NR 507 Advanced Pathophysiology PMHNP Final
Exam | Weeks 1–8 100 Questions With Rationales
| 2026/2027 Update
Question 1.
A 55-year-old patient presents with heartburn, regurgitation, and dysphagia. An endoscopy
reveals inflammation of the distal esophagus. The nurse practitioner understands that the
primary pathophysiologic mechanism of gastroesophageal reflux disease (GERD) is:
A. Excessive production of hydrochloric acid by parietal cells
B. Incompetence of the lower esophageal sphincter allowing gastric contents to reflux
C. Hypermotility of the esophageal smooth muscle propelling acid upward
D. Decreased gastric emptying time causing bile salt accumulation
Correct Answer: B
Rationale: GERD is primarily caused by transient or permanent relaxation/incompetence of the
lower esophageal sphincter (LES), which permits gastric acid and pepsin to reflux into the
esophagus, causing mucosal injury. While acid production (A) contributes, it is not the primary
defect. Esophageal dysmotility (C) may be present but is secondary. Delayed gastric emptying
(D) can exacerbate GERD but is not the primary mechanism.
________________________________________________________________________________
Question 2.
A patient with a long history of GERD develops Barrett esophagus. The nurse practitioner
recognizes that this condition represents which pathophysiologic change?
,A. Dysplasia of squamous epithelium progressing to adenocarcinoma
B. Metaplasia of squamous epithelium to columnar epithelium with goblet cells
C. Hyperplasia of basal cell layer causing esophageal stricture
D. Atrophy of muscularis mucosa leading to hiatal hernia formation
Correct Answer: B
Rationale: Barrett esophagus is defined as metaplasia—replacement of the normal stratified
squamous epithelium with columnar epithelium containing intestinal-type goblet cells. This
adaptive change increases the risk of adenocarcinoma but is not dysplasia itself (A). Hyperplasia
(C) and atrophy (D) do not describe Barrett esophagus.
________________________________________________________________________________
Question 3.
A 68-year-old male presents with epigastric pain that occurs 30 minutes to 2 hours after eating
and frequently awakens him at night. The pain is relieved by food or antacids. These clinical
manifestations are most consistent with:
A. Gastric ulcer
B. Duodenal ulcer
C. GERD with esophageal spasm
D. Chronic pancreatitis
Correct Answer: B
Rationale: Duodenal ulcers classically produce pain 30 minutes to 2 hours postprandially when
the stomach empties and acid enters the duodenum; pain often occurs at night and is relieved
,by food or antacids. Gastric ulcer pain (A) typically worsens with eating. GERD (C) presents with
heartburn and regurgitation. Chronic pancreatitis (D) causes constant, severe epigastric pain
radiating to the back.
________________________________________________________________________________
Question 4.
The nurse practitioner is educating a patient about peptic ulcer disease (PUD). Which
statement correctly differentiates the etiology of gastric ulcers from duodenal ulcers?
A. Gastric ulcers are primarily caused by H. pylori, while duodenal ulcers are caused by NSAIDs
B. Gastric ulcers result from impaired mucosal defense mechanisms, whereas duodenal ulcers
result from excessive acid secretion
C. Duodenal ulcers are associated with malignancy, while gastric ulcers are always benign
D. Gastric ulcers occur exclusively in the antrum, while duodenal ulcers occur in the fundus
Correct Answer: B
Rationale: Gastric ulcers are characterized by a breakdown in mucosal defense (decreased
bicarbonate, mucus, prostaglandins, blood flow) against normal or reduced acid levels.
Duodenal ulcers are characterized by excessive acid secretion relative to duodenal buffering
capacity. Both can be caused by H. pylori and NSAIDs (A is incorrect). Gastric ulcers have a
higher malignant potential than duodenal ulcers (C is incorrect). Anatomic locations in D are
reversed.
________________________________________________________________________________
Question 5.
, A 25-year-old male presents with acute onset of periumbilical pain that has migrated to the
right lower quadrant, accompanied by nausea, low-grade fever, and anorexia. Rebound
tenderness and guarding are present. The most likely diagnosis is:
A. Crohn disease
B. Acute appendicitis
C. Diverticulitis
D. Irritable bowel syndrome
Correct Answer: B
Rationale: Acute appendicitis classically presents with periumbilical pain that migrates to the
right lower quadrant (McBurney point), accompanied by anorexia, nausea, low-grade fever, and
peritoneal signs (rebound tenderness, guarding). Crohn disease (A) presents with chronic
diarrhea and weight loss. Diverticulitis (C) typically affects older adults with left lower quadrant
pain. IBS (D) does not cause fever or peritoneal signs.
________________________________________________________________________________
Question 6.
A patient with acute appendicitis has an elevated white blood cell count with left shift. The
nurse practitioner understands that this laboratory finding indicates:
A. Viral infection with lymphocytosis
B. Bacterial infection with neutrophilia and release of immature neutrophils
C. Parasitic infection with eosinophilia
D. Autoimmune response with monocytosis
Exam | Weeks 1–8 100 Questions With Rationales
| 2026/2027 Update
Question 1.
