PORTAGE LEARNING | NURS 231 PATHOPHYSIOLOGY ALL EXAMS {LATEST UPDATE}
PORTAGE LEARNING
NURS 231 PATHOPHYSIOLOGY
ALL EXAMS {LATEST UPDATE}
Comprehensive Examination Collection
Aligned with Portage Learning NURS 231 Course Syllabus, NCLEX-RN Pathophysiology Standards, and
Pathophysiology Competencies (2026/2027 Edition)
Total Questions 150 Cognitive Mix 20% Recall / 50% Application / 30% Analysis
Sections 12 Question Style 75% Scenario-based / 25% Direct Knowledge
Format MCQ (4 options, 1Special
correct)Items 20 Clinical Reasoning / 15 Lab Values / 15 Mechanisms
Instructions: Select the single best answer for each question. Rationales follow every item and reference NURS 231
curriculum content, NCLEX-RN standards, and core pathophysiology principles.
Section 1: Cellular Injury, Adaptation, & Death
Questions: 15 | Focus: Cellular adaptation, reversible vs. irreversible injury, necrosis types, apoptosis, free radicals,
oxidative stress, cellular aging
Q1: A 68-year-old male with longstanding essential hypertension has an echocardiogram demonstrating increased
left ventricular wall thickness without an increase in chamber size. Which cellular adaptation best explains this
finding?
A. Atrophy due to decreased workload
B. Hypertrophy due to increased workload *[CORRECT]*
C. Hyperplasia due to hormonal stimulation
D. Metaplasia due to chronic irritation
Correct Answer: B
Rationale: Pressure-overload hypertrophy is the dominant adaptation in systemic hypertension; cardiac myocytes, which are
terminally differentiated and cannot divide, increase in cell size (hypertrophy) to generate higher systolic pressures. Atrophy
would reduce wall thickness, hyperplasia requires cell division (not possible in myocytes), and metaplasia is a reversible
substitution of one adult cell type for another (e.g., Barrett esophagus), not a response to pressure overload. NURS 231
emphasizes that hypertrophy and hyperplasia may coexist in hormonally responsive tissue, but in myocardium only hypertrophy
occurs.
Q2: A 55-year-old female with chronic gastroesophageal reflux disease undergoes endoscopy. Biopsy of the distal
esophagus shows columnar epithelium replacing the normal squamous epithelium. Which adaptation is described,
and what is its clinical significance?
A. Hypertrophy; benign response with no malignant potential
B. Hyperplasia; benign increase in cell number
C. Metaplasia; premalignant lesion with risk of adenocarcinoma *[CORRECT]*
D. Dysplasia; already malignant and requires immediate resection
Comprehensive Examination Collection - 150 Questions Page 1
,PORTAGE LEARNING | NURS 231 PATHOPHYSIOLOGY ALL EXAMS {LATEST UPDATE}
Correct Answer: C
Rationale: Barrett esophagus is the classic example of intestinal metaplasia - a reversible substitution of squamous epithelium
with columnar (goblet-cell-containing) epithelium better suited to resist acidic reflux. While the change itself is adaptive, it
carries a 30- to 125-fold increased risk of esophageal adenocarcinoma through progression to dysplasia. Hypertrophy and
hyperplasia increase cell size/number without changing cell type. Dysplasia denotes disordered growth and is not yet invasive
carcinoma but is a later, more ominous step than metaplasia.
Q3: A researcher examines a tissue specimen under electron microscopy after 20 minutes of complete ischemia.
Which finding most reliably distinguishes reversible from irreversible cellular injury?
A. Swelling of the endoplasmic reticulum and loss of ribosomes
B. Severe mitochondrial vacuolization and rupture of the outer membrane *[CORRECT]*
C. Cloudy swelling of the cell with redistribution of fluid
D. Decreased glycogen content and lipid accumulation
Correct Answer: B
Rationale: The transition to irreversible injury is marked structurally by severe mitochondrial damage (vacuolization, amorphous
densities, membrane rupture) and by lysosomal rupture releasing hydrolases. ER swelling, cloudy swelling, glycogen depletion,
and fatty change are features of reversible injury that resolve if perfusion is restored. Membrane integrity - especially of
mitochondria and lysosomes - is the critical threshold; once crossed, cell death is inevitable even with reperfusion.
