NR 507 Final Exam Prep (2026) |
Chamberlain Pathophysiology – Actual
Questions And Rationales (PDF), Exams of
Pathophysiology
Section 1: Advanced Respiratory Pathophysiology (Questions 1–30)
1. A 62-year-old male with a 40-pack-year smoking history presents with
progressive dyspnea, chronic cough, and barrel-shaped chest. Spirometry
shows FEV1/FVC ratio of 55% with minimal improvement post-
bronchodilator. Which of the following best describes the underlying
pathophysiology?
A) Reversible airway inflammation with eosinophilic infiltration
B) Alveolar wall destruction and loss of elastic recoil with fixed airway
obstruction
C) Interstitial fibrosis with reduced diffusion capacity
D) Pulmonary vascular remodeling with increased pulmonary artery
pressure
Answer: B) Alveolar wall destruction and loss of elastic recoil with
fixed airway obstruction
Rationale: This presentation is classic for COPD (emphysema
phenotype). The pathophysiology involves destruction of alveolar
walls due to protease-antiprotease imbalance (typically from
smoking-induced neutrophil elastase release), loss of elastic recoil,
and fixed airway obstruction. Unlike asthma, obstruction is not fully
reversible.
,2. Which of the following best explains the mechanism of alpha-1 antitrypsin
deficiency in the development of emphysema?
A) Increased production of elastase leading to alveolar destruction
B) Uninhibited neutrophil elastase activity causing proteolytic
destruction of alveolar walls
C) Excessive collagen deposition in the interstitium
D) Impaired surfactant production leading to alveolar collapse
Answer: B) Uninhibited neutrophil elastase activity causing
proteolytic destruction of alveolar walls
Rationale: Alpha-1 antitrypsin (AAT) is a serine protease inhibitor that
normally inhibits neutrophil elastase. In AAT deficiency, neutrophil
elastase is unchecked, leading to proteolytic destruction of alveolar
walls, particularly in the lower lobes.
3. A patient with severe COPD has an elevated hematocrit of 55%. What is
the most likely underlying mechanism?
A) Iron deficiency anemia
B) Chronic hypoxemia leading to increased erythropoietin production
C) Dehydration from increased work of breathing
D) Polycythemia vera
Answer: B) Chronic hypoxemia leading to increased erythropoietin
production
Rationale: Chronic hypoxemia in advanced COPD stimulates renal
erythropoietin production, leading to secondary polycythemia
,(erythrocytosis) as a compensatory mechanism to increase oxygen-
carrying capacity.
4. Which of the following is a characteristic finding in patients with chronic
bronchitis?
A) Pink puffers with weight loss
B) Blue bloaters with peripheral edema
C) Normal arterial blood gases
D) Predominant upper lobe destruction
Answer: B) Blue bloaters with peripheral edema
Rationale: Chronic bronchitis (blue bloater phenotype) is
characterized by chronic cough with sputum production, hypoxemia,
hypercapnia, cyanosis, and eventually cor pulmonale with peripheral
edema. "Pink puffers" describe emphysema phenotype.
5. A patient with COPD has a PaO2 of 55 mmHg and PaCO2 of 52 mmHg on
room air. Which of the following best describes the mechanism of
hypoxemia in this patient?
A) Diffusion impairment
B) Ventilation-perfusion (V/Q) mismatch
C) Right-to-left shunt
D) Hypoventilation
Answer: B) Ventilation-perfusion (V/Q) mismatch
Rationale: V/Q mismatch is the primary mechanism of hypoxemia in
COPD. Areas with low V/Q (poor ventilation relative to perfusion)
, result in hypoxemia. Hypercapnia may also occur as disease
progresses.
6. Which of the following is the most sensitive diagnostic test for detecting
emphysema in a patient with early COPD?
A) Chest x-ray
B) Spirometry
C) High-resolution computed tomography (HRCT)
D) Diffusion capacity of the lung for carbon monoxide (DLCO)
Answer: C) High-resolution computed tomography (HRCT)
Rationale: HRCT is the most sensitive imaging modality for detecting
emphysematous changes (parenchymal destruction) and is more
sensitive than chest x-ray or spirometry for identifying early structural
changes.
7. A patient with asthma develops worsening symptoms after starting a beta-
blocker for hypertension. Which of the following best explains this reaction?
A) Beta-blockers cause direct bronchial smooth muscle contraction
B) Beta-blockers block beta-2 receptors, preventing bronchodilation
C) Beta-blockers increase histamine release
D) Beta-blockers cause pulmonary edema
Answer: B) Beta-blockers block beta-2 receptors, preventing
bronchodilation
Rationale: Nonselective beta-blockers block beta-2 adrenergic
receptors in bronchial smooth muscle, preventing sympathetic
Chamberlain Pathophysiology – Actual
Questions And Rationales (PDF), Exams of
Pathophysiology
Section 1: Advanced Respiratory Pathophysiology (Questions 1–30)
1. A 62-year-old male with a 40-pack-year smoking history presents with
progressive dyspnea, chronic cough, and barrel-shaped chest. Spirometry
shows FEV1/FVC ratio of 55% with minimal improvement post-
bronchodilator. Which of the following best describes the underlying
pathophysiology?
A) Reversible airway inflammation with eosinophilic infiltration
B) Alveolar wall destruction and loss of elastic recoil with fixed airway
obstruction
C) Interstitial fibrosis with reduced diffusion capacity
D) Pulmonary vascular remodeling with increased pulmonary artery
pressure
Answer: B) Alveolar wall destruction and loss of elastic recoil with
fixed airway obstruction
Rationale: This presentation is classic for COPD (emphysema
phenotype). The pathophysiology involves destruction of alveolar
walls due to protease-antiprotease imbalance (typically from
smoking-induced neutrophil elastase release), loss of elastic recoil,
and fixed airway obstruction. Unlike asthma, obstruction is not fully
reversible.
,2. Which of the following best explains the mechanism of alpha-1 antitrypsin
deficiency in the development of emphysema?
A) Increased production of elastase leading to alveolar destruction
B) Uninhibited neutrophil elastase activity causing proteolytic
destruction of alveolar walls
C) Excessive collagen deposition in the interstitium
D) Impaired surfactant production leading to alveolar collapse
Answer: B) Uninhibited neutrophil elastase activity causing
proteolytic destruction of alveolar walls
Rationale: Alpha-1 antitrypsin (AAT) is a serine protease inhibitor that
normally inhibits neutrophil elastase. In AAT deficiency, neutrophil
elastase is unchecked, leading to proteolytic destruction of alveolar
walls, particularly in the lower lobes.
3. A patient with severe COPD has an elevated hematocrit of 55%. What is
the most likely underlying mechanism?
A) Iron deficiency anemia
B) Chronic hypoxemia leading to increased erythropoietin production
C) Dehydration from increased work of breathing
D) Polycythemia vera
Answer: B) Chronic hypoxemia leading to increased erythropoietin
production
Rationale: Chronic hypoxemia in advanced COPD stimulates renal
erythropoietin production, leading to secondary polycythemia
,(erythrocytosis) as a compensatory mechanism to increase oxygen-
carrying capacity.
4. Which of the following is a characteristic finding in patients with chronic
bronchitis?
A) Pink puffers with weight loss
B) Blue bloaters with peripheral edema
C) Normal arterial blood gases
D) Predominant upper lobe destruction
Answer: B) Blue bloaters with peripheral edema
Rationale: Chronic bronchitis (blue bloater phenotype) is
characterized by chronic cough with sputum production, hypoxemia,
hypercapnia, cyanosis, and eventually cor pulmonale with peripheral
edema. "Pink puffers" describe emphysema phenotype.
5. A patient with COPD has a PaO2 of 55 mmHg and PaCO2 of 52 mmHg on
room air. Which of the following best describes the mechanism of
hypoxemia in this patient?
A) Diffusion impairment
B) Ventilation-perfusion (V/Q) mismatch
C) Right-to-left shunt
D) Hypoventilation
Answer: B) Ventilation-perfusion (V/Q) mismatch
Rationale: V/Q mismatch is the primary mechanism of hypoxemia in
COPD. Areas with low V/Q (poor ventilation relative to perfusion)
, result in hypoxemia. Hypercapnia may also occur as disease
progresses.
6. Which of the following is the most sensitive diagnostic test for detecting
emphysema in a patient with early COPD?
A) Chest x-ray
B) Spirometry
C) High-resolution computed tomography (HRCT)
D) Diffusion capacity of the lung for carbon monoxide (DLCO)
Answer: C) High-resolution computed tomography (HRCT)
Rationale: HRCT is the most sensitive imaging modality for detecting
emphysematous changes (parenchymal destruction) and is more
sensitive than chest x-ray or spirometry for identifying early structural
changes.
7. A patient with asthma develops worsening symptoms after starting a beta-
blocker for hypertension. Which of the following best explains this reaction?
A) Beta-blockers cause direct bronchial smooth muscle contraction
B) Beta-blockers block beta-2 receptors, preventing bronchodilation
C) Beta-blockers increase histamine release
D) Beta-blockers cause pulmonary edema
Answer: B) Beta-blockers block beta-2 receptors, preventing
bronchodilation
Rationale: Nonselective beta-blockers block beta-2 adrenergic
receptors in bronchial smooth muscle, preventing sympathetic
