NR 507 – Advanced Pathophysiology EXAM QUESTIONS
& ANSWERS 2025/2026 ( A+ GRADED 100% VERIFIED)
,NR 507 – ADVANCED PATHOPHYSIOLOGY
15 TOUGHEST & MOST-TESTED CASE-BASED QUESTIONS
1. Cellular Injury – Reversible vs Irreversible
A patient experiences myocardial ischemia for 20 minutes. Cellular findings include ATP depletion,
cellular swelling, and lactic acidosis, but intact cell membranes.
Which type of injury is occurring?
A. Apoptosis
B. Irreversible cell injury
C. Reversible cell injury
D. Necrosis
✅ Correct Answer: C
Rationale:
Early ischemia causes reversible injury characterized by ATP depletion, anaerobic metabolism, and cell
swelling. Membrane rupture = irreversible injury.
2. Hypoxia – Pathophysiologic Sequence
Which cellular event occurs first during hypoxic injury?
A. Mitochondrial membrane rupture
B. ATP depletion
C. Lysosomal enzyme release
D. Nuclear fragmentation
✅ Correct Answer: B
Rationale:
Hypoxia → ↓ oxidative phosphorylation → ATP depletion, which triggers all downstream injury.
3. Inflammation – Acute vs Chronic
A patient with rheumatoid arthritis has macrophage infiltration, fibrosis, and tissue destruction.
Which type of inflammation is present?
A. Acute
B. Granulomatous
C. Chronic
D. Systemic
, ✅ Correct Answer: C
Rationale:
Chronic inflammation involves macrophages, lymphocytes, fibroblast activation, and tissue destruction.
4. Cytokines – Sepsis Mechanism
Which cytokine is most responsible for vasodilation, capillary leak, and hypotension in septic shock?
A. Interleukin-2
B. Tumor necrosis factor-alpha (TNF-α)
C. Interferon-gamma
D. Interleukin-10
✅ Correct Answer: B
Rationale:
TNF-α drives endothelial dysfunction, nitric oxide release, and distributive shock.
5. Acid–Base Disorders – Metabolic Acidosis
A patient with diabetic ketoacidosis presents with Kussmaul respirations.
What is the primary compensatory mechanism?
A. Renal bicarbonate retention
B. Respiratory CO₂ retention
C. Respiratory CO₂ elimination
D. Increased aldosterone release
✅ Correct Answer: C
Rationale:
Metabolic acidosis → hyperventilation to blow off CO₂ (respiratory compensation).
6. Respiratory Acidosis – Renal Response
Which renal response compensates for chronic respiratory acidosis?
A. Decreased bicarbonate reabsorption
B. Increased hydrogen ion secretion
C. Decreased hydrogen ion secretion
D. Increased potassium excretion only
✅ Correct Answer: B
& ANSWERS 2025/2026 ( A+ GRADED 100% VERIFIED)
,NR 507 – ADVANCED PATHOPHYSIOLOGY
15 TOUGHEST & MOST-TESTED CASE-BASED QUESTIONS
1. Cellular Injury – Reversible vs Irreversible
A patient experiences myocardial ischemia for 20 minutes. Cellular findings include ATP depletion,
cellular swelling, and lactic acidosis, but intact cell membranes.
Which type of injury is occurring?
A. Apoptosis
B. Irreversible cell injury
C. Reversible cell injury
D. Necrosis
✅ Correct Answer: C
Rationale:
Early ischemia causes reversible injury characterized by ATP depletion, anaerobic metabolism, and cell
swelling. Membrane rupture = irreversible injury.
2. Hypoxia – Pathophysiologic Sequence
Which cellular event occurs first during hypoxic injury?
A. Mitochondrial membrane rupture
B. ATP depletion
C. Lysosomal enzyme release
D. Nuclear fragmentation
✅ Correct Answer: B
Rationale:
Hypoxia → ↓ oxidative phosphorylation → ATP depletion, which triggers all downstream injury.
3. Inflammation – Acute vs Chronic
A patient with rheumatoid arthritis has macrophage infiltration, fibrosis, and tissue destruction.
Which type of inflammation is present?
A. Acute
B. Granulomatous
C. Chronic
D. Systemic
, ✅ Correct Answer: C
Rationale:
Chronic inflammation involves macrophages, lymphocytes, fibroblast activation, and tissue destruction.
4. Cytokines – Sepsis Mechanism
Which cytokine is most responsible for vasodilation, capillary leak, and hypotension in septic shock?
A. Interleukin-2
B. Tumor necrosis factor-alpha (TNF-α)
C. Interferon-gamma
D. Interleukin-10
✅ Correct Answer: B
Rationale:
TNF-α drives endothelial dysfunction, nitric oxide release, and distributive shock.
5. Acid–Base Disorders – Metabolic Acidosis
A patient with diabetic ketoacidosis presents with Kussmaul respirations.
What is the primary compensatory mechanism?
A. Renal bicarbonate retention
B. Respiratory CO₂ retention
C. Respiratory CO₂ elimination
D. Increased aldosterone release
✅ Correct Answer: C
Rationale:
Metabolic acidosis → hyperventilation to blow off CO₂ (respiratory compensation).
6. Respiratory Acidosis – Renal Response
Which renal response compensates for chronic respiratory acidosis?
A. Decreased bicarbonate reabsorption
B. Increased hydrogen ion secretion
C. Decreased hydrogen ion secretion
D. Increased potassium excretion only
✅ Correct Answer: B
