,UTA NURS 5315 Exam 3 | Advanced Pathophysiology (2026)
Q&A
1. Which of the following best describes the primary mechanism of pulmonary edema in left-
sided heart failure?
A) Accumulation of air in the pleural space due to alveolar rupture
B) Increased capillary hydrostatic pressure forcing fluid into the alveoli
C) Destruction of alveolar walls leading to enlarged air spaces
D) Bronchoconstriction and excessive mucus production in the airways
Correct Answer: Increased capillary hydrostatic pressure forcing fluid into the alveoli
Rationale: In left-sided heart failure, reduced cardiac output causes blood to back up into the
pulmonary circulation, increasing capillary hydrostatic pressure. This pressure forces fluid
out of the capillaries and into the alveoli, impairing gas exchange and causing dyspnea,
orthopnea, and crackles. Air accumulation in the pleural space is pneumothorax, alveolar
destruction is emphysema, and bronchoconstriction is asthma.
2. What is the primary pathophysiologic difference between restrictive and obstructive
pulmonary disorders?
A) Restrictive disorders impair exhalation, while obstructive disorders impair inhalation
B) Restrictive disorders impair inhalation with low lung volumes, while obstructive disorders
impair exhalation with high lung volumes
C) Restrictive disorders involve airway inflammation, while obstructive disorders involve
fibrosis
D) Restrictive disorders increase lung compliance, while obstructive disorders decrease it
Correct Answer: Restrictive disorders impair inhalation with low lung volumes, while
obstructive disorders impair exhalation with high lung volumes
,Rationale: Restrictive pulmonary disorders, such as pulmonary fibrosis and atelectasis, are
characterized by an inability to fully expand the lungs during inhalation, resulting in low lung
volumes on pulmonary function tests. Obstructive disorders, such as asthma and COPD,
involve difficulty exhaling air due to airway narrowing or collapse, leading to air trapping
and high lung volumes.
3. A nurse is assessing a patient with chronic bronchitis. Which pathophysiologic change is
most characteristic of this condition?
A) Destruction of alveolar walls and loss of elastic recoil
B) Hyperplasia of bronchial mucous glands with excessive mucus production
C) Reversible bronchospasm triggered by allergens
D) Fibrotic thickening of the alveolar-capillary membrane
Correct Answer: Hyperplasia of bronchial mucous glands with excessive mucus production
Rationale: Chronic bronchitis is characterized by hyperplasia of bronchial mucous glands,
excessive mucus production, and a chronic productive cough lasting at least three months in
two consecutive years. Alveolar destruction is the hallmark of emphysema, reversible
bronchospasm is asthma, and fibrotic thickening occurs in interstitial lung diseases.
4. What is the most likely consequence of a pulmonary embolism?
A) Increased blood flow to the affected lung region
B) Impaired gas exchange and right ventricular strain
C) Enhanced oxygenation due to compensatory mechanisms
D) Decreased pulmonary artery pressure
Correct Answer: Impaired gas exchange and right ventricular strain
Rationale: A pulmonary embolism obstructs pulmonary blood flow, creating a ventilation-
perfusion mismatch that impairs gas exchange. The obstruction also increases pulmonary
, vascular resistance, straining the right ventricle and potentially causing right heart failure. It
decreases, not increases, blood flow to the affected area.
5. According to the principles of gas exchange, what is the primary function of surfactant in
the alveoli?
A) Increasing surface tension to promote alveolar expansion
B) Reducing surface tension to prevent alveolar collapse
C) Transporting oxygen across the alveolar membrane
D) Filtering particulate matter from inspired air
Correct Answer: Reducing surface tension to prevent alveolar collapse
Rationale: Surfactant is produced by type II pneumocytes and reduces surface tension within
the alveoli, preventing their collapse during expiration. A deficiency of surfactant, as seen in
premature infants, leads to respiratory distress syndrome. Surfactant does not increase surface
tension, transport oxygen, or filter particulates.
6. In the context of acute respiratory distress syndrome (ARDS), what is the primary
pathophysiologic change?
A) Increased surfactant production
B) Diffuse alveolar damage with increased capillary permeability
C) Bronchoconstriction without inflammation
D) Chronic fibrosis of the lung interstitium
Correct Answer: Diffuse alveolar damage with increased capillary permeability
Rationale: ARDS is characterized by diffuse alveolar damage, increased pulmonary capillary
permeability, and the formation of protein-rich pulmonary edema. This leads to severe
hypoxemia and respiratory failure. It is not caused by increased surfactant, isolated
bronchoconstriction, or chronic fibrosis.