Q4: A 45-year-old male sustains complete occlusion of the left anterior descending coronary artery. Autopsy 48
hours later shows a firm, pale, wedge-shaped lesion with preservation of cellular outlines. Which pattern of necrosis
is present?
A. Liquefactive necrosis
B. Caseous necrosis
C. Coagulative necrosis *[CORRECT]*
D. Fat necrosis
Correct Answer: C
Rationale: Coagulative necrosis is the hallmark of ischemic injury in all solid tissues except the brain. Protein denaturation
preserves cellular architecture ("tombstone" appearance) for days, producing the firm, pale infarct described. Liquefactive
necrosis occurs in the CNS (ischemic) and in bacterial abscesses where neutrophil enzymes digest tissue into liquid. Caseous
necrosis (TB, fungal) is a cheese-like mix of coagulative and liquefactive. Fat necrosis occurs in pancreatic and breast tissue
following lipase action.
Q5: A 30-year-old patient with pulmonary tuberculosis has a lung lesion demonstrating amorphous, cheese-like
debris surrounded by a granulomatous rim. Which type of necrosis is most characteristic of this lesion?
A. Coagulative necrosis
B. Caseous necrosis *[CORRECT]*
C. Fibrinoid necrosis
D. Gangrenous necrosis
Correct Answer: B
Rationale: Caseous necrosis ("cheese-like") is encountered most often in Mycobacterium tuberculosis infection and certain
fungal infections. It is enclosed by a granulomatous inflammatory response (epithelioid cells, Langhans giant cells) and
represents a distinct variant in which the dead cells lose all structure but retain an amorphous, granular appearance. Fibrinoid
necrosis affects vessel walls in immune-mediated vasculitis; gangrenous necrosis describes ischemic coagulative necrosis of a
limb, often with bacterial infection (wet gangrene).
Comprehensive Examination Collection - 150 Questions Page 2
,PORTAGE LEARNING | NURS 231 PATHOPHYSIOLOGY ALL EXAMS {LATEST UPDATE}
Q6: A 22-year-old female develops acute pancreatitis after alcohol binge. Peripancreatic tissue shows chalky-white
deposits with saponification. Which form of necrosis is occurring?
A. Fat necrosis *[CORRECT]*
B. Liquefactive necrosis
C. Caseous necrosis
D. Fibrinoid necrosis
Correct Answer: A
Rationale: Fat necrosis follows liberation of activated pancreatic lipases into adipose tissue. Lipases split triglycerides into free
fatty acids that combine with calcium to form calcium soaps (saponification), producing the chalky-white deposits seen grossly.
While it can also occur after traumatic fat injury (breast), acute pancreatitis is the classic scenario. Liquefactive necrosis involves
enzymatic digestion to liquid pus; caseous is TB-related; fibrinoid is vascular and immune-mediated.
Q7: A 60-year-old male with a 40-pack-year smoking history has sputum cytology showing pleomorphic bronchial
epithelial cells with hyperchromatic, irregular nuclei and disordered maturation. The cells have not breached the
basement membrane. Which cellular alteration does this represent?
A. Metaplasia
B. Dysplasia *[CORRECT]*
C. Anaplasia
D. Hypertrophy
Correct Answer: B
Rationale: Dysplasia is disordered cellular growth - pleomorphism, hyperchromatic nuclei, abnormal nuclear-to-cytoplasmic
ratio, and loss of polarity - that remains non-invasive (no basement membrane breach). It is a premalignant change often arising
in metaplastic epithelium exposed to carcinogens such as tobacco smoke. Metaplasia is a reversible cell-type substitution without
atypia. Anaplasia describes malignant loss of differentiation (frank cancer). Hypertrophy is increased cell size without atypia.
Q8: A term infant is born with webbed neck, low posterior hairline, and short stature. Genetic testing reveals
monosomy X (45,X). During embryonic development, the loss of oocytes in this patient is mediated primarily by
which process?
