NR507 Final Exam Advanced Pathophysiology Chamberlain College of
Nursing Question Bank (Latest 2026/2027 Edition) – 100% Correct
Questions, Answers & Detailed Rationales
Total Questions: 75
Time Allowed: 150 Minutes
Select the BEST answer for each question.
SECTION 1: CELLULAR ADAPTATION, INJURY, & NEOPLASIA
Questions 1–9
Question 1
A 68-year-old male with a 40 pack-year smoking history presents with a chronic cough
and hemoptysis. Biopsy of a lung mass reveals squamous cell carcinoma. Which
pathophysiological mechanism best explains the cellular transformation from normal
bronchial epithelium to squamous metaplasia and subsequent dysplasia in this patient?
A. Chronic hypoxia induces cellular hypertrophy followed by hyperplasia
B. Repeated chemical injury causes adaptive metaplasia that progresses through
dysplasia to neoplasia via accumulated genetic mutations
C. Viral infection triggers immediate apoptosis of ciliated cells with subsequent
regeneration
D. Autoimmune destruction of type II pneumocytes leads to compensatory squamous
hyperplasia
Correct Answer: B
,Rationale: Chronic tobacco exposure causes repeated chemical injury to bronchial
epithelium; the normal ciliated pseudostratified columnar epithelium undergoes
protective squamous metaplasia, which with continued carcinogen exposure
accumulates genetic mutations progressing through dysplasia to invasive carcinoma.
Option A is incorrect because hypoxia does not drive this specific metaplastic
sequence. Option C is incorrect because viral infection is not the primary mechanism in
this smoking-related context, and apoptosis would not produce this progressive
transformation. Option D is incorrect because autoimmune mechanisms do not explain
smoking-related squamous cell carcinoma pathogenesis.
Question 2
A 45-year-old female undergoes bilateral mastectomy for breast cancer prevention after
testing positive for BRCA1 mutation. Which pathophysiological concept best explains
why BRCA1 mutation carriers have significantly increased breast cancer risk?
A. BRCA1 is a proto-oncogene that promotes uncontrolled cellular proliferation when
mutated
B. BRCA1 functions as a tumor suppressor gene involved in DNA double-strand break
repair; loss of function permits genomic instability
C. BRCA1 mutation activates telomerase, preventing cellular senescence and enabling
immortalization
D. BRCA1 normally inhibits apoptosis; mutation allows damaged cells to survive and
proliferate
Correct Answer: B
Rationale: BRCA1 is a tumor suppressor gene encoding a protein essential for
homologous recombination repair of DNA double-strand breaks; loss-of-function
mutations permit accumulation of genetic errors and chromosomal instability, driving
carcinogenesis. Option A is incorrect because BRCA1 is not a proto-oncogene. Option C
is incorrect because BRCA1 does not regulate telomerase activity. Option D is incorrect
,because BRCA1 does not primarily function as an apoptosis inhibitor; its core role is
DNA repair fidelity maintenance.
Question 3
A 55-year-old male with chronic hypertension presents with left ventricular hypertrophy
on echocardiography. Which cellular adaptation best describes the increase in
myocardial cell size observed in this patient?
A. Hyperplasia of cardiac myocytes in response to increased afterload
B. Hypertrophy of existing cardiac myocytes due to increased mechanical workload
C. Metaplasia of fibroblasts into cardiac muscle cells
D. Dysplasia of ventricular myocytes with nuclear atypia
Correct Answer: B
Rationale: Cardiac myocytes are terminally differentiated cells incapable of hyperplasia;
chronic pressure overload from hypertension induces hypertrophy of existing myocytes
through increased protein synthesis and sarcomere addition, increasing cell size
without increasing cell number. Option A is incorrect because adult cardiac myocytes
do not undergo hyperplasia. Option C is incorrect because metaplasia does not occur
between fibroblasts and muscle cells. Option D is incorrect because dysplasia implies
premalignant disordered growth, not the compensatory adaptive response to
hemodynamic stress.
