NR507 NP Midterm Exam Questions | Verified Answers
with Detailed Rationales (2026/2027 Edition)
Total Questions: 50 | Time: 90 min | Pass: 80%
TABLE OF CONTENTS
Section 1 | Advanced Pathophysiology – Cellular & Genetic Basis | Q1 – Q10
Section 2 | Cardiovascular & Respiratory Pathophysiology | Q11 – Q20
Section 3 | Endocrine & Metabolic Disorders | Q21 – Q30
Section 4 | Neurological & Musculoskeletal Pathophysiology | Q31 – Q40
Section 5 | Renal, Gastrointestinal & Immune System Disorders | Q41 – Q50
Instructions: Choose the single best answer. Pass: 80% in 90 minutes.
══════════════════════════════════════
SECTION 1: ADVANCED PATHOPHYSIOLOGY – CELLULAR & GENETIC BASIS Q1
– Q10
══════════════════════════════════════
Question 1 of 50
A 58-year-old man presents to the ED 3 hours after onset of crushing chest pain. He
receives PCI with stent placement. Twelve hours later, his cardiac enzymes rise higher
than expected and his rhythm becomes unstable. The NP recognizes this pattern as
reflecting which underlying cellular mechanism?
A. Anaerobic glycolysis leading to lactic acid accumulation
B. Reperfusion injury driven by oxygen free radical generation ✓ CORRECT
C. Coagulative necrosis caused by prolonged ischemia alone
D. Apoptosis triggered by mitochondrial DNA fragmentation
Correct Answer: B
Rationale: Reperfusion injury occurs when oxygen is reintroduced to ischemic tissue,
generating reactive oxygen species that damage cell membranes and proteins beyond
the initial ischemic insult. While coagulative necrosis does result from ischemia, the
,delayed worsening after revascularization specifically points to free radical-mediated
reperfusion damage. Clinicians must monitor post-PCI patients closely for this
phenomenon, as it can worsen outcomes despite successful revascularization.
Question 2 of 50
A couple is referred for genetic counseling after their first child is diagnosed with cystic
fibrosis. Neither parent has the disease. The NP explains that if they have another child,
what is the probability that this child will be a carrier but not develop the disease?
A. 50% ✓ CORRECT
B. 25%
C. 75%
D. 33%
Correct Answer: A
Rationale: Cystic fibrosis follows an autosomal recessive pattern, meaning both parents
are heterozygous carriers with a 50% chance of passing the mutated allele to each child;
a child receiving one mutated allele becomes a carrier without expressing the disease.
The 25% figure represents the chance of having an affected child with two mutated
alleles, which is a different outcome. Genetic counseling helps families understand
recurrence risks and consider carrier screening for future reproductive decisions.
Question 3 of 50
A 67-year-old woman with a 40 pack-year smoking history develops a lung mass. Biopsy
reveals small cell carcinoma. The NP understands that this tumor type most commonly
arises from mutations affecting which category of genes?
A. Proto-oncogenes that accelerate cell cycling uncontrollably
B. DNA repair genes that fail to correct replication errors
C. Tumor suppressor genes that normally regulate apoptosis and cell cycle checkpoints
✓ CORRECT
,D. Telomerase genes that prevent chromosomal end shortening
Correct Answer: C
Rationale: Small cell lung carcinoma is strongly associated with inactivation of tumor
suppressor genes such as TP53 and RB1, which normally control cell cycle progression
and initiate apoptosis in damaged cells. Proto-oncogene mutations are more
characteristic of non-small cell lung cancers like adenocarcinoma with EGFR mutations.
Understanding the genetic basis helps explain why small cell carcinoma is so
aggressive and why targeted therapies differ from other lung cancer types.
Question 4 of 50
A 34-year-old woman with systemic lupus erythematosus has recurrent flares
characterized by joint pain and rash. During a flare, complement levels drop
significantly. The NP recognizes that complement activation in this setting primarily
contributes to tissue injury through which mechanism?