A. Coagulative necrosis
B. Apoptosis *[CORRECT]*
C. Autophagy
D. Pyroptosis
Correct Answer: B
Rationale: Apoptosis is programmed cell death, an energy-dependent, gene-regulated process that eliminates damaged, surplus,
or senescent cells without eliciting inflammation. Physiologic apoptosis removes interdigital webbing, shapes organs, and deletes
self-reactive lymphocytes; pathologic apoptosis causes embryonic developmental defects and hormone-dependent involution.
Turner syndrome (45,X) features accelerated ovarian follicular apoptosis, producing streak ovaries and hypergonadotropic
hypogonadism. Necrosis elicits inflammation; autophagy is a survival response to nutrient stress.
Q9: A biomedical researcher exposes cultured hepatocytes to high-dose acetaminophen. The cells deplete
glutathione and accumulate reactive oxygen species. Which mechanism is most directly responsible for
acetaminophen-induced hepatocellular injury?
A. Direct membrane lipid peroxidation by cytochrome P450
Comprehensive Examination Collection - 150 Questions Page 3
, PORTAGE LEARNING | NURS 231 PATHOPHYSIOLOGY ALL EXAMS {LATEST UPDATE}
B. Formation of the toxic metabolite NAPQI that depletes glutathione and binds cellular proteins
*[CORRECT]*
C. Inhibition of mitochondrial DNA polymerase
D. Blockade of the Na+/K+ ATPase causing cell swelling
Correct Answer: B
Rationale: Acetaminophen is metabolized by CYP2E1 to the reactive intermediate N-acetyl-p-benzoquinone imine (NAPQI). At
therapeutic doses NAPQI is detoxified by glutathione; in overdose, glutathione is depleted and NAPQI covalently binds hepatic
proteins, producing centrilobular necrosis. N-acetylcysteine replenishes glutathione and is the antidote. Free radical injury does
occur secondarily, but direct NAPQI-protein adducts are the primary mechanism. The Na+/K+ ATPase failure is a downstream
consequence of membrane damage, not a cause.
Q10: A 72-year-old patient exhibits findings attributed to cellular aging. Which molecular mechanism is most
closely associated with the Hayflick limit, the finite replicative lifespan of somatic cells?
A. Progressive shortening of telomeres with each cell division *[CORRECT]*
B. Accumulation of lipofuscin in lysosomes
C. Activation of p53 tumor suppressor
D. Decline in mitochondrial membrane potential
Correct Answer: A
Rationale: Telomeres are hexameric repeats capping chromosome ends that shorten with each somatic cell division because
DNA polymerase cannot replicate the lagging strand terminus. When telomeres reach a critical length, cells exit the cell cycle
(replicative senescence, the Hayflick limit). Germline and stem cells express telomerase, which extends telomeres and bypasses
this limit; 85-90% of cancers reactivate telomerase. Lipofuscin ("wear-and-tear" pigment) and mitochondrial decline are aging
features but do not determine the replicative limit.
Q11: A 58-year-old male with longstanding untreated hypercalcemia of malignancy develops metastatic calcification
in the gastric mucosa, lungs, and kidneys. Which mechanism best explains this pattern?
A. Necrotic tissue serving as a focus for calcium deposition
B. Normal tissue calcium precipitation due to hypercalcemia in alkaline environments *[CORRECT]*
C. Vitamin D toxicity causing osteoid mineralization
D. Impaired renal phosphate excretion causing calcium precipitation
Correct Answer: B
Rationale: Metastatic calcification occurs when elevated serum calcium (or phosphate) precipitates in otherwise normal tissues,
particularly those that acidify their lumina and become alkaline (gastric mucosa, renal tubules, pulmonary alveoli). Dystrophic
calcification, by contrast, occurs in dead or damaged tissues with normal serum calcium (atheromas, caseous nodules, psammoma
bodies). The distinction is pathophysiologically important: metastatic calcification implies a systemic calcium-phosphate
disorder; dystrophic calcification is a local response to injury.
Q12: A 4-year-old child with X-linked recessive chronic granulomatous disease suffers recurrent infections with
catalase-positive organisms such as Staphylococcus aureus and Serratia. Which cellular defect most directly explains
this susceptibility?
