PNH 301 TEST 2 Official Exam 2026/2027 Actual
Exam Complete Questions and Answers Detailed
Rationales Pass Guaranteed - A+ Graded
TABLE OF CONTENTS
Section 1 | Pathophysiology Core Concepts | Q1 – Q10
Section 2 | Disease Mechanisms and Etiology | Q11 – Q20
Section 3 | Clinical Manifestations and Diagnostics | Q21 – Q30
Section 4 | Treatment Modalities and Pharmacology | Q31 – Q40
Section 5 | Case Studies and Clinical Application | Q41 – Q50
Instructions: Choose the single best answer. Pass: 80% in 90 minutes.
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SECTION 1: PATHOPHYSIOLOGY CORE CONCEPTS Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A 62-year-old man who works in asbestos removal presents with progressive dyspnea
and a persistent dry cough. Histopathology of a lung biopsy reveals elongated,
needle-like fibers trapped within macrophage lysosomes, triggering an inflammatory
cascade and fibroblast proliferation.
A. The macrophages undergo hypertrophy to engulf the fibers and restore normal gas
exchange
B. The fibers cause metaplasia of type I alveolar cells into mucus-secreting goblet cells
C. Chronic inflammation and tissue remodeling lead to pulmonary fibrosis through
dysregulated repair ✓ CORRECT
D. The fibers dissolve within lysosomes and are excreted via the bronchial ciliary
escalator without sequelae
Correct Answer: C
,Rationale: Asbestos fibers are biopersistent and cannot be degraded by macrophage
lysosomes, leading to frustrated phagocytosis, chronic inflammation, and progressive
fibrotic remodeling that characterizes asbestosis. Metaplasia refers to the replacement
of one differentiated cell type with another, but the primary pathology here is fibrosis
rather than epithelial transformation. Occupational health screening with chest imaging
and spirometry is essential for workers with prolonged asbestos exposure because
disease progression can continue even after exposure ceases.
Question 2 of 50
During a laboratory session, a nursing student observes that when a cell is deprived of
oxygen for several minutes, the mitochondria cease oxidative phosphorylation and the
cytoplasm accumulates lactic acid.
A. The cell switches to anaerobic glycolysis to generate limited ATP without oxygen
consumption ✓ CORRECT
B. The cell enters the G0 phase of the cell cycle to conserve energy until perfusion
resumes
C. Aerobic metabolism continues at a reduced rate using stored glycogen and fatty
acids
D. The nucleus immediately initiates apoptosis to prevent ATP waste during hypoxia
Correct Answer: A
Rationale: Oxygen deprivation forces the cell to rely on anaerobic glycolysis in the
cytoplasm, yielding only 2 ATP per glucose molecule compared with 36 ATP from
aerobic respiration, and resulting in lactic acid accumulation. Apoptosis is an
energy-dependent process that requires ATP, so a severely hypoxic cell typically
undergoes necrosis rather than programmed cell death. This metabolic shift explains
why tissues with high oxygen demand, such as the myocardium and cerebral cortex, are
most vulnerable to ischemic injury.
Question 3 of 50
,A 45-year-old woman with systemic lupus erythematosus develops a malar rash and
joint pain. Her antinuclear antibody titer is markedly elevated, and complement levels
are depressed during active disease flares.
A. The immune system fails to recognize self-antigens due to thymic hyperplasia and
excessive T-cell production
B. Autoantibody formation and immune complex deposition cause complement
consumption and tissue injury ✓ CORRECT
C. B-cell lymphopenia prevents adequate antibody production against foreign
pathogens
D. T-suppressor cells are overactive and attack connective tissues directly without
antibody mediation
Correct Answer: B
Rationale: Systemic lupus erythematosus is characterized by loss of self-tolerance,
production of autoantibodies against nuclear antigens, and formation of circulating
immune complexes that deposit in tissues and activate the classical complement
pathway. Thymic hyperplasia and B-cell lymphopenia are not features of lupus; rather,
B-cell hyperactivity and defective clearance of apoptotic debris drive autoantibody
production. Monitoring complement levels and anti-double-stranded DNA titers helps
clinicians gauge disease activity and anticipate renal flares.
Question 4 of 50
A 58-year-old man with chronic heart failure notices that his ankles swell progressively
throughout the day and improve overnight. His jugular venous pressure is elevated, and
he has gained 6 pounds in two weeks.
A. Decreased oncotic pressure from hepatic synthetic failure is causing generalized
ascites
B. Increased hydrostatic pressure in the venous system promotes fluid filtration into
interstitial spaces ✓ CORRECT
C. Lymphatic obstruction from cardiac compression prevents return of tissue fluid to
circulation
, D. Sodium-wasting nephropathy triggers compensatory water retention and intracellular
edema
Correct Answer: B
Rationale: In right-sided heart failure, elevated central venous pressure increases
capillary hydrostatic pressure, favoring net fluid movement out of the vascular space
and into dependent interstitial tissues according to Starling forces. Hepatic synthetic
failure would produce hypoalbuminemia and decreased oncotic pressure, but the
clinical picture here is consistent with venous congestion rather than cirrhosis. Daily
weights and orthostatic edema assessment remain fundamental nursing interventions
for monitoring fluid status in heart failure patients.
Question 5 of 50
A 3-year-old child is brought to the emergency department after ingesting a household
cleaner. Arterial blood gas reveals pH 7.22, pCO2 28 mmHg, and bicarbonate 12 mEq/L.
The child is tachypneic and confused.
A. The child has respiratory acidosis from aspiration pneumonia and alveolar
hypoventilation
B. Metabolic alkalosis from cleaner ingestion is being compensated by hypoventilation
C. A primary metabolic acidosis with appropriate respiratory compensation is present
✓ CORRECT
D. The blood gas is normal for a toddler and requires no specific intervention
Correct Answer: C
Rationale: A low pH with decreased bicarbonate indicates primary metabolic acidosis,
and the low pCO2 reflects compensatory hyperventilation as the respiratory system
attempts to blow off acid and raise the pH toward normal. Respiratory acidosis would
present with elevated pCO2 and decreased pH, which is the opposite of the
compensatory pattern seen here. Ingestion of acidic substances requires immediate
Exam Complete Questions and Answers Detailed
Rationales Pass Guaranteed - A+ Graded
TABLE OF CONTENTS
Section 1 | Pathophysiology Core Concepts | Q1 – Q10
Section 2 | Disease Mechanisms and Etiology | Q11 – Q20
Section 3 | Clinical Manifestations and Diagnostics | Q21 – Q30
Section 4 | Treatment Modalities and Pharmacology | Q31 – Q40
Section 5 | Case Studies and Clinical Application | Q41 – Q50
Instructions: Choose the single best answer. Pass: 80% in 90 minutes.
══════════════════════════════════════
SECTION 1: PATHOPHYSIOLOGY CORE CONCEPTS Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A 62-year-old man who works in asbestos removal presents with progressive dyspnea
and a persistent dry cough. Histopathology of a lung biopsy reveals elongated,
needle-like fibers trapped within macrophage lysosomes, triggering an inflammatory
cascade and fibroblast proliferation.
A. The macrophages undergo hypertrophy to engulf the fibers and restore normal gas
exchange
B. The fibers cause metaplasia of type I alveolar cells into mucus-secreting goblet cells
C. Chronic inflammation and tissue remodeling lead to pulmonary fibrosis through
dysregulated repair ✓ CORRECT
D. The fibers dissolve within lysosomes and are excreted via the bronchial ciliary
escalator without sequelae
Correct Answer: C
,Rationale: Asbestos fibers are biopersistent and cannot be degraded by macrophage
lysosomes, leading to frustrated phagocytosis, chronic inflammation, and progressive
fibrotic remodeling that characterizes asbestosis. Metaplasia refers to the replacement
of one differentiated cell type with another, but the primary pathology here is fibrosis
rather than epithelial transformation. Occupational health screening with chest imaging
and spirometry is essential for workers with prolonged asbestos exposure because
disease progression can continue even after exposure ceases.
Question 2 of 50
During a laboratory session, a nursing student observes that when a cell is deprived of
oxygen for several minutes, the mitochondria cease oxidative phosphorylation and the
cytoplasm accumulates lactic acid.
