SGNA Pathophysiology of GI Disorders

Question 1

Barrett's esophagus is characterized by the replacement of normal squamous epithelium with which type of epithelium?

Accepted Answer

Columnar intestinal-type epithelium with goblet cells

Answer

Barrett's esophagus involves metaplastic replacement of normal squamous epithelium with specialized intestinal-type columnar epithelium containing goblet cells, increasing the risk of esophageal adenocarcinoma.

Question 2

What is the primary pathophysiological mechanism underlying gastroesophageal reflux disease (GERD)?

Accepted Answer

Transient lower esophageal sphincter relaxations (TLESRs)

Answer

Transient lower esophageal sphincter relaxations (TLESRs) are the predominant mechanism allowing gastric contents to reflux into the esophagus, occurring independent of swallowing.

Question 3

Celiac disease is triggered by an immune response to which protein fraction?

Accepted Answer

Gliadin, a fraction of gluten

Answer

Celiac disease is an autoimmune condition triggered by gliadin, the alcohol-soluble fraction of gluten, which causes villous atrophy and malabsorption in the small intestine.

Question 4

Which characteristic of Crohn's disease inflammation most distinguishes it pathologically from ulcerative colitis?

Accepted Answer

Transmural (full-thickness) inflammation

Answer

Crohn's disease is characterized by transmural inflammation affecting all layers of the bowel wall, which can lead to fistulas, abscesses, and strictures—complications not typical of ulcerative colitis.

Question 5

Crypt abscesses seen on histopathology are a hallmark finding most characteristic of which condition?

Accepted Answer

Ulcerative colitis

Answer

Crypt abscesses—neutrophilic infiltrates within intestinal crypts—are a hallmark histological finding in active ulcerative colitis, reflecting the mucosal-predominant nature of the disease.

SGNA - Society of Gastroenterology Nurses and Associates Practice Test

SGNA - Society of Gastroenterology Nurses and Associates Practice Test

SGNA Pathophysiology of GI Disorders