Question 4
A 28-year-old trauma patient develops crush injuries to both lower extremities.
Laboratory studies reveal markedly elevated serum potassium, creatinine, and uric acid.
Which pathophysiological mechanism underlies the acute kidney injury in this patient?
A. Direct nephrotoxicity from hemoglobin pigment causing tubular obstruction
B. Prerenal azotemia from hypovolemic shock reducing renal perfusion
, C. Myoglobin release from damaged muscle causing intrarenal tubular obstruction and
direct cytotoxicity
D. Postrenal obstruction from urethral trauma secondary to pelvic fracture
Correct Answer: C
Rationale: Crush injury causes rhabdomyolysis with massive myoglobin release;
myoglobin precipitates in renal tubules causing obstruction, while its heme moiety
generates free radicals causing direct tubular epithelial cytotoxicity, producing acute
kidney injury. Option A is incorrect because hemoglobinuria occurs with hemolysis, not
crush injury. Option B is incorrect because while hypovolemia may contribute, the
primary mechanism in crush syndrome is myoglobin-induced intrarenal damage. Option
D is incorrect because postrenal obstruction from urethral trauma would not explain the
hyperkalemia and uric acid elevation characteristic of rhabdomyolysis.
Question 5
A 62-year-old male with hepatitis C cirrhosis develops hepatocellular carcinoma. Which
sequence of molecular events best explains the progression from chronic inflammation
to malignancy in this patient?
A. Chronic inflammation induces cellular atrophy, followed by compensatory
hyperplasia and oncogene activation
B. Persistent inflammation generates reactive oxygen species causing DNA damage,
activating proto-oncogenes and inactivating tumor suppressor genes
C. Viral hepatitis directly transforms hepatocytes through insertion of viral DNA into
oncogenes
D. Cirrhosis causes ischemic necrosis leading to fibroblast metaplasia and subsequent
carcinogenesis
Correct Answer: B
Rationale: Chronic hepatitis C produces persistent inflammation with macrophage and
neutrophil generation of reactive oxygen and nitrogen species; these free radicals cause
Nursing Question Bank (Latest 2026/2027 Edition) – 100% Correct
Questions, Answers & Detailed Rationales
Total Questions: 75
Time Allowed: 150 Minutes
Select the BEST answer for each question.
SECTION 1: CELLULAR ADAPTATION, INJURY, & NEOPLASIA
Questions 1–9
Question 1
A 68-year-old male with a 40 pack-year smoking history presents with a chronic cough
and hemoptysis. Biopsy of a lung mass reveals squamous cell carcinoma. Which
pathophysiological mechanism best explains the cellular transformation from normal
bronchial epithelium to squamous metaplasia and subsequent dysplasia in this patient?
A. Chronic hypoxia induces cellular hypertrophy followed by hyperplasia
B. Repeated chemical injury causes adaptive metaplasia that progresses through
dysplasia to neoplasia via accumulated genetic mutations
C. Viral infection triggers immediate apoptosis of ciliated cells with subsequent
regeneration
D. Autoimmune destruction of type II pneumocytes leads to compensatory squamous
hyperplasia
Correct Answer: B
,Rationale: Chronic tobacco exposure causes repeated chemical injury to bronchial
epithelium; the normal ciliated pseudostratified columnar epithelium undergoes
protective squamous metaplasia, which with continued carcinogen exposure
accumulates genetic mutations progressing through dysplasia to invasive carcinoma.
Option A is incorrect because hypoxia does not drive this specific metaplastic
sequence. Option C is incorrect because viral infection is not the primary mechanism in
this smoking-related context, and apoptosis would not produce this progressive
transformation. Option D is incorrect because autoimmune mechanisms do not explain
smoking-related squamous cell carcinoma pathogenesis.
Question 2
A 45-year-old female undergoes bilateral mastectomy for breast cancer prevention after
testing positive for BRCA1 mutation. Which pathophysiological concept best explains
why BRCA1 mutation carriers have significantly increased breast cancer risk?
