of the colon
  3. Inflammation that appears outside the gut, such as in the joints
  4. Inflammation that extends through the entire thickness of the gut wall
Show Answer

The correct answer is D. "Trans" means across and "mural" means wall, so transmural inflammation goes through every layer of the gut wall. It is typical of Crohn's disease. Option C describes an extraintestinal manifestation, a different idea.

Concept Tested: Transmural Inflammation Bloom's Level: Remember

Question 3

Fecal calprotectin is a useful test because it:

  1. Comes mainly from neutrophils that move into inflamed gut tissue, so high stool levels signal intestinal inflammation
  2. Shows exactly which part of the intestine is inflamed
  3. Measures how many bacteria live in the colon
  4. Confirms a diagnosis of Crohn's disease without any other tests
Show Answer

The correct answer is A. Calprotectin is released mainly by neutrophils, and its level in stool rises with intestinal inflammation. Like a smoke detector, it signals that inflammation is probably present but can't show where it is or what type it is (options B and D), which is why colonoscopy with biopsy is still needed.

Concept Tested: Fecal Calprotectin Bloom's Level: Remember

Question 4

Why do doctors use corticosteroids only as a short-term treatment in IBD?

  1. They take many months to start working
  2. They work only in ulcerative colitis, not Crohn's disease
  3. They act fast to calm inflammation, but long-term use can cause serious side effects such as bone thinning
  4. They cure IBD after one course, so longer use is unnecessary
Show Answer

The correct answer is C. Steroids broadly calm the immune system and relieve symptoms quickly, which makes them a good bridge while longer-term medicine starts working. Long-term use can cause serious side effects, so they are not used to maintain remission. Option D is wrong because no medicine cures IBD.

Concept Tested: Corticosteroid Bloom's Level: Understand

Question 5

How does a biologic therapy such as an anti-TNF medicine differ from a corticosteroid?

  1. A biologic blocks one specific immune signal, while a steroid broadly turns down much of the immune system
  2. A biologic is a pill, while a steroid must be injected
  3. A biologic is used only during flares, while a steroid is used for long-term maintenance
  4. A biologic kills gut bacteria, while a steroid repairs the gut lining
Show Answer

The correct answer is A. An anti-TNF biologic is a lab-made antibody that blocks one cytokine, tumor necrosis factor, while steroids act broadly. Option C reverses their usual roles: steroids are the short-term bridge, and biologics are commonly used for maintenance.

Concept Tested: Biologic Therapy Bloom's Level: Understand

Question 6

Why is mucosal healing, not just symptom relief, a long-term treatment target in IBD?

  1. Because symptoms in IBD are imaginary and can't be measured
  2. Because mucosal healing means the disease is cured
  3. Because a healed lining means medicine can always be stopped
  4. Because symptoms can improve while inflammation keeps simmering and slowly damaging the bowel
Show Answer

The correct answer is D. Symptoms and inflammation don't always match, so a person can feel well while inflammation continues, which in Crohn's can lead to strictures and fistulas. STRIDE-II therefore set endoscopic healing as a long-term target. Option B is wrong because healing is a sign of good control, not a cure.

Concept Tested: Mucosal Healing Bloom's Level: Understand

Question 7

A 16-year-old has had bloody diarrhea and urgency for two months. Colonoscopy shows continuous inflammation from the rectum partway up the colon, limited to the inner lining, and a normal small intestine. Which diagnosis fits best?

  1. Crohn's disease
  2. Ulcerative colitis
  3. Irritable bowel syndrome
  4. Hirschsprung disease
Show Answer

The correct answer is B. Continuous inflammation starting at the rectum, limited to the colon and the inner layers, with bloody diarrhea, is the pattern of ulcerative colitis. Crohn's (option A) would usually show patchy, transmural inflammation, often in the end of the small intestine. IBS (option C) would not show visible inflammation.

Concept Tested: Ulcerative Colitis Bloom's Level: Apply

Question 8

Riya has felt well for months on her biologic. A classmate says, "You're in remission, so you can stop your shots now." Based on the chapter, what is the best response?

  1. "You're right, remission means the disease is gone."
  2. "I'll stop for a month and see what happens."
  3. "Maintenance medicine is usually what keeps remission going, so any change is a decision for my care team."
  4. "Remission only happens in ulcerative colitis, so it doesn't apply to me."
Show Answer

The correct answer is C. Remission is a quiet period, not a cure, and maintenance medicine usually keeps it going. Stopping on your own (option B) can let inflammation return weeks later, as the IBD Flare Timeline shows. Remission happens in both Crohn's and UC, so option D is false.

Concept Tested: Remission Bloom's Level: Apply

Question 9

In a 2021 meta-analysis of 30,118 adults with IBD, depression symptoms were found in 38.9% of people with active disease and 24.2% of people with inactive disease. Which conclusion is best supported?

  1. Depression symptoms are more common during active IBD, but this study can't show which causes which
  2. Gut inflammation has been proven to cause depression
  3. Depression causes IBD flares
  4. Treating depression cures IBD
Show Answer

The correct answer is A. The studies were observational snapshots using symptom questionnaires, so they show an association. Inflammation might affect mood, feeling sick might lower mood, or mood might affect symptoms. Options B and C each claim one direction of cause that this design can't establish.

Concept Tested: Disease Flare Bloom's Level: Analyze

Question 10

A survey found that 1.6% of US adults say a doctor told them they had IBD, while insurance claims data put IBD at about 0.7% of Americans. What best explains the difference?

  1. IBD became twice as common in the time between the two studies
  2. One of the studies must have made an arithmetic mistake
  3. Claims data count only children, so they miss most adults
  4. The survey counts anyone ever told they had IBD, which can include old or mistaken diagnoses, while claims require actual diagnosis and treatment records
Show Answer

The correct answer is D. The two methods measure different things: self-report of ever being told versus records of diagnosis and treatment. Option A is tempting, but different methods can't show a trend, and the claims estimate covers all ages, so option C is wrong too.

Concept Tested: Inflammatory Bowel Disease Bloom's Level: Analyze