NR 507 MIDTERM REVIEW EXAM 2026/2027 | Advanced
Pathophysiology | Chamberlain University | Pass Guaranteed
- A+ Graded
Section 1: Cellular Biology, Adaptation, & Injury
Q1: A 68-year-old male with chronic hypertension presents with left ventricular wall
thickening on echocardiogram. The nurse practitioner recognizes this cellular
adaptation as which of the following?
A. Hyperplasia resulting from increased cell division
B. Hypertrophy due to increased workload and protein synthesis [CORRECT]
C. Metaplasia from chronic pressure changes
D. Dysplasia indicating pre-malignant transformation
Correct Answer: B
Rationale: Hypertrophy is an increase in cell size resulting from increased protein
synthesis in response to mechanical stress or hormonal stimulation. In hypertension,
the left ventricle must pump against elevated afterload, causing individual cardiac
myocytes to enlarge. Hyperplasia involves increased cell number (not typical in cardiac
muscle), metaplasia is a reversible change from one differentiated cell type to another,
and dysplasia represents disordered, pre-neoplastic cellular development. Clinical
relevance: Understanding hypertrophy helps clinicians recognize compensatory
mechanisms in heart disease and intervene before decompensation occurs.
Q2: A patient experiencing acute myocardial infarction develops coagulative necrosis of
the myocardium. Which pathophysiological mechanism best explains this type of tissue
death?
A. Enzymatic liquefaction by neutrophil-derived proteases
B. Preservation of tissue architecture with denatured proteins and loss of nuclei
[CORRECT]
C. Caseous granulomatous destruction with amorphous debris
D. Fatty acid saponification and calcium deposition
,Correct Answer: B
Rationale: Coagulative necrosis results from ischemia that denatures intracellular
proteins and enzymes, preserving the tissue architecture for several days while nuclei
disappear (karyolysis, pyknosis, karyorrhexis). Liquefactive necrosis occurs in brain
infarcts and abscesses due to enzymatic digestion. Caseous necrosis is characteristic
of tuberculosis. Fat necrosis involves saponification in pancreatic or breast tissue.
Clinical relevance: Recognizing coagulative necrosis guides the timing of cardiac
biomarker interpretation and reperfusion therapy decisions.
Q3: During reperfusion therapy for acute ischemic stroke, a patient develops worsening
neurological deficits. Which mechanism is primarily responsible for this reperfusion
injury?
A. Decreased oxygen delivery causing sustained hypoxia
B. Generation of reactive oxygen species and calcium overload leading to cellular
membrane damage [CORRECT]
C. Persistent vasoconstriction preventing blood flow restoration
D. Activation of anti-inflammatory cytokines only
Correct Answer: B
Rationale: Reperfusion injury occurs when oxygen is reintroduced to ischemic tissue,
generating reactive oxygen species (ROS) through the xanthine oxidase pathway and
causing calcium overload via Na+/Ca2+ exchanger dysfunction. ROS damage cell
membranes, proteins, and DNA. While vasoconstriction may occur, the primary injury
mechanism is oxidative stress. Anti-inflammatory cytokines are protective, not injurious.
Clinical relevance: Clinicians must balance the benefits of reperfusion against the risks
of reperfusion injury, monitoring patients closely during thrombolytic or interventional
procedures.
Q4: A patient with chronic alcohol abuse develops hepatic steatosis. Which cellular
accumulation is responsible for the fatty changes observed in hepatocytes?
A. Glycogen accumulation due to insulin resistance
B. Triglyceride accumulation from impaired lipoprotein export and beta-oxidation
[CORRECT]
C. Protein accumulation from defective hepatocyte synthesis
,D. Iron accumulation from chronic hemolysis
Correct Answer: B
Rationale: Hepatic steatosis (fatty liver) results from triglyceride accumulation within
hepatocytes. Alcohol metabolism generates NADH, which promotes fatty acid synthesis
while inhibiting beta-oxidation. Additionally, alcohol impairs lipoprotein assembly and
export. Glycogen accumulation occurs in glycogen storage diseases, protein
accumulation in alpha-1 antitrypsin deficiency, and iron accumulation in
hemochromatosis. Clinical relevance: Recognizing steatosis pathophysiology helps
nurse practitioners counsel patients on alcohol cessation and monitor for progression
to steatohepatitis and cirrhosis.
Q5: A 45-year-old smoker undergoes bronchoscopy revealing pseudostratified ciliated
columnar epithelium replaced by stratified squamous epithelium in the bronchi. This
cellular adaptation is best described as:
A. Dysplasia with disordered maturation and nuclear atypia
B. Metaplasia, a reversible change in response to chronic irritation [CORRECT]
C. Hyperplasia from increased epithelial cell proliferation
D. Anaplasia indicating complete loss of differentiation
Correct Answer: B
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by
another, often in response to chronic irritation. In smokers, chronic irritation causes
ciliated columnar epithelium to transform to more resilient stratified squamous
epithelium. While metaplasia is reversible if the irritant is removed, it can progress to
dysplasia and carcinoma. Dysplasia involves disordered growth with nuclear atypia,
hyperplasia is increased cell number, and anaplasia represents complete loss of
differentiation (malignancy). Clinical relevance: Identifying metaplasia prompts smoking
cessation counseling and surveillance for malignant transformation in high-risk
patients.