A. BRCA1 is a proto-oncogene that promotes uncontrolled cellular proliferation when
mutated
B. BRCA1 functions as a tumor suppressor gene involved in DNA double-strand break
repair; loss of function permits genomic instability
C. BRCA1 mutation activates telomerase, preventing cellular senescence and enabling
immortalization
D. BRCA1 normally inhibits apoptosis; mutation allows damaged cells to survive and
proliferate
Correct Answer: B
Rationale: BRCA1 is a tumor suppressor gene encoding a protein essential for
homologous recombination repair of DNA double-strand breaks; loss-of-function
mutations permit accumulation of genetic errors and chromosomal instability, driving
carcinogenesis. Option A is incorrect because BRCA1 is not a proto-oncogene. Option C
is incorrect because BRCA1 does not regulate telomerase activity. Option D is incorrect
,because BRCA1 does not primarily function as an apoptosis inhibitor; its core role is
DNA repair fidelity maintenance.
Question 3
A 55-year-old male with chronic hypertension presents with left ventricular hypertrophy
on echocardiography. Which cellular adaptation best describes the increase in
myocardial cell size observed in this patient?
A. Hyperplasia of cardiac myocytes in response to increased afterload
B. Hypertrophy of existing cardiac myocytes due to increased mechanical workload
C. Metaplasia of fibroblasts into cardiac muscle cells
D. Dysplasia of ventricular myocytes with nuclear atypia
Correct Answer: B
Rationale: Cardiac myocytes are terminally differentiated cells incapable of hyperplasia;
chronic pressure overload from hypertension induces hypertrophy of existing myocytes
through increased protein synthesis and sarcomere addition, increasing cell size
without increasing cell number. Option A is incorrect because adult cardiac myocytes
do not undergo hyperplasia. Option C is incorrect because metaplasia does not occur
between fibroblasts and muscle cells. Option D is incorrect because dysplasia implies
premalignant disordered growth, not the compensatory adaptive response to
hemodynamic stress.
Question 4
A 28-year-old trauma patient develops crush injuries to both lower extremities.
Laboratory studies reveal markedly elevated serum potassium, creatinine, and uric acid.
Which pathophysiological mechanism underlies the acute kidney injury in this patient?
A. Direct nephrotoxicity from hemoglobin pigment causing tubular obstruction
B. Prerenal azotemia from hypovolemic shock reducing renal perfusion
, C. Myoglobin release from damaged muscle causing intrarenal tubular obstruction and
direct cytotoxicity
D. Postrenal obstruction from urethral trauma secondary to pelvic fracture
Correct Answer: C
Rationale: Crush injury causes rhabdomyolysis with massive myoglobin release;
myoglobin precipitates in renal tubules causing obstruction, while its heme moiety
generates free radicals causing direct tubular epithelial cytotoxicity, producing acute
kidney injury. Option A is incorrect because hemoglobinuria occurs with hemolysis, not
crush injury. Option B is incorrect because while hypovolemia may contribute, the
primary mechanism in crush syndrome is myoglobin-induced intrarenal damage. Option
D is incorrect because postrenal obstruction from urethral trauma would not explain the
hyperkalemia and uric acid elevation characteristic of rhabdomyolysis.
Question 5
A 62-year-old male with hepatitis C cirrhosis develops hepatocellular carcinoma. Which
sequence of molecular events best explains the progression from chronic inflammation
to malignancy in this patient?
A. Chronic inflammation induces cellular atrophy, followed by compensatory
hyperplasia and oncogene activation
B. Persistent inflammation generates reactive oxygen species causing DNA damage,
activating proto-oncogenes and inactivating tumor suppressor genes
C. Viral hepatitis directly transforms hepatocytes through insertion of viral DNA into
oncogenes
D. Cirrhosis causes ischemic necrosis leading to fibroblast metaplasia and subsequent
carcinogenesis
Correct Answer: B
Rationale: Chronic hepatitis C produces persistent inflammation with macrophage and
neutrophil generation of reactive oxygen and nitrogen species; these free radicals cause