A 55-year-old patient presents with heartburn, regurgitation, and dysphagia. An endoscopy
reveals inflammation of the distal esophagus. The nurse practitioner understands that the
primary pathophysiologic mechanism of gastroesophageal reflux disease (GERD) is:
A. Excessive production of hydrochloric acid by parietal cells
B. Incompetence of the lower esophageal sphincter allowing gastric contents to reflux
C. Hypermotility of the esophageal smooth muscle propelling acid upward
D. Decreased gastric emptying time causing bile salt accumulation
Correct Answer: B
Rationale: GERD is primarily caused by transient or permanent relaxation/incompetence of the
lower esophageal sphincter (LES), which permits gastric acid and pepsin to reflux into the
esophagus, causing mucosal injury. While acid production (A) contributes, it is not the primary
defect. Esophageal dysmotility (C) may be present but is secondary. Delayed gastric emptying
(D) can exacerbate GERD but is not the primary mechanism.
________________________________________________________________________________
Question 2.
A patient with a long history of GERD develops Barrett esophagus. The nurse practitioner
recognizes that this condition represents which pathophysiologic change?
,A. Dysplasia of squamous epithelium progressing to adenocarcinoma
B. Metaplasia of squamous epithelium to columnar epithelium with goblet cells
C. Hyperplasia of basal cell layer causing esophageal stricture
D. Atrophy of muscularis mucosa leading to hiatal hernia formation
Correct Answer: B
Rationale: Barrett esophagus is defined as metaplasia—replacement of the normal stratified
squamous epithelium with columnar epithelium containing intestinal-type goblet cells. This
adaptive change increases the risk of adenocarcinoma but is not dysplasia itself (A). Hyperplasia
(C) and atrophy (D) do not describe Barrett esophagus.
________________________________________________________________________________
Question 3.
A 68-year-old male presents with epigastric pain that occurs 30 minutes to 2 hours after eating
and frequently awakens him at night. The pain is relieved by food or antacids. These clinical
manifestations are most consistent with:
A. Gastric ulcer
B. Duodenal ulcer
C. GERD with esophageal spasm
D. Chronic pancreatitis
Correct Answer: B
Rationale: Duodenal ulcers classically produce pain 30 minutes to 2 hours postprandially when
the stomach empties and acid enters the duodenum; pain often occurs at night and is relieved
,by food or antacids. Gastric ulcer pain (A) typically worsens with eating. GERD (C) presents with
heartburn and regurgitation. Chronic pancreatitis (D) causes constant, severe epigastric pain
radiating to the back.
________________________________________________________________________________
Question 4.
The nurse practitioner is educating a patient about peptic ulcer disease (PUD). Which
statement correctly differentiates the etiology of gastric ulcers from duodenal ulcers?
A. Gastric ulcers are primarily caused by H. pylori, while duodenal ulcers are caused by NSAIDs
B. Gastric ulcers result from impaired mucosal defense mechanisms, whereas duodenal ulcers
result from excessive acid secretion
C. Duodenal ulcers are associated with malignancy, while gastric ulcers are always benign
D. Gastric ulcers occur exclusively in the antrum, while duodenal ulcers occur in the fundus
Correct Answer: B
Rationale: Gastric ulcers are characterized by a breakdown in mucosal defense (decreased
bicarbonate, mucus, prostaglandins, blood flow) against normal or reduced acid levels.
Duodenal ulcers are characterized by excessive acid secretion relative to duodenal buffering
capacity. Both can be caused by H. pylori and NSAIDs (A is incorrect). Gastric ulcers have a
higher malignant potential than duodenal ulcers (C is incorrect). Anatomic locations in D are
reversed.
________________________________________________________________________________
Question 5.
, A 25-year-old male presents with acute onset of periumbilical pain that has migrated to the
right lower quadrant, accompanied by nausea, low-grade fever, and anorexia. Rebound
tenderness and guarding are present. The most likely diagnosis is:
A. Crohn disease
B. Acute appendicitis
C. Diverticulitis
D. Irritable bowel syndrome
Correct Answer: B
Rationale: Acute appendicitis classically presents with periumbilical pain that migrates to the
right lower quadrant (McBurney point), accompanied by anorexia, nausea, low-grade fever, and
peritoneal signs (rebound tenderness, guarding). Crohn disease (A) presents with chronic
diarrhea and weight loss. Diverticulitis (C) typically affects older adults with left lower quadrant
pain. IBS (D) does not cause fever or peritoneal signs.
________________________________________________________________________________
Question 6.
A patient with acute appendicitis has an elevated white blood cell count with left shift. The
nurse practitioner understands that this laboratory finding indicates:
A. Viral infection with lymphocytosis
B. Bacterial infection with neutrophilia and release of immature neutrophils
C. Parasitic infection with eosinophilia
D. Autoimmune response with monocytosis