Q6: A patient presents with dry gangrene of the toe secondary to peripheral arterial
disease. Which pathophysiological process distinguishes dry gangrene from wet
gangrene?
, A. Rapid bacterial invasion causing liquefactive necrosis
B. Coagulative necrosis with tissue desiccation and minimal bacterial infection
[CORRECT]
C. Arterial occlusion with venous congestion and edema
D. Neutrophilic infiltration and enzymatic tissue digestion
Correct Answer: B
Rationale: Dry gangrene results from coagulative necrosis due to arterial insufficiency
without venous obstruction, leading to tissue desiccation and mummification with
minimal bacterial involvement. Wet gangrene involves bacterial infection (often
Clostridium species), liquefactive necrosis, and tissue liquefaction. Venous congestion
characterizes wet gangrene, while neutrophilic infiltration is prominent in wet gangrene
and abscess formation. Clinical relevance: Distinguishing dry from wet gangrene
determines urgency of surgical intervention and antibiotic therapy; dry gangrene may
allow time for revascularization, while wet gangrene requires emergent debridement.
Q7: In a patient with severe cellular injury, which morphological feature indicates
irreversible damage and impending cell death?
A. Cellular swelling and loss of microvilli
B. Nuclear pyknosis, karyorrhexis, or karyolysis [CORRECT]
C. Decreased eosinophilia on histological staining
D. Mitochondrial swelling with dissociation of ribosomes
Correct Answer: B
Rationale: Nuclear changes—pyknosis (nuclear shrinkage and increased basophilia),
karyorrhexis (nuclear fragmentation), and karyolysis (nuclear dissolution)—are
hallmarks of irreversible cell injury and necrosis. Cellular swelling, mitochondrial
swelling, and ribosome dissociation are reversible changes. Decreased eosinophilia is
not characteristic; necrotic cells often show increased eosinophilia due to denatured
proteins and loss of RNA. Clinical relevance: Recognizing irreversible injury markers
helps clinicians determine tissue viability and guide decisions regarding debridement,
revascularization, or amputation.
Q8: A patient with type 2 diabetes demonstrates glycogen accumulation in renal tubular
epithelial cells. This intracellular accumulation is classified as:
Pathophysiology | Chamberlain University | Pass Guaranteed
- A+ Graded
Section 1: Cellular Biology, Adaptation, & Injury
Q1: A 68-year-old male with chronic hypertension presents with left ventricular wall
thickening on echocardiogram. The nurse practitioner recognizes this cellular
adaptation as which of the following?
A. Hyperplasia resulting from increased cell division
B. Hypertrophy due to increased workload and protein synthesis [CORRECT]
C. Metaplasia from chronic pressure changes
D. Dysplasia indicating pre-malignant transformation
Correct Answer: B
Rationale: Hypertrophy is an increase in cell size resulting from increased protein
synthesis in response to mechanical stress or hormonal stimulation. In hypertension,
the left ventricle must pump against elevated afterload, causing individual cardiac
myocytes to enlarge. Hyperplasia involves increased cell number (not typical in cardiac
muscle), metaplasia is a reversible change from one differentiated cell type to another,
and dysplasia represents disordered, pre-neoplastic cellular development. Clinical
relevance: Understanding hypertrophy helps clinicians recognize compensatory
mechanisms in heart disease and intervene before decompensation occurs.
Q2: A patient experiencing acute myocardial infarction develops coagulative necrosis of
the myocardium. Which pathophysiological mechanism best explains this type of tissue
death?
A. Enzymatic liquefaction by neutrophil-derived proteases
B. Preservation of tissue architecture with denatured proteins and loss of nuclei
[CORRECT]
C. Caseous granulomatous destruction with amorphous debris
D. Fatty acid saponification and calcium deposition
,Correct Answer: B
Rationale: Coagulative necrosis results from ischemia that denatures intracellular
proteins and enzymes, preserving the tissue architecture for several days while nuclei
disappear (karyolysis, pyknosis, karyorrhexis). Liquefactive necrosis occurs in brain
infarcts and abscesses due to enzymatic digestion. Caseous necrosis is characteristic
of tuberculosis. Fat necrosis involves saponification in pancreatic or breast tissue.
Clinical relevance: Recognizing coagulative necrosis guides the timing of cardiac
biomarker interpretation and reperfusion therapy decisions.
Q3: During reperfusion therapy for acute ischemic stroke, a patient develops worsening
neurological deficits. Which mechanism is primarily responsible for this reperfusion
injury?
