NR 507 FINAL EXAM – ADVANCED
PATHOPHYSIOLOGY QUESTIONS & ANSWERS
STUDY GUIDE (2026) CHAMBERLAIN
1. A 70-year-old patient with left-sided heart failure primarily develops
pulmonary congestion because of which mechanism?
A) Inadequate forward flow from the left ventricle with blood backing up
into the pulmonary circulation
B) Peripheral vasodilation and pooling of blood in the legs
C) Increased right ventricular output
D) Decreased pulmonary venous return
Correct Answer: A) Inadequate forward flow from the left ventricle with blood
backing up into the pulmonary circulation
Rationale: Left-sided heart failure reduces the left ventricle's ability to
pump blood forward, causing increased left atrial and pulmonary venous
pressures. This results in fluid accumulation in the pulmonary interstitium
and alveoli. The clinical manifestations include dyspnea, orthopnea, and
crackles.
2. A 60-year-old man with uncontrolled hypertension develops an enlarged
heart. This increase in cardiac muscle mass is primarily due to which
cellular adaptation?
A) Hyperplasia
B) Hypertrophy
C) Atrophy
D) Metaplasia
,Correct Answer: B) Hypertrophy
Rationale: Cardiac muscle cells are terminally differentiated and cannot
increase in number. In response to chronic pressure overload from
hypertension, the cells enlarge through hypertrophy. This adaptation
initially maintains cardiac output but can become pathologic and progress
to heart failure.
3. An older adult with a COPD exacerbation has an arterial blood gas
showing pH 7.31, PaCO2 55 mm Hg, and HCO3 28 mEq/L. Which acid-
base imbalance is present?
A) Metabolic acidosis
B) Respiratory alkalosis
C) Respiratory acidosis
D) Metabolic alkalosis
Correct Answer: C) Respiratory acidosis
Rationale: The low pH indicates acidosis, and the elevated PaCO2
identifies a respiratory origin. The elevated bicarbonate reflects renal
compensation. This pattern is typical of COPD exacerbations, in which
alveolar hypoventilation leads to carbon dioxide retention.
4. A patient with refractory GERD is prescribed omeprazole. What is the
primary mechanism of action of this medication?
A) Increasing lower esophageal sphincter pressure
B) Neutralizing gastric acid
C) Enhancing gastric emptying
,D) Inhibiting gastric acid secretion at the hydrogen-potassium ATPase pump
Correct Answer: D) Inhibiting gastric acid secretion at the hydrogen-potassium
ATPase pump
Rationale: Omeprazole is a proton pump inhibitor that irreversibly inhibits
the hydrogen-potassium ATPase pump in parietal cells. This produces
potent and prolonged suppression of gastric acid secretion. It directly
addresses the acid-mediated mucosal injury of GERD.
5. A patient with chronic GERD develops Barrett esophagus, in which
normal squamous epithelium is replaced by columnar epithelium. This
cellular change is best classified as which adaptation?
A) Metaplasia
B) Hyperplasia
C) Dysplasia
D) Anaplasia
Correct Answer: A) Metaplasia
Rationale: Metaplasia is the reversible replacement of one differentiated
cell type with another in response to chronic irritation. In Barrett
esophagus, acid exposure causes the distal esophagus to replace
squamous cells with columnar cells. This adaptation increases the risk of
dysplasia and adenocarcinoma.
6. A patient has heart failure with jugular venous distention, hepatomegaly,
and peripheral edema. Which type of heart failure is most likely?
, A) Left-sided
B) Right-sided
C) Systolic only
D) Diastolic only
Correct Answer: B) Right-sided
Rationale: Right-sided heart failure causes systemic venous congestion,
leading to jugular venous distention, hepatomegaly, and peripheral
edema. Left-sided heart failure primarily causes pulmonary congestion.
Right-sided failure often develops secondary to left-sided failure.
7. A child with asthma has wheezing and reversible airflow obstruction.
Which pathophysiologic process is primarily responsible?
A) Chronic alveolar destruction
B) Alpha-1 antitrypsin deficiency
C) Bronchial hyperresponsiveness and airway inflammation
D) Loss of ciliated epithelium
Correct Answer: C) Bronchial hyperresponsiveness and airway inflammation
Rationale: Asthma is characterized by chronic airway inflammation, bronchial
hyperresponsiveness, and reversible airflow obstruction. Triggers cause
bronchoconstriction, mucus production, and airway edema. These processes
produce wheezing and dyspnea.