Q&A
1. Which of the following best describes the primary mechanism of pulmonary edema in left-
sided heart failure?
A) Accumulation of air in the pleural space due to alveolar rupture
B) Increased capillary hydrostatic pressure forcing fluid into the alveoli
C) Destruction of alveolar walls leading to enlarged air spaces
D) Bronchoconstriction and excessive mucus production in the airways
Correct Answer: Increased capillary hydrostatic pressure forcing fluid into the alveoli
Rationale: In left-sided heart failure, reduced cardiac output causes blood to back up into the
pulmonary circulation, increasing capillary hydrostatic pressure. This pressure forces fluid
out of the capillaries and into the alveoli, impairing gas exchange and causing dyspnea,
orthopnea, and crackles. Air accumulation in the pleural space is pneumothorax, alveolar
destruction is emphysema, and bronchoconstriction is asthma.
2. What is the primary pathophysiologic difference between restrictive and obstructive
pulmonary disorders?
A) Restrictive disorders impair exhalation, while obstructive disorders impair inhalation
B) Restrictive disorders impair inhalation with low lung volumes, while obstructive disorders
impair exhalation with high lung volumes
C) Restrictive disorders involve airway inflammation, while obstructive disorders involve
fibrosis
D) Restrictive disorders increase lung compliance, while obstructive disorders decrease it
Correct Answer: Restrictive disorders impair inhalation with low lung volumes, while
obstructive disorders impair exhalation with high lung volumes
,Rationale: Restrictive pulmonary disorders, such as pulmonary fibrosis and atelectasis, are
characterized by an inability to fully expand the lungs during inhalation, resulting in low lung
volumes on pulmonary function tests. Obstructive disorders, such as asthma and COPD,
involve difficulty exhaling air due to airway narrowing or collapse, leading to air trapping
and high lung volumes.
3. A nurse is assessing a patient with chronic bronchitis. Which pathophysiologic change is
most characteristic of this condition?
A) Destruction of alveolar walls and loss of elastic recoil
B) Hyperplasia of bronchial mucous glands with excessive mucus production
C) Reversible bronchospasm triggered by allergens
D) Fibrotic thickening of the alveolar-capillary membrane
Correct Answer: Hyperplasia of bronchial mucous glands with excessive mucus production
Rationale: Chronic bronchitis is characterized by hyperplasia of bronchial mucous glands,
excessive mucus production, and a chronic productive cough lasting at least three months in
two consecutive years. Alveolar destruction is the hallmark of emphysema, reversible
bronchospasm is asthma, and fibrotic thickening occurs in interstitial lung diseases.
4. What is the most likely consequence of a pulmonary embolism?
A) Increased blood flow to the affected lung region
B) Impaired gas exchange and right ventricular strain
C) Enhanced oxygenation due to compensatory mechanisms
D) Decreased pulmonary artery pressure
Correct Answer: Impaired gas exchange and right ventricular strain
Rationale: A pulmonary embolism obstructs pulmonary blood flow, creating a ventilation-
perfusion mismatch that impairs gas exchange. The obstruction also increases pulmonary
, vascular resistance, straining the right ventricle and potentially causing right heart failure. It
decreases, not increases, blood flow to the affected area.
5. According to the principles of gas exchange, what is the primary function of surfactant in
the alveoli?
A) Increasing surface tension to promote alveolar expansion
B) Reducing surface tension to prevent alveolar collapse
C) Transporting oxygen across the alveolar membrane
D) Filtering particulate matter from inspired air
Correct Answer: Reducing surface tension to prevent alveolar collapse
Rationale: Surfactant is produced by type II pneumocytes and reduces surface tension within
the alveoli, preventing their collapse during expiration. A deficiency of surfactant, as seen in
premature infants, leads to respiratory distress syndrome. Surfactant does not increase surface
tension, transport oxygen, or filter particulates.
6. In the context of acute respiratory distress syndrome (ARDS), what is the primary
pathophysiologic change?
A) Increased surfactant production
B) Diffuse alveolar damage with increased capillary permeability
C) Bronchoconstriction without inflammation
D) Chronic fibrosis of the lung interstitium
Correct Answer: Diffuse alveolar damage with increased capillary permeability
Rationale: ARDS is characterized by diffuse alveolar damage, increased pulmonary capillary
permeability, and the formation of protein-rich pulmonary edema. This leads to severe
hypoxemia and respiratory failure. It is not caused by increased surfactant, isolated
bronchoconstriction, or chronic fibrosis.
