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NURS 6501 ADVANCED PATHOPHYSIOLOGY QUIZ
COLLECTION 2026/2027 | 150 Questions 100%
Correct Answers | Walden University MSN/NP | Pass
Guaranteed - A+ Graded
[QUIZ 1: Cellular & Genetic Foundations (Q1-20)]
Q1. A 68-year-old male with prostate cancer undergoes androgen deprivation
therapy. Histologic examination of his skeletal muscle shows decreased cell size with
preserved nuclear morphology. Which cellular adaptation best explains this finding?
A. Hypertrophy B. Hyperplasia C. Atrophy D. Metaplasia
C. Atrophy [CORRECT]
Rationale: Atrophy is a decrease in cell size caused by reduced workload, hormonal
stimulation, or nutrient deprivation; androgen deprivation reduces muscle
stimulation. Hypertrophy involves increased cell size, hyperplasia involves increased
cell number, and metaplasia involves reversible replacement of one differentiated cell
type with another.
Correct Answer: C
Q2. A 45-year-old weightlifter demonstrates significant increases in skeletal muscle
cross-sectional area after 6 months of resistance training. This adaptive response is
characterized primarily by:
A. Increased number of muscle fibers B. Increased size of individual muscle fibers C.
Replacement of muscle fibers by adipose tissue D. Irreversible accumulation of
contractile proteins
B. Increased size of individual muscle fibers [CORRECT]
Rationale: Physiologic muscle hypertrophy results from increased workload causing
enlargement of individual muscle fibers through synthesis of additional contractile
proteins; skeletal muscle hyperplasia is minimal in humans. Adipose replacement
describes fatty infiltration, and hypertrophy is reversible with disuse.
Correct Answer: B
,2
Q3. A 35-year-old female with multiple miscarriages is found to have endometrial
hyperplasia on biopsy. The pathologist notes an increased number of endometrial
glands relative to stroma. This change represents:
A. Hypertrophy of glandular cells B. Hyperplasia driven by unopposed estrogen
stimulation C. Metaplasia of stromal cells to glandular epithelium D. Dysplasia with
loss of nuclear polarity
B. Hyperplasia driven by unopposed estrogen stimulation [CORRECT]
Rationale: Endometrial hyperplasia is an increase in the number of glandular cells
(hyperplasia), classically driven by unopposed estrogen; it is distinct from
hypertrophy (increased cell size), metaplasia (cell type change), and dysplasia
(disordered growth with nuclear atypia).
Correct Answer: B
Q4. Chronic tobacco smoking causes respiratory epithelium to transform from
ciliated pseudostratified columnar to stratified squamous epithelium. This protective
adaptation is termed:
A. Dysplasia B. Hyperplasia C. Metaplasia D. Anaplasia
C. Metaplasia [CORRECT]
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by
another better suited to withstand an environmental stress; smoking-induced
squamous metaplasia is a classic example. Dysplasia implies disordered pre-
neoplastic growth, and anaplasia indicates loss of differentiation in malignancy.
Correct Answer: C
Q5. A 55-year-old male with Barrett esophagus undergoes endoscopic biopsy
showing columnar epithelium with nuclear hyperchromasia, pleomorphism, and loss
of polarity extending to the mucosal surface. These findings are most consistent with:
A. Reversible squamous metaplasia B. Low-grade dysplasia C. High-grade dysplasia
D. Invasive adenocarcinoma
C. High-grade dysplasia [CORRECT]
Rationale: High-grade dysplasia demonstrates severe cytologic atypia with loss of
polarity involving the full epithelial thickness without basement membrane breach;
,3
this is the immediate precursor to invasive adenocarcinoma in Barrett esophagus.
Invasive carcinoma requires stromal invasion.
Correct Answer: C
Q6. During acute myocardial infarction, cardiac myocytes undergo cell death
primarily due to:
A. Activation of death receptor-mediated apoptosis B. ATP depletion and loss of
ionic homeostasis C. Programmed autophagic cell death D. Viral-induced cytopathic
effects
B. ATP depletion and loss of ionic homeostasis [CORRECT]
Rationale: Ischemic hypoxic cell injury causes mitochondrial dysfunction, ATP
depletion, Na+/K+-ATPase failure, cellular swelling, and calcium influx, leading to
necrosis; apoptosis may occur at the infarct border zone but coagulative necrosis
dominates in acute MI.
Correct Answer: B
Q7. Reperfusion of ischemic tissue paradoxically exacerbates cellular injury through
generation of:
A. Lysosomal enzymes B. Reactive oxygen species C. Prostaglandins D. Complement
proteins
B. Reactive oxygen species [CORRECT]
Rationale: Ischemia-reperfusion injury generates reactive oxygen species (superoxide,
hydroxyl radicals, hydrogen peroxide) via mitochondrial electron transport chain
dysfunction and xanthine oxidase activation, causing lipid peroxidation and DNA
damage. Lysosomal enzymes contribute to autodigestion but are not the primary
reperfusion-specific mechanism.