A. Decreased oxygen delivery causing sustained hypoxia
B. Generation of reactive oxygen species and calcium overload leading to cellular
membrane damage [CORRECT]
C. Persistent vasoconstriction preventing blood flow restoration
D. Activation of anti-inflammatory cytokines only
Correct Answer: B
Rationale: Reperfusion injury occurs when oxygen is reintroduced to ischemic tissue,
generating reactive oxygen species (ROS) through the xanthine oxidase pathway and
causing calcium overload via Na+/Ca2+ exchanger dysfunction. ROS damage cell
membranes, proteins, and DNA. While vasoconstriction may occur, the primary injury
mechanism is oxidative stress. Anti-inflammatory cytokines are protective, not injurious.
Clinical relevance: Clinicians must balance the benefits of reperfusion against the risks
of reperfusion injury, monitoring patients closely during thrombolytic or interventional
procedures.
Q4: A patient with chronic alcohol abuse develops hepatic steatosis. Which cellular
accumulation is responsible for the fatty changes observed in hepatocytes?
A. Glycogen accumulation due to insulin resistance
B. Triglyceride accumulation from impaired lipoprotein export and beta-oxidation
[CORRECT]
C. Protein accumulation from defective hepatocyte synthesis
,D. Iron accumulation from chronic hemolysis
Correct Answer: B
Rationale: Hepatic steatosis (fatty liver) results from triglyceride accumulation within
hepatocytes. Alcohol metabolism generates NADH, which promotes fatty acid synthesis
while inhibiting beta-oxidation. Additionally, alcohol impairs lipoprotein assembly and
export. Glycogen accumulation occurs in glycogen storage diseases, protein
accumulation in alpha-1 antitrypsin deficiency, and iron accumulation in
hemochromatosis. Clinical relevance: Recognizing steatosis pathophysiology helps
nurse practitioners counsel patients on alcohol cessation and monitor for progression
to steatohepatitis and cirrhosis.
Q5: A 45-year-old smoker undergoes bronchoscopy revealing pseudostratified ciliated
columnar epithelium replaced by stratified squamous epithelium in the bronchi. This
cellular adaptation is best described as:
A. Dysplasia with disordered maturation and nuclear atypia
B. Metaplasia, a reversible change in response to chronic irritation [CORRECT]
C. Hyperplasia from increased epithelial cell proliferation
D. Anaplasia indicating complete loss of differentiation
Correct Answer: B
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by
another, often in response to chronic irritation. In smokers, chronic irritation causes
ciliated columnar epithelium to transform to more resilient stratified squamous
epithelium. While metaplasia is reversible if the irritant is removed, it can progress to
dysplasia and carcinoma. Dysplasia involves disordered growth with nuclear atypia,
hyperplasia is increased cell number, and anaplasia represents complete loss of
differentiation (malignancy). Clinical relevance: Identifying metaplasia prompts smoking
cessation counseling and surveillance for malignant transformation in high-risk
patients.
Q6: A patient presents with dry gangrene of the toe secondary to peripheral arterial
disease. Which pathophysiological process distinguishes dry gangrene from wet
gangrene?
, A. Rapid bacterial invasion causing liquefactive necrosis
B. Coagulative necrosis with tissue desiccation and minimal bacterial infection
[CORRECT]
C. Arterial occlusion with venous congestion and edema
D. Neutrophilic infiltration and enzymatic tissue digestion
Correct Answer: B
Rationale: Dry gangrene results from coagulative necrosis due to arterial insufficiency
without venous obstruction, leading to tissue desiccation and mummification with
minimal bacterial involvement. Wet gangrene involves bacterial infection (often
Clostridium species), liquefactive necrosis, and tissue liquefaction. Venous congestion
characterizes wet gangrene, while neutrophilic infiltration is prominent in wet gangrene
and abscess formation. Clinical relevance: Distinguishing dry from wet gangrene
determines urgency of surgical intervention and antibiotic therapy; dry gangrene may
allow time for revascularization, while wet gangrene requires emergent debridement.
Q7: In a patient with severe cellular injury, which morphological feature indicates
irreversible damage and impending cell death?
A. Cellular swelling and loss of microvilli
B. Nuclear pyknosis, karyorrhexis, or karyolysis [CORRECT]
C. Decreased eosinophilia on histological staining
D. Mitochondrial swelling with dissociation of ribosomes
Correct Answer: B
Rationale: Nuclear changes—pyknosis (nuclear shrinkage and increased basophilia),
karyorrhexis (nuclear fragmentation), and karyolysis (nuclear dissolution)—are
hallmarks of irreversible cell injury and necrosis. Cellular swelling, mitochondrial
swelling, and ribosome dissociation are reversible changes. Decreased eosinophilia is
not characteristic; necrotic cells often show increased eosinophilia due to denatured
proteins and loss of RNA. Clinical relevance: Recognizing irreversible injury markers
helps clinicians determine tissue viability and guide decisions regarding debridement,
revascularization, or amputation.
Q8: A patient with type 2 diabetes demonstrates glycogen accumulation in renal tubular
epithelial cells. This intracellular accumulation is classified as:
