NUR 2063 Pathophysiology Final Exam
Official Practice Exam Actual Exam
2026/2027 with Detailed Rationales |
Complete Exam-Style Questions | Pass
Guaranteed – A+ Graded
══════════════════════════════════════
SECTION 1: CELLULAR PATHOPHYSIOLOGY & INFLAMMATION Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A 62-year-old male with a 40-pack-year smoking history presents with chronic cough and
dyspnea. A lung biopsy reveals enlarged alveolar cells with increased cytoplasmic volume
and prominent nucleoli. His physician explains that these cellular changes represent an
adaptive response to chronic hypoxia and tobacco irritants. Which intracellular mechanism
best explains this adaptive process?
A. Accumulation of misfolded proteins triggering the unfolded protein response
B. Upregulation of growth factor receptors leading to uncontrolled cellular division
C. Increased synthesis of structural proteins and organelles in response to functional
demand ✓ CORRECT
D. Conversion of one differentiated cell type to another within the same epithelial lineage
Correct Answer: C
Rationale: Hypertrophy is an adaptive increase in cell size driven by increased protein
synthesis and organelle biogenesis to meet heightened functional demands, as seen in
chronic lung disease. Option A describes the pathophysiology of endoplasmic reticulum
stress and cellular injury, not adaptation. In clinical practice, distinguishing hypertrophy from
hyperplasia requires noting that hypertrophy increases cell size without necessarily
increasing cell number.
Question 2 of 50
A 28-year-old woman is admitted 24 hours after sustaining a crush injury to her right thigh in a
motor vehicle accident. She complains of severe pain disproportionate to the injury, and her
urine appears dark amber. Laboratory studies reveal a serum potassium of 6.2 mEq/L,
,creatinine kinase of 45,000 U/L, and myoglobinuria on dipstick. Which pathophysiologic
process is the primary driver of her acute kidney injury?
A. Direct tubular obstruction by myoglobin pigment leading to intraluminal cast formation
B. Precipitation of myoglobin in acidic urine, generating free radicals and causing direct
nephrotoxicity ✓ CORRECT
C. Systemic vasoconstriction from massive catecholamine release reducing renal perfusion
D. Immune-mediated glomerular basement membrane attack triggered by rhabdomyolysis
antigens
Correct Answer: B
Rationale: In rhabdomyolysis, myoglobin is filtered by the glomerulus and precipitates in
acidic tubular fluid, where it dissociates into ferrihemate and generates reactive oxygen
species that directly damage tubular epithelium. Option A describes an important contributing
factor but not the primary nephrotoxic mechanism; obstruction alone does not fully explain
the acute tubular necrosis pattern. Exam writers often pair rhabdomyolysis with hypovolemia,
so recognizing that nephrotoxicity—not hypoperfusion—is the dominant insult is critical.
Question 3 of 50
A 45-year-old man with alcoholic cirrhosis presents with confusion, asterixis, and a flapping
tremor. His arterial blood gas reveals a pH of 7.48, PaCO2 of 30 mmHg, and HCO3 of 22
mEq/L. Which underlying pathophysiologic mechanism best explains his acid-base
disturbance?
A. Direct stimulation of central chemoreceptors by ammonia metabolites increasing
ventilatory drive ✓ CORRECT
B. Lactate accumulation from impaired hepatic clearance generating a metabolic acidosis
C. Hypoalbuminemia causing a reduced anion gap and compensatory respiratory alkalosis
D. Renal bicarbonate wasting from secondary hyperaldosteronism in portal hypertension
Correct Answer: A
Rationale: Hepatic encephalopathy elevates blood ammonia, which crosses the blood-brain
barrier and directly stimulates the medullary respiratory center, producing primary
hyperventilation and respiratory alkalosis. Option B would generate a metabolic acidosis with
low bicarbonate and compensatory hypocapnia, but the pH here is alkalotic, not acidotic.
When ABG values show alkalemia with hypocapnia and normal bicarbonate, always consider
primary respiratory alkalosis before mixed disorders.
Question 4 of 50
A 70-year-old woman receiving chemotherapy for metastatic breast cancer develops painful
oral ulcers, alopecia, and severe neutropenia. A biopsy of the oral mucosa shows scattered
, individual cells with shrunken, eosinophilic cytoplasm and pyknotic nuclei. Which cellular
process is being demonstrated?
A. Coagulative necrosis from ischemic injury to the oral mucosal epithelium
B. Apoptosis triggered by DNA damage and activation of intrinsic caspase pathways ✓
CORRECT
C. Liquefactive necrosis from enzymatic autodigestion of mucosal tissue
D. Caseous necrosis from granulomatous inflammation secondary to infection
Correct Answer: B
Rationale: Chemotherapy-induced DNA damage activates the intrinsic mitochondrial pathway
of apoptosis, producing shrunken cells with condensed chromatin and intact
membranes—morphologic hallmarks of programmed cell death. Option A describes
coagulative necrosis, which preserves cellular outlines and results from ischemia, not
cytotoxic drug injury. The single-cell pattern of death with preserved tissue architecture is the
classic histologic clue distinguishing apoptosis from necrosis.
Question 5 of 50
A 19-year-old college student develops a tender, erythematous abscess on his forearm 48
hours after a minor laceration during football practice. Histologic examination reveals
abundant neutrophils, liquefied tissue, and bacterial colonies. Which vasoactive mediator is
most responsible for the pronounced vasodilation and increased vascular permeability
observed at this wound site?
A. Bradykinin generated via the contact activation pathway of the coagulation cascade
B. Histamine released from mast cell degranulation in immediate hypersensitivity reactions
C. Prostaglandin E2 synthesized by cyclooxygenase-2 in endothelial cells
D. Histamine and complement-derived C3a and C5a triggering endothelial gap formation ✓
CORRECT
Correct Answer: D
Rationale: In acute bacterial inflammation, histamine and anaphylatoxins (C3a, C5a) induce
rapid endothelial retraction and gap formation, producing the characteristic rubor and edema
of acute inflammation. Option B is partially correct but incomplete; histamine alone does not
account for the sustained permeability seen in suppurative inflammation, whereas
complement activation amplifies the response. On exams, look for the combination of
histamine and complement when describing the vascular phase of acute inflammation to
bacterial pathogens.
Question 6 of 50
A 55-year-old man with poorly controlled type 2 diabetes presents with nonhealing ulcers on
his feet. Wound biopsy shows delayed granulation tissue formation, reduced fibroblast
Official Practice Exam Actual Exam
2026/2027 with Detailed Rationales |
Complete Exam-Style Questions | Pass
Guaranteed – A+ Graded
══════════════════════════════════════
SECTION 1: CELLULAR PATHOPHYSIOLOGY & INFLAMMATION Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A 62-year-old male with a 40-pack-year smoking history presents with chronic cough and
dyspnea. A lung biopsy reveals enlarged alveolar cells with increased cytoplasmic volume
and prominent nucleoli. His physician explains that these cellular changes represent an
adaptive response to chronic hypoxia and tobacco irritants. Which intracellular mechanism
best explains this adaptive process?
A. Accumulation of misfolded proteins triggering the unfolded protein response
B. Upregulation of growth factor receptors leading to uncontrolled cellular division
C. Increased synthesis of structural proteins and organelles in response to functional
demand ✓ CORRECT
D. Conversion of one differentiated cell type to another within the same epithelial lineage
Correct Answer: C
Rationale: Hypertrophy is an adaptive increase in cell size driven by increased protein
synthesis and organelle biogenesis to meet heightened functional demands, as seen in
chronic lung disease. Option A describes the pathophysiology of endoplasmic reticulum
stress and cellular injury, not adaptation. In clinical practice, distinguishing hypertrophy from
hyperplasia requires noting that hypertrophy increases cell size without necessarily
increasing cell number.
Question 2 of 50
A 28-year-old woman is admitted 24 hours after sustaining a crush injury to her right thigh in a
motor vehicle accident. She complains of severe pain disproportionate to the injury, and her
urine appears dark amber. Laboratory studies reveal a serum potassium of 6.2 mEq/L,
,creatinine kinase of 45,000 U/L, and myoglobinuria on dipstick. Which pathophysiologic
process is the primary driver of her acute kidney injury?
