NU 606 Advanced Pathophysiology Practice Exam 1
2026 NU 606 Advanced Pathophysiology
Practice Exam 1 100 Expert Solved
Questions and Answers with Rationales
1. A patient with chronic renal failure develops secondary hyperparathyroidism primarily
because of:
A. Increased calcitonin secretion
B. Hypermagnesemia
C. Phosphate retention and hypocalcemia
D. Excess vitamin D production
Answer: C. Phosphate retention and hypocalcemia
Rationale: Diseased kidneys cannot excrete phosphate effectively, causing hyperphosphatemia.
This lowers serum calcium, stimulating parathyroid hormone (PTH) release.
2. The most immediate compensatory response to metabolic acidosis is:
A. Renal bicarbonate excretion
B. Hyperventilation
C. Increased aldosterone secretion
D. Increased erythropoietin release
Answer: B. Hyperventilation
Rationale: The respiratory system rapidly compensates by eliminating CO₂ through
hyperventilation, reducing carbonic acid concentration.
3. Atherosclerosis begins with:
A. Smooth muscle hypertrophy
B. Platelet destruction
C. Endothelial injury
D. Fibrous cap rupture
Answer: C. Endothelial injury
, NU 606 Advanced Pathophysiology Practice Exam 1
Rationale: Endothelial dysfunction allows lipid infiltration, inflammatory cell migration, and
plaque formation.
4. Which cytokine is most associated with acute systemic inflammation and fever?
A. IL-10
B. TNF-α
C. Erythropoietin
D. Histamine
Answer: B. TNF-α
Rationale: Tumor necrosis factor-alpha is a major pro-inflammatory cytokine responsible for
fever, vascular permeability, and septic shock.
5. Left-sided heart failure commonly causes:
A. Hepatomegaly
B. Peripheral edema only
C. Pulmonary congestion
D. Splenomegaly
Answer: C. Pulmonary congestion
Rationale: Blood backs up into pulmonary circulation when the left ventricle fails, producing
pulmonary edema and dyspnea.
6. In type 1 diabetes mellitus, beta-cell destruction is primarily mediated by:
A. Bacterial toxins
B. Autoimmune mechanisms
C. Obesity
D. Hyperinsulinemia
Answer: B. Autoimmune mechanisms
Rationale: T-cell mediated autoimmune destruction of pancreatic beta cells causes absolute
insulin deficiency.
, NU 606 Advanced Pathophysiology Practice Exam 1
7. Which acid-base disorder is expected in severe diarrhea?
A. Respiratory alkalosis
B. Metabolic alkalosis
C. Metabolic acidosis
D. Respiratory acidosis
Answer: C. Metabolic acidosis
Rationale: Loss of bicarbonate-rich intestinal secretions leads to metabolic acidosis.
8. The hallmark of nephrotic syndrome is:
A. Hematuria
B. Massive proteinuria
C. Oliguria
D. Hypernatremia
Answer: B. Massive proteinuria
Rationale: Nephrotic syndrome involves glomerular membrane damage causing heavy protein
loss (>3.5 g/day).
9. A patient with COPD develops chronic hypercapnia. Renal compensation involves:
A. Increased bicarbonate retention
B. Decreased hydrogen secretion
C. Sodium wasting
D. Increased potassium excretion only
Answer: A. Increased bicarbonate retention
Rationale: Kidneys compensate for chronic respiratory acidosis by retaining bicarbonate.
10. Which mechanism contributes most to edema formation in heart failure?
A. Increased plasma oncotic pressure
B. Decreased hydrostatic pressure
C. Increased capillary hydrostatic pressure
D. Decreased ADH release
2026 NU 606 Advanced Pathophysiology
Practice Exam 1 100 Expert Solved
Questions and Answers with Rationales
1. A patient with chronic renal failure develops secondary hyperparathyroidism primarily
because of:
A. Increased calcitonin secretion
B. Hypermagnesemia
C. Phosphate retention and hypocalcemia
D. Excess vitamin D production
Answer: C. Phosphate retention and hypocalcemia
Rationale: Diseased kidneys cannot excrete phosphate effectively, causing hyperphosphatemia.
This lowers serum calcium, stimulating parathyroid hormone (PTH) release.
2. The most immediate compensatory response to metabolic acidosis is:
A. Renal bicarbonate excretion
B. Hyperventilation
C. Increased aldosterone secretion
D. Increased erythropoietin release
Answer: B. Hyperventilation
Rationale: The respiratory system rapidly compensates by eliminating CO₂ through
hyperventilation, reducing carbonic acid concentration.
3. Atherosclerosis begins with:
A. Smooth muscle hypertrophy
B. Platelet destruction
C. Endothelial injury
D. Fibrous cap rupture
Answer: C. Endothelial injury
, NU 606 Advanced Pathophysiology Practice Exam 1
Rationale: Endothelial dysfunction allows lipid infiltration, inflammatory cell migration, and
plaque formation.
4. Which cytokine is most associated with acute systemic inflammation and fever?
A. IL-10
B. TNF-α
C. Erythropoietin
D. Histamine
Answer: B. TNF-α
Rationale: Tumor necrosis factor-alpha is a major pro-inflammatory cytokine responsible for
fever, vascular permeability, and septic shock.
5. Left-sided heart failure commonly causes:
A. Hepatomegaly
B. Peripheral edema only
C. Pulmonary congestion
D. Splenomegaly
Answer: C. Pulmonary congestion
Rationale: Blood backs up into pulmonary circulation when the left ventricle fails, producing
pulmonary edema and dyspnea.
6. In type 1 diabetes mellitus, beta-cell destruction is primarily mediated by:
A. Bacterial toxins
B. Autoimmune mechanisms
C. Obesity
D. Hyperinsulinemia
Answer: B. Autoimmune mechanisms
Rationale: T-cell mediated autoimmune destruction of pancreatic beta cells causes absolute
insulin deficiency.
, NU 606 Advanced Pathophysiology Practice Exam 1
7. Which acid-base disorder is expected in severe diarrhea?
A. Respiratory alkalosis
B. Metabolic alkalosis
C. Metabolic acidosis
D. Respiratory acidosis
Answer: C. Metabolic acidosis
Rationale: Loss of bicarbonate-rich intestinal secretions leads to metabolic acidosis.
8. The hallmark of nephrotic syndrome is:
A. Hematuria
B. Massive proteinuria
C. Oliguria
D. Hypernatremia
Answer: B. Massive proteinuria
Rationale: Nephrotic syndrome involves glomerular membrane damage causing heavy protein
loss (>3.5 g/day).
9. A patient with COPD develops chronic hypercapnia. Renal compensation involves:
A. Increased bicarbonate retention
B. Decreased hydrogen secretion
C. Sodium wasting
D. Increased potassium excretion only
Answer: A. Increased bicarbonate retention
Rationale: Kidneys compensate for chronic respiratory acidosis by retaining bicarbonate.
10. Which mechanism contributes most to edema formation in heart failure?
A. Increased plasma oncotic pressure
B. Decreased hydrostatic pressure
C. Increased capillary hydrostatic pressure
D. Decreased ADH release