A. Deficiency of NADPH oxidase in phagocytes *[CORRECT]*
B. Absence of complement C3
C. Defective T-cell receptor signaling
D. Myeloperoxidase deficiency
Comprehensive Examination Collection - 150 Questions Page 4
PORTAGE LEARNING
NURS 231 PATHOPHYSIOLOGY
ALL EXAMS {LATEST UPDATE}
Comprehensive Examination Collection
Aligned with Portage Learning NURS 231 Course Syllabus, NCLEX-RN Pathophysiology Standards, and
Pathophysiology Competencies (2026/2027 Edition)
Total Questions 150 Cognitive Mix 20% Recall / 50% Application / 30% Analysis
Sections 12 Question Style 75% Scenario-based / 25% Direct Knowledge
Format MCQ (4 options, 1Special
correct)Items 20 Clinical Reasoning / 15 Lab Values / 15 Mechanisms
Instructions: Select the single best answer for each question. Rationales follow every item and reference NURS 231
curriculum content, NCLEX-RN standards, and core pathophysiology principles.
Section 1: Cellular Injury, Adaptation, & Death
Questions: 15 | Focus: Cellular adaptation, reversible vs. irreversible injury, necrosis types, apoptosis, free radicals,
oxidative stress, cellular aging
Q1: A 68-year-old male with longstanding essential hypertension has an echocardiogram demonstrating increased
left ventricular wall thickness without an increase in chamber size. Which cellular adaptation best explains this
finding?
A. Atrophy due to decreased workload
B. Hypertrophy due to increased workload *[CORRECT]*
C. Hyperplasia due to hormonal stimulation
D. Metaplasia due to chronic irritation
Correct Answer: B
Rationale: Pressure-overload hypertrophy is the dominant adaptation in systemic hypertension; cardiac myocytes, which are
terminally differentiated and cannot divide, increase in cell size (hypertrophy) to generate higher systolic pressures. Atrophy
would reduce wall thickness, hyperplasia requires cell division (not possible in myocytes), and metaplasia is a reversible
substitution of one adult cell type for another (e.g., Barrett esophagus), not a response to pressure overload. NURS 231
emphasizes that hypertrophy and hyperplasia may coexist in hormonally responsive tissue, but in myocardium only hypertrophy
occurs.
Q2: A 55-year-old female with chronic gastroesophageal reflux disease undergoes endoscopy. Biopsy of the distal
esophagus shows columnar epithelium replacing the normal squamous epithelium. Which adaptation is described,
and what is its clinical significance?
A. Hypertrophy; benign response with no malignant potential
B. Hyperplasia; benign increase in cell number
C. Metaplasia; premalignant lesion with risk of adenocarcinoma *[CORRECT]*
D. Dysplasia; already malignant and requires immediate resection
Comprehensive Examination Collection - 150 Questions Page 1
,PORTAGE LEARNING | NURS 231 PATHOPHYSIOLOGY ALL EXAMS {LATEST UPDATE}
Correct Answer: C
Rationale: Barrett esophagus is the classic example of intestinal metaplasia - a reversible substitution of squamous epithelium
with columnar (goblet-cell-containing) epithelium better suited to resist acidic reflux. While the change itself is adaptive, it
carries a 30- to 125-fold increased risk of esophageal adenocarcinoma through progression to dysplasia. Hypertrophy and
hyperplasia increase cell size/number without changing cell type. Dysplasia denotes disordered growth and is not yet invasive
carcinoma but is a later, more ominous step than metaplasia.
Q3: A researcher examines a tissue specimen under electron microscopy after 20 minutes of complete ischemia.
Which finding most reliably distinguishes reversible from irreversible cellular injury?
A. Swelling of the endoplasmic reticulum and loss of ribosomes
B. Severe mitochondrial vacuolization and rupture of the outer membrane *[CORRECT]*
C. Cloudy swelling of the cell with redistribution of fluid
D. Decreased glycogen content and lipid accumulation
Correct Answer: B
Rationale: The transition to irreversible injury is marked structurally by severe mitochondrial damage (vacuolization, amorphous
densities, membrane rupture) and by lysosomal rupture releasing hydrolases. ER swelling, cloudy swelling, glycogen depletion,
and fatty change are features of reversible injury that resolve if perfusion is restored. Membrane integrity - especially of
mitochondria and lysosomes - is the critical threshold; once crossed, cell death is inevitable even with reperfusion.
