NURS 231/NURS231 Module 7 V2 |
Pathophysiology Q&A with Rationale | Portage
Learning
1. A patient is diagnosed with Barrett esophagus following chronic gastroesophageal reflux
disease (GERD). Which cellular change best describes this condition?
A. Squamous epithelium replaces columnar cells in the esophagus.
B. Columnar epithelium replaces squamous cells in the distal esophagus.
C. Hyperplasia of the smooth muscle layer in the esophageal wall.
D. Atrophy of the mucosal lining due to chronic inflammation.
Correct Answer: B
Explanation: Barrett esophagus is a classic example of metaplasia where the normal
stratified squamous epithelium is replaced by columnar epithelium. This transformation
occurs as a protective response to chronic acid exposure from the stomach. If left
unmonitored, this condition significantly increases the risk for esophageal
adenocarcinoma.
2. A 45-year-old male presents with severe epigastric pain that improves immediately after
eating. Which condition is most likely responsible for this symptom?
A. Gastric ulcer
B. Diverticulitis
,C. Acute cholecystitis
D. Duodenal ulcer
Correct Answer: D
Explanation: Duodenal ulcers typically present with pain that is relieved by food intake or
antacids because the food buffers the acid. In contrast, pain from a gastric ulcer is often
exacerbated by eating due to the stimulation of gastric acid secretion. This cyclic pattern of
pain-food-relief is a hallmark diagnostic feature of duodenal pathology.
3. What is the primary pathophysiologic mechanism behind the development of hepatic
encephalopathy in patients with cirrhosis?
A. Accumulation of neurotoxic substances like ammonia in the blood.
B. Inability of the liver to conjugate bilirubin.
C. Decreased production of albumin leading to cerebral edema.
D. Excessive production of bile salts circulating in the CNS.
Correct Answer: A
Explanation: Hepatic encephalopathy occurs when the liver can no longer convert
ammonia, a byproduct of protein metabolism, into urea. The resulting high levels of serum
ammonia cross the blood-brain barrier and impair neuronal function. This leads to clinical
manifestations such as asterixis, confusion, and potential coma.
, 4. Which of the following is a characteristic feature of Crohn’s disease that distinguishes it
from ulcerative colitis?
A. Inflammation is limited to the mucosal layer.
B. The presence of ‘skip lesions’ throughout the GI tract.
C. Blood in the stool is a universal finding.
D. The disease always begins in the rectum and moves proximally.
Correct Answer: B
Explanation: Crohn’s disease is characterized by skip lesions, which are areas of
inflammation separated by healthy tissue. Unlike ulcerative colitis, which is continuous and
confined to the colon, Crohn’s can affect any part of the GI tract from mouth to anus.
Furthermore, Crohn’s involves transmural inflammation, affecting all layers of the
intestinal wall.
5. In the context of acute pancreatitis, what process leads to the destruction of the pancreatic
parenchyma?
A. Bacterial infection from the duodenum.
B. Autodigestion by prematurely activated digestive enzymes.
C. Chronic alcohol-induced atrophy of the acinar cells.
D. Obstruction of the cystic duct by a gallstone.
Correct Answer: B
Pathophysiology Q&A with Rationale | Portage
Learning
1. A patient is diagnosed with Barrett esophagus following chronic gastroesophageal reflux
disease (GERD). Which cellular change best describes this condition?
A. Squamous epithelium replaces columnar cells in the esophagus.
B. Columnar epithelium replaces squamous cells in the distal esophagus.
C. Hyperplasia of the smooth muscle layer in the esophageal wall.
D. Atrophy of the mucosal lining due to chronic inflammation.
Correct Answer: B
Explanation: Barrett esophagus is a classic example of metaplasia where the normal
stratified squamous epithelium is replaced by columnar epithelium. This transformation
occurs as a protective response to chronic acid exposure from the stomach. If left
unmonitored, this condition significantly increases the risk for esophageal
adenocarcinoma.
2. A 45-year-old male presents with severe epigastric pain that improves immediately after
eating. Which condition is most likely responsible for this symptom?
A. Gastric ulcer
B. Diverticulitis
,C. Acute cholecystitis
D. Duodenal ulcer
Correct Answer: D
Explanation: Duodenal ulcers typically present with pain that is relieved by food intake or
antacids because the food buffers the acid. In contrast, pain from a gastric ulcer is often
exacerbated by eating due to the stimulation of gastric acid secretion. This cyclic pattern of
pain-food-relief is a hallmark diagnostic feature of duodenal pathology.
3. What is the primary pathophysiologic mechanism behind the development of hepatic
encephalopathy in patients with cirrhosis?
A. Accumulation of neurotoxic substances like ammonia in the blood.
B. Inability of the liver to conjugate bilirubin.
C. Decreased production of albumin leading to cerebral edema.
D. Excessive production of bile salts circulating in the CNS.
Correct Answer: A
Explanation: Hepatic encephalopathy occurs when the liver can no longer convert
ammonia, a byproduct of protein metabolism, into urea. The resulting high levels of serum
ammonia cross the blood-brain barrier and impair neuronal function. This leads to clinical
manifestations such as asterixis, confusion, and potential coma.
, 4. Which of the following is a characteristic feature of Crohn’s disease that distinguishes it
from ulcerative colitis?
A. Inflammation is limited to the mucosal layer.
B. The presence of ‘skip lesions’ throughout the GI tract.
C. Blood in the stool is a universal finding.
D. The disease always begins in the rectum and moves proximally.
Correct Answer: B
Explanation: Crohn’s disease is characterized by skip lesions, which are areas of
inflammation separated by healthy tissue. Unlike ulcerative colitis, which is continuous and
confined to the colon, Crohn’s can affect any part of the GI tract from mouth to anus.
Furthermore, Crohn’s involves transmural inflammation, affecting all layers of the
intestinal wall.
5. In the context of acute pancreatitis, what process leads to the destruction of the pancreatic
parenchyma?
A. Bacterial infection from the duodenum.
B. Autodigestion by prematurely activated digestive enzymes.
C. Chronic alcohol-induced atrophy of the acinar cells.
D. Obstruction of the cystic duct by a gallstone.
Correct Answer: B