Correct Answer: B
Q8. Carbon tetrachloride (CCl4) toxicity causes hepatocyte necrosis primarily through
which mechanism?
A. Direct binding to DNA causing strand breaks B. Free radical formation via
cytochrome P450 metabolism C. Inhibition of protein synthesis by ribosomal
inactivation D. Mitochondrial DNA depletion
, 4
B. Free radical formation via cytochrome P450 metabolism [CORRECT]
Rationale: CCl4 is metabolized by hepatic cytochrome P450 (CYP2E1) to the
trichloromethyl radical (CCl3•), which initiates lipid peroxidation of hepatocyte
membranes, causing centrilobular necrosis. This exemplifies chemical injury via free
radical generation.
Correct Answer: B
Q9. Viral hepatitis causes hepatocyte injury primarily through:
A. Direct cytopathic effect of viral replication overwhelming cellular machinery B.
Immunologic-mediated cytotoxic T-lymphocyte attack against viral antigens C.
Toxin-mediated inhibition of hepatocyte protein synthesis D. Ischemic hypoxia from
viral-induced vasculitis
B. Immunologic-mediated cytotoxic T-lymphocyte attack against viral antigens
[CORRECT]
Rationale: In viral hepatitis (particularly HBV and HCV), hepatocyte injury is primarily
immune-mediated via CD8+ cytotoxic T-lymphocytes recognizing viral antigens on
hepatocyte surfaces; direct viral cytopathic effects are minimal compared to the
immunologic response.
Correct Answer: B
Q10. A 25-year-old female with systemic lupus erythematosus develops
glomerulonephritis due to immune complex deposition. The mechanism of renal cell
injury is classified as:
A. Hypoxic injury B. Infectious injury C. Immunologic injury D. Genetic injury
C. Immunologic injury [CORRECT]
Rationale: SLE glomerulonephritis results from immunologic injury via deposition of
circulating antigen-antibody complexes (type III hypersensitivity) activating
complement and recruiting inflammatory cells. This exemplifies immunologic cell
injury distinct from hypoxic, infectious, or genetic mechanisms.
Correct Answer: C
Q11. Intrinsic (mitochondrial) apoptosis is characterized by:
NURS 6501 ADVANCED PATHOPHYSIOLOGY QUIZ
COLLECTION 2026/2027 | 150 Questions 100%
Correct Answers | Walden University MSN/NP | Pass
Guaranteed - A+ Graded
[QUIZ 1: Cellular & Genetic Foundations (Q1-20)]
Q1. A 68-year-old male with prostate cancer undergoes androgen deprivation
therapy. Histologic examination of his skeletal muscle shows decreased cell size with
preserved nuclear morphology. Which cellular adaptation best explains this finding?
A. Hypertrophy B. Hyperplasia C. Atrophy D. Metaplasia
C. Atrophy [CORRECT]
Rationale: Atrophy is a decrease in cell size caused by reduced workload, hormonal
stimulation, or nutrient deprivation; androgen deprivation reduces muscle
stimulation. Hypertrophy involves increased cell size, hyperplasia involves increased
cell number, and metaplasia involves reversible replacement of one differentiated cell
type with another.
Correct Answer: C
Q2. A 45-year-old weightlifter demonstrates significant increases in skeletal muscle
cross-sectional area after 6 months of resistance training. This adaptive response is
characterized primarily by:
A. Increased number of muscle fibers B. Increased size of individual muscle fibers C.
Replacement of muscle fibers by adipose tissue D. Irreversible accumulation of
contractile proteins
B. Increased size of individual muscle fibers [CORRECT]
Rationale: Physiologic muscle hypertrophy results from increased workload causing
enlargement of individual muscle fibers through synthesis of additional contractile
proteins; skeletal muscle hyperplasia is minimal in humans. Adipose replacement
describes fatty infiltration, and hypertrophy is reversible with disuse.
Correct Answer: B
,2
Q3. A 35-year-old female with multiple miscarriages is found to have endometrial
hyperplasia on biopsy. The pathologist notes an increased number of endometrial
glands relative to stroma. This change represents:
A. Hypertrophy of glandular cells B. Hyperplasia driven by unopposed estrogen
stimulation C. Metaplasia of stromal cells to glandular epithelium D. Dysplasia with
loss of nuclear polarity
B. Hyperplasia driven by unopposed estrogen stimulation [CORRECT]
Rationale: Endometrial hyperplasia is an increase in the number of glandular cells
(hyperplasia), classically driven by unopposed estrogen; it is distinct from
hypertrophy (increased cell size), metaplasia (cell type change), and dysplasia
(disordered growth with nuclear atypia).