A. The cell switches to anaerobic glycolysis to generate limited ATP without oxygen
consumption ✓ CORRECT
B. The cell enters the G0 phase of the cell cycle to conserve energy until perfusion
resumes
C. Aerobic metabolism continues at a reduced rate using stored glycogen and fatty
acids
D. The nucleus immediately initiates apoptosis to prevent ATP waste during hypoxia
Correct Answer: A
Rationale: Oxygen deprivation forces the cell to rely on anaerobic glycolysis in the
cytoplasm, yielding only 2 ATP per glucose molecule compared with 36 ATP from
aerobic respiration, and resulting in lactic acid accumulation. Apoptosis is an
energy-dependent process that requires ATP, so a severely hypoxic cell typically
undergoes necrosis rather than programmed cell death. This metabolic shift explains
why tissues with high oxygen demand, such as the myocardium and cerebral cortex, are
most vulnerable to ischemic injury.
Question 3 of 50
,A 45-year-old woman with systemic lupus erythematosus develops a malar rash and
joint pain. Her antinuclear antibody titer is markedly elevated, and complement levels
are depressed during active disease flares.
A. The immune system fails to recognize self-antigens due to thymic hyperplasia and
excessive T-cell production
B. Autoantibody formation and immune complex deposition cause complement
consumption and tissue injury ✓ CORRECT
C. B-cell lymphopenia prevents adequate antibody production against foreign
pathogens
D. T-suppressor cells are overactive and attack connective tissues directly without
antibody mediation
Correct Answer: B
Rationale: Systemic lupus erythematosus is characterized by loss of self-tolerance,
production of autoantibodies against nuclear antigens, and formation of circulating
immune complexes that deposit in tissues and activate the classical complement
pathway. Thymic hyperplasia and B-cell lymphopenia are not features of lupus; rather,
B-cell hyperactivity and defective clearance of apoptotic debris drive autoantibody
production. Monitoring complement levels and anti-double-stranded DNA titers helps
clinicians gauge disease activity and anticipate renal flares.
Question 4 of 50
A 58-year-old man with chronic heart failure notices that his ankles swell progressively
throughout the day and improve overnight. His jugular venous pressure is elevated, and
he has gained 6 pounds in two weeks.
A. Decreased oncotic pressure from hepatic synthetic failure is causing generalized
ascites
B. Increased hydrostatic pressure in the venous system promotes fluid filtration into
interstitial spaces ✓ CORRECT
C. Lymphatic obstruction from cardiac compression prevents return of tissue fluid to
circulation
, D. Sodium-wasting nephropathy triggers compensatory water retention and intracellular
edema
Correct Answer: B
Rationale: In right-sided heart failure, elevated central venous pressure increases
capillary hydrostatic pressure, favoring net fluid movement out of the vascular space
and into dependent interstitial tissues according to Starling forces. Hepatic synthetic
failure would produce hypoalbuminemia and decreased oncotic pressure, but the
clinical picture here is consistent with venous congestion rather than cirrhosis. Daily
weights and orthostatic edema assessment remain fundamental nursing interventions
for monitoring fluid status in heart failure patients.
Question 5 of 50
A 3-year-old child is brought to the emergency department after ingesting a household
cleaner. Arterial blood gas reveals pH 7.22, pCO2 28 mmHg, and bicarbonate 12 mEq/L.
The child is tachypneic and confused.
A. The child has respiratory acidosis from aspiration pneumonia and alveolar
hypoventilation
B. Metabolic alkalosis from cleaner ingestion is being compensated by hypoventilation
C. A primary metabolic acidosis with appropriate respiratory compensation is present
✓ CORRECT
D. The blood gas is normal for a toddler and requires no specific intervention
Correct Answer: C
Rationale: A low pH with decreased bicarbonate indicates primary metabolic acidosis,
and the low pCO2 reflects compensatory hyperventilation as the respiratory system
attempts to blow off acid and raise the pH toward normal. Respiratory acidosis would
present with elevated pCO2 and decreased pH, which is the opposite of the
compensatory pattern seen here. Ingestion of acidic substances requires immediate
