© BestSellerStuvia |
NU578
UNIT 4
GASTROINTESTINAL PHARMACOLOGY EXAM
2026/2027 VERIFIED QUESTIONS
Complete Answer Key • Detailed Rationales • Clinical Pharmacology Reasoning
Herzing University | School of Nursing
NU 578 | Advanced Pharmacology
EXAM TITLE: NU 578 UNIT 4 EXAM 2026/2027 |
GASTROINTESTINAL PHARMACOLOGY | VERIFIED
QUESTIONS
COURSE TITLE: Advanced Pharmacology
ACADEMIC YEAR: 2026/2027
TOTAL QUESTIONS: 75 | CORE DOMAINS: 6 | PASSING
STANDARD: 75% or Higher
COURSE CODE: NU 578
Core Domains:
Gastroesophageal Reflux Disease & Peptic Ulcer Disease Pharmacology • Antiemetic & Prokinetic Agents • Laxatives,
Antidiarrheals & Irritable Bowel Syndrome Therapies • Inflammatory Bowel Disease Pharmacology • Pancreatic &
Biliary Pharmacology • Hepatitis & Hepatic Disorders Pharmacology
Current Graduate Nursing Professional Focus
Multiple-Choice • Scenario Analysis • Applied Gastrointestinal Pharmacology Format
2026/2027 Edition — Aligned with the Herzing University NU 578 Advanced Pharmacology curriculum, AACN
Essentials of Master's Education, and evidence-based gastrointestinal pharmacotherapy standards
© BestSellerStuvia
Academic Year 2026/2027
NU 578 | 2026/2027
© BestSellerStuvia | | NU 578 | Academic Year 2026/2027
, © BestSellerStuvia |
ACTUAL QUESTIONS
Domain 1: Gastroesophageal Reflux Disease & Peptic Ulcer Disease Pharmacology
Question 1. A proton pump inhibitor reduces gastric acid secretion by which primary mechanism?
A. Competitive blockade of histamine H2 receptors on parietal cells
B. Neutralization of existing gastric acid in the lumen
C. Stimulation of prostaglandin E2 synthesis to enhance mucosal defense
D. Irreversible inhibition of the H+/K+-ATPase pump on the parietal cell canalicular membrane
Correct Answer: D
Rationale: PPIs covalently bind and irreversibly inhibit the H+/K+-ATPase (proton pump) on the luminal surface of
parietal cells, blocking the final common pathway of acid secretion regardless of stimulus.
Question 2. Long-term use of proton pump inhibitors is associated with which of the following risks?
A. Hyperkalemia and metabolic alkalosis
B. Hypercalcemia and nephrolithiasis
C. Thrombocytopenia and agranulocytosis
D. Hypomagnesemia, vitamin B12 deficiency, and increased Clostridioides difficile infection risk
Correct Answer: D
Rationale: Chronic PPI therapy reduces gastric acidity, impairing absorption of magnesium and protein-bound vitamin
B12 and altering gut flora, thereby elevating risk of C. difficile infection and fractures.
Question 3. Famotidine exerts its therapeutic effect by:
A. Reversible competitive antagonism of histamine at H2 receptors on parietal cells
B. Irreversible inhibition of the proton pump
C. Formation of a physical barrier over the ulcer base
D. Stimulation of bicarbonate secretion
Correct Answer: A
Rationale: H2-receptor antagonists are competitive, reversible blockers of histamine at parietal-cell H2 receptors,
reducing both basal and stimulated acid secretion.
Question 4. Which agent forms a viscous, protective complex that adheres to the ulcer crater in an acidic
environment?
A. Misoprostol
B. Sucralfate
C. Omeprazole
D. Ranitidine
Correct Answer: B
Rationale: Sucralfate polymerizes in acid to form a paste-like barrier that binds preferentially to ulcerated mucosa,
protecting it from acid, pepsin, and bile.
Question 5. Misoprostol is contraindicated in pregnancy primarily because it:
A. Stimulates uterine contractions and can induce abortion
B. Causes severe constipation
C. Produces irreversible renal toxicity
D. Antagonizes oxytocin receptors
Correct Answer: A
Rationale: Misoprostol is a prostaglandin E1 analog that increases uterine tone and contractility; it is therefore
absolutely contraindicated in pregnancy.
Question 6. The preferred first-line regimen for eradication of Helicobacter pylori in a treatment-naïve
patient without penicillin allergy typically includes:
A. A PPI plus clarithromycin and amoxicillin (or metronidazole)
B. Sucralfate monotherapy for 14 days
C. An H2RA plus bismuth only
© BestSellerStuvia | | NU 578 | Academic Year 2026/2027
, © BestSellerStuvia |
D. High-dose PPI monotherapy
Correct Answer: A
Rationale: Clarithromycin-based triple therapy (PPI + clarithromycin + amoxicillin) remains a first-line option when
local resistance rates are low and the patient has no prior macrolide exposure.
Question 7. Which statement regarding timing of PPI administration is most accurate?