A. Direct neutralization of autoantibodies by C3b opsonization
B. Mast cell degranulation triggered by C5a anaphylatoxin
C. Formation of membrane attack complexes on host cell surfaces ✓ CORRECT
D. Recruitment of Th2 lymphocytes by C4a chemotaxis
Correct Answer: C
Rationale: In SLE, immune complex deposition activates the classical complement
pathway, leading to formation of membrane attack complexes that lyse host cells and
amplify inflammation. While C5a does act as an anaphylatoxin, the primary
tissue-destructive mechanism in lupus nephritis and other organ involvement is direct
cell lysis via MAC formation. Monitoring complement levels helps clinicians gauge
disease activity, as consumption during flares correlates with organ damage.
Question 5 of 50
, A 45-year-old marathon runner develops left ventricular hypertrophy on
echocardiogram. His blood pressure is normal. The NP explains that this cardiac
adaptation represents which type of cellular change?
A. Hyperplasia resulting from increased myocardial cell division
B. Hypertrophy driven by increased workload and protein synthesis within existing cells
✓ CORRECT
C. Metaplasia converting cardiac muscle to stress-resistant fiber types
D. Dysplasia characterized by disordered myocardial architecture
Correct Answer: B
Rationale: Cardiac muscle cells are terminally differentiated and cannot undergo
hyperplasia, so the heart responds to increased demand through hypertrophy, where
individual cells increase in size via enhanced protein synthesis. Hyperplasia occurs in
tissues with regenerative capacity such as the liver or endometrium, not in mature
cardiac myocytes. This distinction matters clinically because physiologic hypertrophy in
athletes typically regresses with detraining, unlike pathologic hypertrophy from
hypertension.
Question 6 of 50
A 6-year-old child develops wheezing and urticaria within minutes of eating peanuts.
The parents report similar reactions to legumes. The NP recognizes this reaction as
involving which immunologic mechanism?
A. IgE-mediated mast cell degranulation with histamine release ✓ CORRECT
B. IgG immune complex deposition activating the classical complement pathway
C. Cytotoxic T-cell destruction of gastrointestinal epithelial cells
D. Immune complex formation triggering neutrophil-mediated tissue damage
Correct Answer: A
Rationale: Peanut allergy represents a type I hypersensitivity reaction in which
allergen-specific IgE binds mast cells and basophils, triggering rapid degranulation and
with Detailed Rationales (2026/2027 Edition)
Total Questions: 50 | Time: 90 min | Pass: 80%
TABLE OF CONTENTS
Section 1 | Advanced Pathophysiology – Cellular & Genetic Basis | Q1 – Q10
Section 2 | Cardiovascular & Respiratory Pathophysiology | Q11 – Q20
Section 3 | Endocrine & Metabolic Disorders | Q21 – Q30
Section 4 | Neurological & Musculoskeletal Pathophysiology | Q31 – Q40
Section 5 | Renal, Gastrointestinal & Immune System Disorders | Q41 – Q50
Instructions: Choose the single best answer. Pass: 80% in 90 minutes.
══════════════════════════════════════
SECTION 1: ADVANCED PATHOPHYSIOLOGY – CELLULAR & GENETIC BASIS Q1
– Q10
══════════════════════════════════════
Question 1 of 50
A 58-year-old man presents to the ED 3 hours after onset of crushing chest pain. He
receives PCI with stent placement. Twelve hours later, his cardiac enzymes rise higher
than expected and his rhythm becomes unstable. The NP recognizes this pattern as
reflecting which underlying cellular mechanism?
A. Anaerobic glycolysis leading to lactic acid accumulation
B. Reperfusion injury driven by oxygen free radical generation ✓ CORRECT
C. Coagulative necrosis caused by prolonged ischemia alone
D. Apoptosis triggered by mitochondrial DNA fragmentation
Correct Answer: B
Rationale: Reperfusion injury occurs when oxygen is reintroduced to ischemic tissue,
generating reactive oxygen species that damage cell membranes and proteins beyond
the initial ischemic insult. While coagulative necrosis does result from ischemia, the
,delayed worsening after revascularization specifically points to free radical-mediated
reperfusion damage. Clinicians must monitor post-PCI patients closely for this
phenomenon, as it can worsen outcomes despite successful revascularization.
Question 2 of 50
A couple is referred for genetic counseling after their first child is diagnosed with cystic
fibrosis. Neither parent has the disease. The NP explains that if they have another child,
what is the probability that this child will be a carrier but not develop the disease?