Q4: A 45-year-old male sustains complete occlusion of the left anterior descending coronary artery. Autopsy 48
hours later shows a firm, pale, wedge-shaped lesion with preservation of cellular outlines. Which pattern of necrosis
is present?
A. Liquefactive necrosis
B. Caseous necrosis
C. Coagulative necrosis *[CORRECT]*
D. Fat necrosis
Correct Answer: C
Rationale: Coagulative necrosis is the hallmark of ischemic injury in all solid tissues except the brain. Protein denaturation
preserves cellular architecture ("tombstone" appearance) for days, producing the firm, pale infarct described. Liquefactive
necrosis occurs in the CNS (ischemic) and in bacterial abscesses where neutrophil enzymes digest tissue into liquid. Caseous
necrosis (TB, fungal) is a cheese-like mix of coagulative and liquefactive. Fat necrosis occurs in pancreatic and breast tissue
following lipase action.
Q5: A 30-year-old patient with pulmonary tuberculosis has a lung lesion demonstrating amorphous, cheese-like
debris surrounded by a granulomatous rim. Which type of necrosis is most characteristic of this lesion?
A. Coagulative necrosis
B. Caseous necrosis *[CORRECT]*
C. Fibrinoid necrosis
D. Gangrenous necrosis
Correct Answer: B
Rationale: Caseous necrosis ("cheese-like") is encountered most often in Mycobacterium tuberculosis infection and certain
fungal infections. It is enclosed by a granulomatous inflammatory response (epithelioid cells, Langhans giant cells) and
represents a distinct variant in which the dead cells lose all structure but retain an amorphous, granular appearance. Fibrinoid
necrosis affects vessel walls in immune-mediated vasculitis; gangrenous necrosis describes ischemic coagulative necrosis of a
limb, often with bacterial infection (wet gangrene).
Comprehensive Examination Collection - 150 Questions Page 2
,PORTAGE LEARNING | NURS 231 PATHOPHYSIOLOGY ALL EXAMS {LATEST UPDATE}
Q6: A 22-year-old female develops acute pancreatitis after alcohol binge. Peripancreatic tissue shows chalky-white
deposits with saponification. Which form of necrosis is occurring?
A. Fat necrosis *[CORRECT]*
B. Liquefactive necrosis
C. Caseous necrosis
D. Fibrinoid necrosis
Correct Answer: A
Rationale: Fat necrosis follows liberation of activated pancreatic lipases into adipose tissue. Lipases split triglycerides into free
fatty acids that combine with calcium to form calcium soaps (saponification), producing the chalky-white deposits seen grossly.
While it can also occur after traumatic fat injury (breast), acute pancreatitis is the classic scenario. Liquefactive necrosis involves
enzymatic digestion to liquid pus; caseous is TB-related; fibrinoid is vascular and immune-mediated.
Q7: A 60-year-old male with a 40-pack-year smoking history has sputum cytology showing pleomorphic bronchial
epithelial cells with hyperchromatic, irregular nuclei and disordered maturation. The cells have not breached the
basement membrane. Which cellular alteration does this represent?
A. Metaplasia
B. Dysplasia *[CORRECT]*
C. Anaplasia
D. Hypertrophy
Correct Answer: B
Rationale: Dysplasia is disordered cellular growth - pleomorphism, hyperchromatic nuclei, abnormal nuclear-to-cytoplasmic
ratio, and loss of polarity - that remains non-invasive (no basement membrane breach). It is a premalignant change often arising
in metaplastic epithelium exposed to carcinogens such as tobacco smoke. Metaplasia is a reversible cell-type substitution without
atypia. Anaplasia describes malignant loss of differentiation (frank cancer). Hypertrophy is increased cell size without atypia.
Q8: A term infant is born with webbed neck, low posterior hairline, and short stature. Genetic testing reveals
monosomy X (45,X). During embryonic development, the loss of oocytes in this patient is mediated primarily by
which process?
A. Coagulative necrosis
B. Apoptosis *[CORRECT]*
C. Autophagy
D. Pyroptosis
Correct Answer: B
Rationale: Apoptosis is programmed cell death, an energy-dependent, gene-regulated process that eliminates damaged, surplus,
or senescent cells without eliciting inflammation. Physiologic apoptosis removes interdigital webbing, shapes organs, and deletes
self-reactive lymphocytes; pathologic apoptosis causes embryonic developmental defects and hormone-dependent involution.
