NR547 Advanced
Pathophysiology Final Exam Prep
(Original APRN-Level Questions)
Advanced Disease Mechanisms & Clinical Reasoning
Question 1
A 58-year-old patient with long-standing hypertension develops left ventricular hypertrophy
(LVH). Which pathophysiologic mechanism is primarily responsible for this adaptation?
A. Increased myocardial apoptosis
B. Increased cardiomyocyte size due to pressure overload
C. Decreased protein synthesis in cardiac muscle
D. Reduced ventricular wall thickness
Correct Answer: B
Rationale:
Chronic hypertension increases afterload, forcing the left ventricle to work harder.
Cardiomyocytes respond by enlarging (hypertrophy), resulting in increased ventricular wall
thickness.
● A: Apoptosis contributes to heart failure progression but is not the primary adaptation.
● C: Protein synthesis increases during hypertrophy.
● D: Ventricular wall thickness increases, not decreases.
Question 2
A patient with uncontrolled type 2 diabetes presents with polyuria. Which mechanism best
explains this symptom?
,A. Increased antidiuretic hormone secretion
B. Osmotic diuresis caused by excess glucose in renal tubules
C. Increased aldosterone activity
D. Decreased glomerular filtration rate
Correct Answer: B
Rationale:
Hyperglycemia exceeds the renal threshold for glucose reabsorption, causing glucose to remain
in the urine and draw water with it through osmotic diuresis.
● A: ADH would reduce urine output.
● C: Aldosterone promotes sodium retention.
● D: Reduced GFR typically decreases urine production.
Question 3
A patient develops septic shock following a bloodstream infection. Which pathophysiologic
event occurs first?
A. Massive vasodilation due to inflammatory mediators
B. Cardiac arrest
C. Severe pulmonary fibrosis
D. Increased erythropoietin production
Correct Answer: A
Rationale:
Inflammatory cytokines released during sepsis cause widespread vasodilation, increased
vascular permeability, and hypotension.
● B: Cardiac arrest is a late complication.
● C: Pulmonary fibrosis is unrelated to acute septic shock.
● D: Erythropoietin production is not a primary event.
Question 4
Which electrolyte imbalance is most likely to cause peaked T waves on an ECG?
,A. Hypokalemia
B. Hyperkalemia
C. Hyponatremia
D. Hypocalcemia
Correct Answer: B
Rationale:
Hyperkalemia affects cardiac conduction and commonly produces peaked T waves, widening
QRS complexes, and potentially fatal arrhythmias.
● A: Hypokalemia causes flattened T waves.
● C: Hyponatremia primarily affects neurologic function.
● D: Hypocalcemia prolongs the QT interval.
Question 5
A patient with chronic kidney disease develops anemia. What is the primary pathophysiologic
cause?
A. Excessive iron absorption
B. Increased destruction of red blood cells
C. Reduced erythropoietin production by the kidneys
D. Increased platelet production
Correct Answer: C
Rationale:
Healthy kidneys produce erythropoietin, which stimulates red blood cell production. Damaged
kidneys produce insufficient amounts, resulting in anemia.
● A: Iron absorption is not the primary issue.
● B: RBC destruction is not the main mechanism.
● D: Platelets are unrelated to erythropoietin.
Question 6
, A patient with chronic obstructive pulmonary disease (COPD) develops respiratory acidosis.
Which arterial blood gas finding is expected?
A. Low PaCO₂ and elevated pH
B. High PaCO₂ and low pH
C. High HCO₃⁻ and elevated pH only
D. Low PaCO₂ and low pH
Correct Answer: B
Rationale:
COPD causes carbon dioxide retention, resulting in elevated PaCO₂ and decreased blood pH.
● A: Indicates respiratory alkalosis.
● C: May occur as compensation but not the primary finding.
● D: Does not fit respiratory acidosis.
Question 7
A patient experiences an acute myocardial infarction. Which biomarker rises earliest?
A. Troponin
B. Albumin
C. Hemoglobin
D. Bilirubin
Correct Answer: A
Rationale:
Cardiac troponins are highly sensitive and specific markers of myocardial injury.
● B, C, D: Not indicators of acute myocardial necrosis.
Question 8
A patient with cirrhosis develops ascites. What is the primary mechanism?