A. PPIs should be taken with food to enhance absorption
B. PPIs should be administered at bedtime only
C. PPIs are most effective when taken 30–60 minutes before the first meal of the day
D. Food has no effect on PPI efficacy
Correct Answer: C
Rationale: PPIs require activation by acid and are most effective when taken before a meal so that newly synthesized
proton pumps are inhibited as they are inserted into the canalicular membrane.
Question 8. Antacids containing aluminum hydroxide are most likely to cause which adverse effect?
A. Constipation
B. Diarrhea
C. Hypercalcemia
D. Metabolic acidosis
Correct Answer: A
Rationale: Aluminum salts tend to produce constipation, whereas magnesium salts tend to produce diarrhea;
combination products are often used to balance these effects.
Question 9. Calcium carbonate antacids can produce which clinically important effect when taken in
large quantities with milk?
A. Hypocalcemia
B. Severe hypophosphatemia only
C. Iron-deficiency anemia
D. Milk-alkali syndrome (hypercalcemia, metabolic alkalosis, renal injury)
Correct Answer: D
Rationale: Excessive calcium carbonate intake, especially with dairy, can lead to milk-alkali syndrome characterized by
hypercalcemia, alkalosis, and acute kidney injury.
Question 10. Which of the following is a key counseling point for patients starting a PPI for GERD?
A. Use the lowest effective dose for the shortest duration consistent with treatment goals and reassess need periodically
B. Discontinue the drug abruptly after symptom resolution to avoid rebound
C. Take the medication only when symptoms occur (on-demand only for all patients)
D. Combine with an H2RA at the same time of day for synergistic effect
Correct Answer: A
Rationale: Guideline-directed care emphasizes the lowest effective PPI dose and periodic reassessment to minimize long-
term risks while controlling symptoms and preventing complications.
Question 11. A proton pump inhibitor reduces gastric acid secretion by which primary mechanism?
(clinical scenario 1)
A. Competitive blockade of histamine H2 receptors on parietal cells
B. Neutralization of existing gastric acid in the lumen
C. Irreversible inhibition of the H+/K+-ATPase pump on the parietal cell canalicular membrane
D. Stimulation of prostaglandin E2 synthesis to enhance mucosal defense
Correct Answer: C
Rationale: PPIs covalently bind and irreversibly inhibit the H+/K+-ATPase (proton pump) on the luminal surface of
parietal cells, blocking the final common pathway of acid secretion regardless of stimulus.
Question 12. Long-term use of proton pump inhibitors is associated with which of the following risks?
(clinical scenario 2)
A. Hyperkalemia and metabolic alkalosis
© BestSellerStuvia | | NU 578 | Academic Year 2026/2027
NU578
UNIT 4
GASTROINTESTINAL PHARMACOLOGY EXAM
2026/2027 VERIFIED QUESTIONS
Complete Answer Key • Detailed Rationales • Clinical Pharmacology Reasoning
Herzing University | School of Nursing
NU 578 | Advanced Pharmacology
EXAM TITLE: NU 578 UNIT 4 EXAM 2026/2027 |
GASTROINTESTINAL PHARMACOLOGY | VERIFIED
QUESTIONS
COURSE TITLE: Advanced Pharmacology
ACADEMIC YEAR: 2026/2027
TOTAL QUESTIONS: 75 | CORE DOMAINS: 6 | PASSING
STANDARD: 75% or Higher
COURSE CODE: NU 578
Core Domains:
Gastroesophageal Reflux Disease & Peptic Ulcer Disease Pharmacology • Antiemetic & Prokinetic Agents • Laxatives,
Antidiarrheals & Irritable Bowel Syndrome Therapies • Inflammatory Bowel Disease Pharmacology • Pancreatic &
Biliary Pharmacology • Hepatitis & Hepatic Disorders Pharmacology
Current Graduate Nursing Professional Focus
Multiple-Choice • Scenario Analysis • Applied Gastrointestinal Pharmacology Format
2026/2027 Edition — Aligned with the Herzing University NU 578 Advanced Pharmacology curriculum, AACN
Essentials of Master's Education, and evidence-based gastrointestinal pharmacotherapy standards
© BestSellerStuvia
Academic Year 2026/2027
NU 578 | 2026/2027
© BestSellerStuvia | | NU 578 | Academic Year 2026/2027
, © BestSellerStuvia |
ACTUAL QUESTIONS
Domain 1: Gastroesophageal Reflux Disease & Peptic Ulcer Disease Pharmacology
Question 1. A proton pump inhibitor reduces gastric acid secretion by which primary mechanism?
A. Competitive blockade of histamine H2 receptors on parietal cells
B. Neutralization of existing gastric acid in the lumen
C. Stimulation of prostaglandin E2 synthesis to enhance mucosal defense
D. Irreversible inhibition of the H+/K+-ATPase pump on the parietal cell canalicular membrane
Correct Answer: D
Rationale: PPIs covalently bind and irreversibly inhibit the H+/K+-ATPase (proton pump) on the luminal surface of
parietal cells, blocking the final common pathway of acid secretion regardless of stimulus.
Question 2. Long-term use of proton pump inhibitors is associated with which of the following risks?