PATHOPHYSIOLOGY QUESTIONS & ANSWERS
STUDY GUIDE (2026) CHAMBERLAIN
1. A 70-year-old patient with left-sided heart failure primarily develops
pulmonary congestion because of which mechanism?
A) Inadequate forward flow from the left ventricle with blood backing up
into the pulmonary circulation
B) Peripheral vasodilation and pooling of blood in the legs
C) Increased right ventricular output
D) Decreased pulmonary venous return
Correct Answer: A) Inadequate forward flow from the left ventricle with blood
backing up into the pulmonary circulation
Rationale: Left-sided heart failure reduces the left ventricle's ability to
pump blood forward, causing increased left atrial and pulmonary venous
pressures. This results in fluid accumulation in the pulmonary interstitium
and alveoli. The clinical manifestations include dyspnea, orthopnea, and
crackles.
2. A 60-year-old man with uncontrolled hypertension develops an enlarged
heart. This increase in cardiac muscle mass is primarily due to which
cellular adaptation?
A) Hyperplasia
B) Hypertrophy
C) Atrophy
D) Metaplasia
,Correct Answer: B) Hypertrophy
Rationale: Cardiac muscle cells are terminally differentiated and cannot
increase in number. In response to chronic pressure overload from
hypertension, the cells enlarge through hypertrophy. This adaptation
initially maintains cardiac output but can become pathologic and progress
to heart failure.
3. An older adult with a COPD exacerbation has an arterial blood gas
showing pH 7.31, PaCO2 55 mm Hg, and HCO3 28 mEq/L. Which acid-
base imbalance is present?
A) Metabolic acidosis
B) Respiratory alkalosis
C) Respiratory acidosis
D) Metabolic alkalosis
Correct Answer: C) Respiratory acidosis
Rationale: The low pH indicates acidosis, and the elevated PaCO2
identifies a respiratory origin. The elevated bicarbonate reflects renal
compensation. This pattern is typical of COPD exacerbations, in which
alveolar hypoventilation leads to carbon dioxide retention.
4. A patient with refractory GERD is prescribed omeprazole. What is the
primary mechanism of action of this medication?
A) Increasing lower esophageal sphincter pressure
B) Neutralizing gastric acid
C) Enhancing gastric emptying
,D) Inhibiting gastric acid secretion at the hydrogen-potassium ATPase pump
Correct Answer: D) Inhibiting gastric acid secretion at the hydrogen-potassium
ATPase pump
Rationale: Omeprazole is a proton pump inhibitor that irreversibly inhibits
the hydrogen-potassium ATPase pump in parietal cells. This produces
potent and prolonged suppression of gastric acid secretion. It directly
addresses the acid-mediated mucosal injury of GERD.
5. A patient with chronic GERD develops Barrett esophagus, in which
normal squamous epithelium is replaced by columnar epithelium. This
cellular change is best classified as which adaptation?
A) Metaplasia
B) Hyperplasia
C) Dysplasia
D) Anaplasia
Correct Answer: A) Metaplasia
Rationale: Metaplasia is the reversible replacement of one differentiated
cell type with another in response to chronic irritation. In Barrett
esophagus, acid exposure causes the distal esophagus to replace
squamous cells with columnar cells. This adaptation increases the risk of
dysplasia and adenocarcinoma.
6. A patient has heart failure with jugular venous distention, hepatomegaly,
and peripheral edema. Which type of heart failure is most likely?
, A) Left-sided
B) Right-sided
C) Systolic only
D) Diastolic only
Correct Answer: B) Right-sided
Rationale: Right-sided heart failure causes systemic venous congestion,
leading to jugular venous distention, hepatomegaly, and peripheral
edema. Left-sided heart failure primarily causes pulmonary congestion.
Right-sided failure often develops secondary to left-sided failure.
7. A child with asthma has wheezing and reversible airflow obstruction.
Which pathophysiologic process is primarily responsible?
A) Chronic alveolar destruction
B) Alpha-1 antitrypsin deficiency
C) Bronchial hyperresponsiveness and airway inflammation
D) Loss of ciliated epithelium
Correct Answer: C) Bronchial hyperresponsiveness and airway inflammation
Rationale: Asthma is characterized by chronic airway inflammation, bronchial
hyperresponsiveness, and reversible airflow obstruction. Triggers cause
bronchoconstriction, mucus production, and airway edema. These processes
produce wheezing and dyspnea.