A. 50% ✓ CORRECT
B. 25%
C. 75%
D. 33%
Correct Answer: A
Rationale: Cystic fibrosis follows an autosomal recessive pattern, meaning both parents
are heterozygous carriers with a 50% chance of passing the mutated allele to each child;
a child receiving one mutated allele becomes a carrier without expressing the disease.
The 25% figure represents the chance of having an affected child with two mutated
alleles, which is a different outcome. Genetic counseling helps families understand
recurrence risks and consider carrier screening for future reproductive decisions.
Question 3 of 50
A 67-year-old woman with a 40 pack-year smoking history develops a lung mass. Biopsy
reveals small cell carcinoma. The NP understands that this tumor type most commonly
arises from mutations affecting which category of genes?
A. Proto-oncogenes that accelerate cell cycling uncontrollably
B. DNA repair genes that fail to correct replication errors
C. Tumor suppressor genes that normally regulate apoptosis and cell cycle checkpoints
✓ CORRECT
,D. Telomerase genes that prevent chromosomal end shortening
Correct Answer: C
Rationale: Small cell lung carcinoma is strongly associated with inactivation of tumor
suppressor genes such as TP53 and RB1, which normally control cell cycle progression
and initiate apoptosis in damaged cells. Proto-oncogene mutations are more
characteristic of non-small cell lung cancers like adenocarcinoma with EGFR mutations.
Understanding the genetic basis helps explain why small cell carcinoma is so
aggressive and why targeted therapies differ from other lung cancer types.
Question 4 of 50
A 34-year-old woman with systemic lupus erythematosus has recurrent flares
characterized by joint pain and rash. During a flare, complement levels drop
significantly. The NP recognizes that complement activation in this setting primarily
contributes to tissue injury through which mechanism?
A. Direct neutralization of autoantibodies by C3b opsonization
B. Mast cell degranulation triggered by C5a anaphylatoxin
C. Formation of membrane attack complexes on host cell surfaces ✓ CORRECT
D. Recruitment of Th2 lymphocytes by C4a chemotaxis
Correct Answer: C
Rationale: In SLE, immune complex deposition activates the classical complement
pathway, leading to formation of membrane attack complexes that lyse host cells and
amplify inflammation. While C5a does act as an anaphylatoxin, the primary
tissue-destructive mechanism in lupus nephritis and other organ involvement is direct
cell lysis via MAC formation. Monitoring complement levels helps clinicians gauge
disease activity, as consumption during flares correlates with organ damage.
Question 5 of 50
, A 45-year-old marathon runner develops left ventricular hypertrophy on
echocardiogram. His blood pressure is normal. The NP explains that this cardiac
adaptation represents which type of cellular change?
A. Hyperplasia resulting from increased myocardial cell division
B. Hypertrophy driven by increased workload and protein synthesis within existing cells
✓ CORRECT
C. Metaplasia converting cardiac muscle to stress-resistant fiber types
D. Dysplasia characterized by disordered myocardial architecture
Correct Answer: B
Rationale: Cardiac muscle cells are terminally differentiated and cannot undergo
hyperplasia, so the heart responds to increased demand through hypertrophy, where
individual cells increase in size via enhanced protein synthesis. Hyperplasia occurs in
tissues with regenerative capacity such as the liver or endometrium, not in mature
cardiac myocytes. This distinction matters clinically because physiologic hypertrophy in
athletes typically regresses with detraining, unlike pathologic hypertrophy from
hypertension.
Question 6 of 50
A 6-year-old child develops wheezing and urticaria within minutes of eating peanuts.
The parents report similar reactions to legumes. The NP recognizes this reaction as
involving which immunologic mechanism?
A. IgE-mediated mast cell degranulation with histamine release ✓ CORRECT
B. IgG immune complex deposition activating the classical complement pathway
C. Cytotoxic T-cell destruction of gastrointestinal epithelial cells
D. Immune complex formation triggering neutrophil-mediated tissue damage
Correct Answer: A
Rationale: Peanut allergy represents a type I hypersensitivity reaction in which
allergen-specific IgE binds mast cells and basophils, triggering rapid degranulation and