A. Increased plasma oncotic pressure
B. Decreased albumin production causing fluid shifts
Pathophysiology Final Exam Prep
(Original APRN-Level Questions)
Advanced Disease Mechanisms & Clinical Reasoning
Question 1
A 58-year-old patient with long-standing hypertension develops left ventricular hypertrophy
(LVH). Which pathophysiologic mechanism is primarily responsible for this adaptation?
A. Increased myocardial apoptosis
B. Increased cardiomyocyte size due to pressure overload
C. Decreased protein synthesis in cardiac muscle
D. Reduced ventricular wall thickness
Correct Answer: B
Rationale:
Chronic hypertension increases afterload, forcing the left ventricle to work harder.
Cardiomyocytes respond by enlarging (hypertrophy), resulting in increased ventricular wall
thickness.
● A: Apoptosis contributes to heart failure progression but is not the primary adaptation.
● C: Protein synthesis increases during hypertrophy.
● D: Ventricular wall thickness increases, not decreases.
Question 2
A patient with uncontrolled type 2 diabetes presents with polyuria. Which mechanism best
explains this symptom?
,A. Increased antidiuretic hormone secretion
B. Osmotic diuresis caused by excess glucose in renal tubules
C. Increased aldosterone activity
D. Decreased glomerular filtration rate
Correct Answer: B
Rationale:
Hyperglycemia exceeds the renal threshold for glucose reabsorption, causing glucose to remain
in the urine and draw water with it through osmotic diuresis.
● A: ADH would reduce urine output.
● C: Aldosterone promotes sodium retention.
● D: Reduced GFR typically decreases urine production.
Question 3
A patient develops septic shock following a bloodstream infection. Which pathophysiologic
event occurs first?
A. Massive vasodilation due to inflammatory mediators
B. Cardiac arrest
C. Severe pulmonary fibrosis
D. Increased erythropoietin production
Correct Answer: A
Rationale:
Inflammatory cytokines released during sepsis cause widespread vasodilation, increased
vascular permeability, and hypotension.
● B: Cardiac arrest is a late complication.
● C: Pulmonary fibrosis is unrelated to acute septic shock.
● D: Erythropoietin production is not a primary event.
Question 4
Which electrolyte imbalance is most likely to cause peaked T waves on an ECG?
,A. Hypokalemia
B. Hyperkalemia
C. Hyponatremia
D. Hypocalcemia
Correct Answer: B
Rationale:
Hyperkalemia affects cardiac conduction and commonly produces peaked T waves, widening
QRS complexes, and potentially fatal arrhythmias.
● A: Hypokalemia causes flattened T waves.
● C: Hyponatremia primarily affects neurologic function.
● D: Hypocalcemia prolongs the QT interval.
Question 5
A patient with chronic kidney disease develops anemia. What is the primary pathophysiologic
cause?
A. Excessive iron absorption
B. Increased destruction of red blood cells
C. Reduced erythropoietin production by the kidneys
D. Increased platelet production
Correct Answer: C
Rationale:
Healthy kidneys produce erythropoietin, which stimulates red blood cell production. Damaged
kidneys produce insufficient amounts, resulting in anemia.
● A: Iron absorption is not the primary issue.
● B: RBC destruction is not the main mechanism.
● D: Platelets are unrelated to erythropoietin.
Question 6
, A patient with chronic obstructive pulmonary disease (COPD) develops respiratory acidosis.
Which arterial blood gas finding is expected?
A. Low PaCO₂ and elevated pH
B. High PaCO₂ and low pH
C. High HCO₃⁻ and elevated pH only
D. Low PaCO₂ and low pH
Correct Answer: B
Rationale:
COPD causes carbon dioxide retention, resulting in elevated PaCO₂ and decreased blood pH.
● A: Indicates respiratory alkalosis.
● C: May occur as compensation but not the primary finding.
● D: Does not fit respiratory acidosis.
Question 7
A patient experiences an acute myocardial infarction. Which biomarker rises earliest?
A. Troponin
B. Albumin
C. Hemoglobin
D. Bilirubin
Correct Answer: A
Rationale:
Cardiac troponins are highly sensitive and specific markers of myocardial injury.
● B, C, D: Not indicators of acute myocardial necrosis.
Question 8
A patient with cirrhosis develops ascites. What is the primary mechanism?
A. Increased plasma oncotic pressure
B. Decreased albumin production causing fluid shifts