A. Direct tubular obstruction by myoglobin pigment leading to intraluminal cast formation
B. Precipitation of myoglobin in acidic urine, generating free radicals and causing direct
nephrotoxicity ✓ CORRECT
C. Systemic vasoconstriction from massive catecholamine release reducing renal perfusion
D. Immune-mediated glomerular basement membrane attack triggered by rhabdomyolysis
antigens
Correct Answer: B
Rationale: In rhabdomyolysis, myoglobin is filtered by the glomerulus and precipitates in
acidic tubular fluid, where it dissociates into ferrihemate and generates reactive oxygen
species that directly damage tubular epithelium. Option A describes an important contributing
factor but not the primary nephrotoxic mechanism; obstruction alone does not fully explain
the acute tubular necrosis pattern. Exam writers often pair rhabdomyolysis with hypovolemia,
so recognizing that nephrotoxicity—not hypoperfusion—is the dominant insult is critical.
Question 3 of 50
A 45-year-old man with alcoholic cirrhosis presents with confusion, asterixis, and a flapping
tremor. His arterial blood gas reveals a pH of 7.48, PaCO2 of 30 mmHg, and HCO3 of 22
mEq/L. Which underlying pathophysiologic mechanism best explains his acid-base
disturbance?
A. Direct stimulation of central chemoreceptors by ammonia metabolites increasing
ventilatory drive ✓ CORRECT
B. Lactate accumulation from impaired hepatic clearance generating a metabolic acidosis
C. Hypoalbuminemia causing a reduced anion gap and compensatory respiratory alkalosis
D. Renal bicarbonate wasting from secondary hyperaldosteronism in portal hypertension
Correct Answer: A
Rationale: Hepatic encephalopathy elevates blood ammonia, which crosses the blood-brain
barrier and directly stimulates the medullary respiratory center, producing primary
hyperventilation and respiratory alkalosis. Option B would generate a metabolic acidosis with
low bicarbonate and compensatory hypocapnia, but the pH here is alkalotic, not acidotic.
When ABG values show alkalemia with hypocapnia and normal bicarbonate, always consider
primary respiratory alkalosis before mixed disorders.
Question 4 of 50
A 70-year-old woman receiving chemotherapy for metastatic breast cancer develops painful
oral ulcers, alopecia, and severe neutropenia. A biopsy of the oral mucosa shows scattered
, individual cells with shrunken, eosinophilic cytoplasm and pyknotic nuclei. Which cellular
process is being demonstrated?
A. Coagulative necrosis from ischemic injury to the oral mucosal epithelium
B. Apoptosis triggered by DNA damage and activation of intrinsic caspase pathways ✓
CORRECT
C. Liquefactive necrosis from enzymatic autodigestion of mucosal tissue
D. Caseous necrosis from granulomatous inflammation secondary to infection
Correct Answer: B
Rationale: Chemotherapy-induced DNA damage activates the intrinsic mitochondrial pathway
of apoptosis, producing shrunken cells with condensed chromatin and intact
membranes—morphologic hallmarks of programmed cell death. Option A describes
coagulative necrosis, which preserves cellular outlines and results from ischemia, not
cytotoxic drug injury. The single-cell pattern of death with preserved tissue architecture is the
classic histologic clue distinguishing apoptosis from necrosis.
Question 5 of 50
A 19-year-old college student develops a tender, erythematous abscess on his forearm 48
hours after a minor laceration during football practice. Histologic examination reveals
abundant neutrophils, liquefied tissue, and bacterial colonies. Which vasoactive mediator is
most responsible for the pronounced vasodilation and increased vascular permeability
observed at this wound site?
A. Bradykinin generated via the contact activation pathway of the coagulation cascade
B. Histamine released from mast cell degranulation in immediate hypersensitivity reactions
C. Prostaglandin E2 synthesized by cyclooxygenase-2 in endothelial cells
D. Histamine and complement-derived C3a and C5a triggering endothelial gap formation ✓
CORRECT
Correct Answer: D
Rationale: In acute bacterial inflammation, histamine and anaphylatoxins (C3a, C5a) induce
rapid endothelial retraction and gap formation, producing the characteristic rubor and edema
of acute inflammation. Option B is partially correct but incomplete; histamine alone does not
account for the sustained permeability seen in suppurative inflammation, whereas
complement activation amplifies the response. On exams, look for the combination of
histamine and complement when describing the vascular phase of acute inflammation to
bacterial pathogens.
Question 6 of 50
A 55-year-old man with poorly controlled type 2 diabetes presents with nonhealing ulcers on
his feet. Wound biopsy shows delayed granulation tissue formation, reduced fibroblast