Turner syndrome (45,X) features accelerated ovarian follicular apoptosis, producing streak ovaries and hypergonadotropic
hypogonadism. Necrosis elicits inflammation; autophagy is a survival response to nutrient stress.
Q9: A biomedical researcher exposes cultured hepatocytes to high-dose acetaminophen. The cells deplete
glutathione and accumulate reactive oxygen species. Which mechanism is most directly responsible for
acetaminophen-induced hepatocellular injury?
A. Direct membrane lipid peroxidation by cytochrome P450
Comprehensive Examination Collection - 150 Questions Page 3
, PORTAGE LEARNING | NURS 231 PATHOPHYSIOLOGY ALL EXAMS {LATEST UPDATE}
B. Formation of the toxic metabolite NAPQI that depletes glutathione and binds cellular proteins
*[CORRECT]*
C. Inhibition of mitochondrial DNA polymerase
D. Blockade of the Na+/K+ ATPase causing cell swelling
Correct Answer: B
Rationale: Acetaminophen is metabolized by CYP2E1 to the reactive intermediate N-acetyl-p-benzoquinone imine (NAPQI). At
therapeutic doses NAPQI is detoxified by glutathione; in overdose, glutathione is depleted and NAPQI covalently binds hepatic
proteins, producing centrilobular necrosis. N-acetylcysteine replenishes glutathione and is the antidote. Free radical injury does
occur secondarily, but direct NAPQI-protein adducts are the primary mechanism. The Na+/K+ ATPase failure is a downstream
consequence of membrane damage, not a cause.
Q10: A 72-year-old patient exhibits findings attributed to cellular aging. Which molecular mechanism is most
closely associated with the Hayflick limit, the finite replicative lifespan of somatic cells?
A. Progressive shortening of telomeres with each cell division *[CORRECT]*
B. Accumulation of lipofuscin in lysosomes
C. Activation of p53 tumor suppressor
D. Decline in mitochondrial membrane potential
Correct Answer: A
Rationale: Telomeres are hexameric repeats capping chromosome ends that shorten with each somatic cell division because
DNA polymerase cannot replicate the lagging strand terminus. When telomeres reach a critical length, cells exit the cell cycle
(replicative senescence, the Hayflick limit). Germline and stem cells express telomerase, which extends telomeres and bypasses
this limit; 85-90% of cancers reactivate telomerase. Lipofuscin ("wear-and-tear" pigment) and mitochondrial decline are aging
features but do not determine the replicative limit.
Q11: A 58-year-old male with longstanding untreated hypercalcemia of malignancy develops metastatic calcification
in the gastric mucosa, lungs, and kidneys. Which mechanism best explains this pattern?
A. Necrotic tissue serving as a focus for calcium deposition
B. Normal tissue calcium precipitation due to hypercalcemia in alkaline environments *[CORRECT]*
C. Vitamin D toxicity causing osteoid mineralization
D. Impaired renal phosphate excretion causing calcium precipitation
Correct Answer: B
Rationale: Metastatic calcification occurs when elevated serum calcium (or phosphate) precipitates in otherwise normal tissues,
particularly those that acidify their lumina and become alkaline (gastric mucosa, renal tubules, pulmonary alveoli). Dystrophic
calcification, by contrast, occurs in dead or damaged tissues with normal serum calcium (atheromas, caseous nodules, psammoma
bodies). The distinction is pathophysiologically important: metastatic calcification implies a systemic calcium-phosphate
disorder; dystrophic calcification is a local response to injury.
Q12: A 4-year-old child with X-linked recessive chronic granulomatous disease suffers recurrent infections with
catalase-positive organisms such as Staphylococcus aureus and Serratia. Which cellular defect most directly explains
this susceptibility?
A. Deficiency of NADPH oxidase in phagocytes *[CORRECT]*
B. Absence of complement C3
C. Defective T-cell receptor signaling
D. Myeloperoxidase deficiency
Comprehensive Examination Collection - 150 Questions Page 4