A. Hyperkalemia and metabolic alkalosis
B. Hypercalcemia and nephrolithiasis
C. Thrombocytopenia and agranulocytosis
D. Hypomagnesemia, vitamin B12 deficiency, and increased Clostridioides difficile infection risk
Correct Answer: D
Rationale: Chronic PPI therapy reduces gastric acidity, impairing absorption of magnesium and protein-bound vitamin
B12 and altering gut flora, thereby elevating risk of C. difficile infection and fractures.
Question 3. Famotidine exerts its therapeutic effect by:
A. Reversible competitive antagonism of histamine at H2 receptors on parietal cells
B. Irreversible inhibition of the proton pump
C. Formation of a physical barrier over the ulcer base
D. Stimulation of bicarbonate secretion
Correct Answer: A
Rationale: H2-receptor antagonists are competitive, reversible blockers of histamine at parietal-cell H2 receptors,
reducing both basal and stimulated acid secretion.
Question 4. Which agent forms a viscous, protective complex that adheres to the ulcer crater in an acidic
environment?
A. Misoprostol
B. Sucralfate
C. Omeprazole
D. Ranitidine
Correct Answer: B
Rationale: Sucralfate polymerizes in acid to form a paste-like barrier that binds preferentially to ulcerated mucosa,
protecting it from acid, pepsin, and bile.
Question 5. Misoprostol is contraindicated in pregnancy primarily because it:
A. Stimulates uterine contractions and can induce abortion
B. Causes severe constipation
C. Produces irreversible renal toxicity
D. Antagonizes oxytocin receptors
Correct Answer: A
Rationale: Misoprostol is a prostaglandin E1 analog that increases uterine tone and contractility; it is therefore
absolutely contraindicated in pregnancy.
Question 6. The preferred first-line regimen for eradication of Helicobacter pylori in a treatment-naïve
patient without penicillin allergy typically includes:
A. A PPI plus clarithromycin and amoxicillin (or metronidazole)
B. Sucralfate monotherapy for 14 days
C. An H2RA plus bismuth only
© BestSellerStuvia | | NU 578 | Academic Year 2026/2027
, © BestSellerStuvia |
D. High-dose PPI monotherapy
Correct Answer: A
Rationale: Clarithromycin-based triple therapy (PPI + clarithromycin + amoxicillin) remains a first-line option when
local resistance rates are low and the patient has no prior macrolide exposure.
Question 7. Which statement regarding timing of PPI administration is most accurate?
A. PPIs should be taken with food to enhance absorption
B. PPIs should be administered at bedtime only
C. PPIs are most effective when taken 30–60 minutes before the first meal of the day
D. Food has no effect on PPI efficacy
Correct Answer: C
Rationale: PPIs require activation by acid and are most effective when taken before a meal so that newly synthesized
proton pumps are inhibited as they are inserted into the canalicular membrane.
Question 8. Antacids containing aluminum hydroxide are most likely to cause which adverse effect?
A. Constipation
B. Diarrhea
C. Hypercalcemia
D. Metabolic acidosis
Correct Answer: A
Rationale: Aluminum salts tend to produce constipation, whereas magnesium salts tend to produce diarrhea;
combination products are often used to balance these effects.
Question 9. Calcium carbonate antacids can produce which clinically important effect when taken in
large quantities with milk?
A. Hypocalcemia
B. Severe hypophosphatemia only
C. Iron-deficiency anemia
D. Milk-alkali syndrome (hypercalcemia, metabolic alkalosis, renal injury)
Correct Answer: D
Rationale: Excessive calcium carbonate intake, especially with dairy, can lead to milk-alkali syndrome characterized by
hypercalcemia, alkalosis, and acute kidney injury.
Question 10. Which of the following is a key counseling point for patients starting a PPI for GERD?
A. Use the lowest effective dose for the shortest duration consistent with treatment goals and reassess need periodically
B. Discontinue the drug abruptly after symptom resolution to avoid rebound
C. Take the medication only when symptoms occur (on-demand only for all patients)
D. Combine with an H2RA at the same time of day for synergistic effect
Correct Answer: A
Rationale: Guideline-directed care emphasizes the lowest effective PPI dose and periodic reassessment to minimize long-
term risks while controlling symptoms and preventing complications.
Question 11. A proton pump inhibitor reduces gastric acid secretion by which primary mechanism?
(clinical scenario 1)
A. Competitive blockade of histamine H2 receptors on parietal cells
B. Neutralization of existing gastric acid in the lumen
C. Irreversible inhibition of the H+/K+-ATPase pump on the parietal cell canalicular membrane
D. Stimulation of prostaglandin E2 synthesis to enhance mucosal defense
Correct Answer: C
Rationale: PPIs covalently bind and irreversibly inhibit the H+/K+-ATPase (proton pump) on the luminal surface of
parietal cells, blocking the final common pathway of acid secretion regardless of stimulus.
Question 12. Long-term use of proton pump inhibitors is associated with which of the following risks?
(clinical scenario 2)
A. Hyperkalemia and metabolic alkalosis
© BestSellerStuvia | | NU 578 | Academic Year 2026/2027
