NURS 611 Final Exam V3 | NURS 611
Advanced Pathophysiology | Maryville
University of St. Louis | 2026 Q&A with
Rationale (Maryville NURS611 Final Exam
2026)
1. A 62-year-old male presents with dyspnea on exertion and crackles upon lung auscultation.
A diagnosis of left-sided heart failure is made. Which pathophysiological mechanism explains
these findings?
A. Peripheral edema causing venous congestion
B. Systemic hypertension leading to right ventricular strain
C. Increased pulmonary capillary hydrostatic pressure
D. Decrease in left ventricular end-diastolic volume
Correct Answer: C
Rationale: Left-sided heart failure leads to the inability of the left ventricle to empty
properly, causing blood to back up into the pulmonary circulation. This increase in volume
raises the pulmonary capillary hydrostatic pressure, which forces fluid into the alveolar
spaces. The presence of pulmonary edema is the direct cause of the patient’s crackles and
shortness of breath.
,2. In the development of atherosclerosis, which event occurs immediately after the initial
endothelial injury?
A. Migration of smooth muscle cells to the tunica intima
B. Formation of a fibrous cap over the plaque
C. Rupture of the plaque and thrombus formation
D. Release of cytokines and recruitment of monocytes
Correct Answer: D
Rationale: Following endothelial injury, the vessel wall becomes inflamed and expresses
adhesion molecules. Monocytes are then recruited to the site and migrate into the
subendothelial space. Once inside, they transform into macrophages and begin engulfing
oxidized LDL, initiating the formation of fatty streaks.
3. A patient with emphysema is found to have a deficiency in alpha-1 antitrypsin. What is the
role of this enzyme in the lungs?
A. It stimulates the production of surfactant in the alveoli
B. It increases the surface tension within the terminal bronchioles
C. It promotes the constriction of bronchial smooth muscle
D. It inhibits proteases from breaking down elastin in alveolar walls
Correct Answer: D
, Rationale: Alpha-1 antitrypsin is a protease inhibitor that protects the lung tissue from
being destroyed by neutrophil elastase. In individuals with a deficiency, elastase goes
unchecked and breaks down the elastic fibers in the alveolar walls. This leads to the
permanent enlargement of air spaces and the loss of elastic recoil characteristic of
emphysema.
4. A 24-year-old female experiences an acute asthma attack. Which chemical mediator is
primarily responsible for the immediate bronchoconstriction and mucosal edema?
A. Interleukin-5
B. Leukotrienes
C. Histamine
D. Alpha-fetoprotein
Correct Answer: C
Rationale: Asthma is a type I hypersensitivity reaction involving IgE-mediated mast cell
degranulation. Upon exposure to an allergen, mast cells release histamine, which binds to
H1 receptors on bronchial smooth muscle. This leads to rapid bronchospasm, increased
vascular permeability, and significant airway edema.
5. Which of the following describes the pathophysiology of Acute Respiratory Distress
Syndrome (ARDS) during the exudative phase?
A. Hyperproliferation of type II pneumocytes
B. Fibrosis and remodeling of the lung parenchyma
Advanced Pathophysiology | Maryville
University of St. Louis | 2026 Q&A with
Rationale (Maryville NURS611 Final Exam
2026)
1. A 62-year-old male presents with dyspnea on exertion and crackles upon lung auscultation.
A diagnosis of left-sided heart failure is made. Which pathophysiological mechanism explains
these findings?
A. Peripheral edema causing venous congestion
B. Systemic hypertension leading to right ventricular strain
C. Increased pulmonary capillary hydrostatic pressure
D. Decrease in left ventricular end-diastolic volume
Correct Answer: C
Rationale: Left-sided heart failure leads to the inability of the left ventricle to empty
properly, causing blood to back up into the pulmonary circulation. This increase in volume
raises the pulmonary capillary hydrostatic pressure, which forces fluid into the alveolar
spaces. The presence of pulmonary edema is the direct cause of the patient’s crackles and
shortness of breath.
,2. In the development of atherosclerosis, which event occurs immediately after the initial
endothelial injury?
A. Migration of smooth muscle cells to the tunica intima
B. Formation of a fibrous cap over the plaque
C. Rupture of the plaque and thrombus formation
D. Release of cytokines and recruitment of monocytes
Correct Answer: D
Rationale: Following endothelial injury, the vessel wall becomes inflamed and expresses
adhesion molecules. Monocytes are then recruited to the site and migrate into the
subendothelial space. Once inside, they transform into macrophages and begin engulfing
oxidized LDL, initiating the formation of fatty streaks.
3. A patient with emphysema is found to have a deficiency in alpha-1 antitrypsin. What is the
role of this enzyme in the lungs?
A. It stimulates the production of surfactant in the alveoli
B. It increases the surface tension within the terminal bronchioles
C. It promotes the constriction of bronchial smooth muscle
D. It inhibits proteases from breaking down elastin in alveolar walls
Correct Answer: D
, Rationale: Alpha-1 antitrypsin is a protease inhibitor that protects the lung tissue from
being destroyed by neutrophil elastase. In individuals with a deficiency, elastase goes
unchecked and breaks down the elastic fibers in the alveolar walls. This leads to the
permanent enlargement of air spaces and the loss of elastic recoil characteristic of
emphysema.
4. A 24-year-old female experiences an acute asthma attack. Which chemical mediator is
primarily responsible for the immediate bronchoconstriction and mucosal edema?
A. Interleukin-5
B. Leukotrienes
C. Histamine
D. Alpha-fetoprotein
Correct Answer: C
Rationale: Asthma is a type I hypersensitivity reaction involving IgE-mediated mast cell
degranulation. Upon exposure to an allergen, mast cells release histamine, which binds to
H1 receptors on bronchial smooth muscle. This leads to rapid bronchospasm, increased
vascular permeability, and significant airway edema.
5. Which of the following describes the pathophysiology of Acute Respiratory Distress
Syndrome (ARDS) during the exudative phase?
A. Hyperproliferation of type II pneumocytes
B. Fibrosis and remodeling of the lung parenchyma