Correct Answer: B
Q4. Chronic tobacco smoking causes respiratory epithelium to transform from
ciliated pseudostratified columnar to stratified squamous epithelium. This protective
adaptation is termed:
A. Dysplasia B. Hyperplasia C. Metaplasia D. Anaplasia
C. Metaplasia [CORRECT]
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by
another better suited to withstand an environmental stress; smoking-induced
squamous metaplasia is a classic example. Dysplasia implies disordered pre-
neoplastic growth, and anaplasia indicates loss of differentiation in malignancy.
Correct Answer: C
Q5. A 55-year-old male with Barrett esophagus undergoes endoscopic biopsy
showing columnar epithelium with nuclear hyperchromasia, pleomorphism, and loss
of polarity extending to the mucosal surface. These findings are most consistent with:
A. Reversible squamous metaplasia B. Low-grade dysplasia C. High-grade dysplasia
D. Invasive adenocarcinoma
C. High-grade dysplasia [CORRECT]
Rationale: High-grade dysplasia demonstrates severe cytologic atypia with loss of
polarity involving the full epithelial thickness without basement membrane breach;
,3
this is the immediate precursor to invasive adenocarcinoma in Barrett esophagus.
Invasive carcinoma requires stromal invasion.
Correct Answer: C
Q6. During acute myocardial infarction, cardiac myocytes undergo cell death
primarily due to:
A. Activation of death receptor-mediated apoptosis B. ATP depletion and loss of
ionic homeostasis C. Programmed autophagic cell death D. Viral-induced cytopathic
effects
B. ATP depletion and loss of ionic homeostasis [CORRECT]
Rationale: Ischemic hypoxic cell injury causes mitochondrial dysfunction, ATP
depletion, Na+/K+-ATPase failure, cellular swelling, and calcium influx, leading to
necrosis; apoptosis may occur at the infarct border zone but coagulative necrosis
dominates in acute MI.
Correct Answer: B
Q7. Reperfusion of ischemic tissue paradoxically exacerbates cellular injury through
generation of:
A. Lysosomal enzymes B. Reactive oxygen species C. Prostaglandins D. Complement
proteins
B. Reactive oxygen species [CORRECT]
Rationale: Ischemia-reperfusion injury generates reactive oxygen species (superoxide,
hydroxyl radicals, hydrogen peroxide) via mitochondrial electron transport chain
dysfunction and xanthine oxidase activation, causing lipid peroxidation and DNA
damage. Lysosomal enzymes contribute to autodigestion but are not the primary
reperfusion-specific mechanism.
Correct Answer: B
Q8. Carbon tetrachloride (CCl4) toxicity causes hepatocyte necrosis primarily through
which mechanism?
A. Direct binding to DNA causing strand breaks B. Free radical formation via
cytochrome P450 metabolism C. Inhibition of protein synthesis by ribosomal
inactivation D. Mitochondrial DNA depletion
, 4
B. Free radical formation via cytochrome P450 metabolism [CORRECT]
Rationale: CCl4 is metabolized by hepatic cytochrome P450 (CYP2E1) to the
trichloromethyl radical (CCl3•), which initiates lipid peroxidation of hepatocyte
membranes, causing centrilobular necrosis. This exemplifies chemical injury via free
radical generation.
Correct Answer: B
Q9. Viral hepatitis causes hepatocyte injury primarily through:
A. Direct cytopathic effect of viral replication overwhelming cellular machinery B.
Immunologic-mediated cytotoxic T-lymphocyte attack against viral antigens C.
Toxin-mediated inhibition of hepatocyte protein synthesis D. Ischemic hypoxia from
viral-induced vasculitis
B. Immunologic-mediated cytotoxic T-lymphocyte attack against viral antigens
[CORRECT]
Rationale: In viral hepatitis (particularly HBV and HCV), hepatocyte injury is primarily
immune-mediated via CD8+ cytotoxic T-lymphocytes recognizing viral antigens on
hepatocyte surfaces; direct viral cytopathic effects are minimal compared to the
immunologic response.
Correct Answer: B
Q10. A 25-year-old female with systemic lupus erythematosus develops
glomerulonephritis due to immune complex deposition. The mechanism of renal cell
injury is classified as:
A. Hypoxic injury B. Infectious injury C. Immunologic injury D. Genetic injury
C. Immunologic injury [CORRECT]
Rationale: SLE glomerulonephritis results from immunologic injury via deposition of
circulating antigen-antibody complexes (type III hypersensitivity) activating
complement and recruiting inflammatory cells. This exemplifies immunologic cell
injury distinct from hypoxic, infectious, or genetic mechanisms.
Correct Answer: C
Q11. Intrinsic (mitochondrial) apoptosis is characterized by:
