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WGU D236 PATHOPHYSIOLOGY OBJECTIVE ASSESSMENT
2026/2027 | Grade A Verified | Complete Exam Prep | Pass
Guaranteed - A+ Graded
Section 1: Cellular Adaptation, Injury & Neoplasia (Q1-12)
Q1. A 65-year-old male with chronic hypertension has an enlarged left ventricular
wall on echocardiogram. This adaptive response to chronic pressure overload is
classified as:
A. Hyperplasia
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Correct Answer: B. Hypertrophy [CORRECT]
Rationale: Hypertrophy is an increase in cell size resulting in enlarged tissue mass;
cardiac muscle responds to chronic pressure overload by enlarging individual
cardiomyocytes because adult cardiomyocytes cannot undergo significant
hyperplasia. Hyperplasia (A) requires cell division. Metaplasia (C) involves cell type
switching. Dysplasia (D) is disordered, premalignant growth.
Q2. A patient with chronic reflux esophagitis develops columnar epithelium with
goblet cells replacing normal squamous mucosa. This cellular change is:
A. Atrophy
B. Hypertrophy
C. Metaplasia
D. Anaplasia
Correct Answer: C. Metaplasia [CORRECT]
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by
another; Barrett esophagus represents intestinal metaplasia in response to chronic
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acid injury. Atrophy (A) is decreased cell size. Hypertrophy (B) is increased cell size
without type change. Anaplasia (D) is loss of differentiation in malignancy.
Q3. A patient suffers an acute myocardial infarction. Within 24 hours, the affected
myocardium shows preserved cellular outlines with loss of nuclei and intense
eosinophilia. This pattern represents:
A. Liquefactive necrosis
B. Coagulative necrosis
C. Caseous necrosis
D. Fat necrosis
Correct Answer: B. Coagulative necrosis [CORRECT]
Rationale: Coagulative necrosis is the classic pattern of ischemic injury in solid
organs because denaturation of structural proteins preserves tissue architecture for
days, leaving ghost outlines of dead cells. Liquefactive necrosis (A) occurs in brain
tissue or abscesses. Caseous necrosis (C) is friable and cheese-like, seen in TB. Fat
necrosis (D) involves adipose tissue with calcium soap formation.
Q4. A patient with severe peripheral arterial disease develops dry, black, leathery
necrosis of the toes without infection. This is classified as:
A. Wet gangrene
B. Dry gangrene
C. Gas gangrene
D. Coagulative necrosis
Correct Answer: B. Dry gangrene [CORRECT]
Rationale: Dry gangrene is ischemic necrosis of distal extremities that remains dry
due to limited blood flow without bacterial infection, producing a dark, shrunken,
leathery eschar. Wet gangrene (A) involves superinfection with liquefaction. Gas
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gangrene (C) involves clostridial infection with gas formation. Coagulative necrosis
(D) is a microscopic pattern, not a clinical description.
Q5. A biopsy of a lymph node in a patient with tuberculosis reveals amorphous
granular debris surrounded by granulomatous inflammation. The necrotic material is:
A. Coagulative necrosis
B. Liquefactive necrosis
C. Caseous necrosis
D. Fat necrosis
Correct Answer: C. Caseous necrosis [CORRECT]
Rationale: Caseous necrosis is a distinctive form of cell death seen in tuberculosis,
appearing as soft, friable, cheese-like granular debris without preserved tissue
architecture, surrounded by granulomas. Coagulative necrosis (A) maintains tissue
outlines. Liquefactive necrosis (B) forms liquid pus. Fat necrosis (D) involves adipose
tissue with chalky white calcium deposits.
Q6. Apoptosis differs from necrosis primarily in that apoptosis:
A. Causes cell swelling and membrane rupture
B. Is a programmed, energy-dependent process without inflammation
C. Results from acute severe injury and ATP depletion
D. Produces enzymatic digestion of tissue by neutrophils
Correct Answer: B. Is a programmed, energy-dependent process without
inflammation [CORRECT]
Rationale: Apoptosis is programmed cell death characterized by cell shrinkage,
chromatin condensation, membrane blebbing, and formation of apoptotic bodies
phagocytosed without inflammation; it requires ATP and caspase activation. Necrosis
(A, C) involves cell swelling, membrane rupture, and inflammatory response from ATP
depletion. Neutrophilic enzymatic digestion (D) describes liquefactive necrosis.
, 4
Q7. A tumor suppressor gene that prevents cell cycle progression when DNA
damage is detected and induces apoptosis is:
A. RAS
B. MYC
C. p53
D. HER2/neu
Correct Answer: C. p53 [CORRECT]
Rationale: p53 is the "guardian of the genome" that arrests the cell cycle at G1/S
checkpoint to allow DNA repair or initiates apoptosis if damage is irreparable;
mutations are found in over 50% of human cancers. RAS (A), MYC (B), and HER2/neu
(D) are oncogenes that promote cell proliferation when mutated or overexpressed.
Q8. A patient with breast cancer has amplification of the HER2/neu gene. This
genetic alteration is classified as:
A. Tumor suppressor gene mutation
B. Oncogene activation
C. Chromosomal deletion
D. Trinucleotide repeat expansion
Correct Answer: B. Oncogene activation [CORRECT]
Rationale: HER2/neu is a proto-oncogene encoding a growth factor receptor;
amplification leads to constitutive signaling and uncontrolled cellular proliferation,
defining HER2-positive breast cancer. Tumor suppressor mutations (A) inactivate
growth control. Chromosomal deletions (C) typically remove tumor suppressors.
Trinucleotide repeats (D) cause disorders like Huntington disease.
Q9. A patient with lung cancer develops hypercalcemia, bone pain, and suppressed
PTH. The paraneoplastic mediator is:
WGU D236 PATHOPHYSIOLOGY OBJECTIVE ASSESSMENT
2026/2027 | Grade A Verified | Complete Exam Prep | Pass
Guaranteed - A+ Graded
Section 1: Cellular Adaptation, Injury & Neoplasia (Q1-12)
Q1. A 65-year-old male with chronic hypertension has an enlarged left ventricular
wall on echocardiogram. This adaptive response to chronic pressure overload is
classified as:
A. Hyperplasia
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Correct Answer: B. Hypertrophy [CORRECT]
Rationale: Hypertrophy is an increase in cell size resulting in enlarged tissue mass;
cardiac muscle responds to chronic pressure overload by enlarging individual
cardiomyocytes because adult cardiomyocytes cannot undergo significant
hyperplasia. Hyperplasia (A) requires cell division. Metaplasia (C) involves cell type
switching. Dysplasia (D) is disordered, premalignant growth.
Q2. A patient with chronic reflux esophagitis develops columnar epithelium with
goblet cells replacing normal squamous mucosa. This cellular change is:
A. Atrophy
B. Hypertrophy
C. Metaplasia
D. Anaplasia
Correct Answer: C. Metaplasia [CORRECT]
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by
another; Barrett esophagus represents intestinal metaplasia in response to chronic
,2
acid injury. Atrophy (A) is decreased cell size. Hypertrophy (B) is increased cell size
without type change. Anaplasia (D) is loss of differentiation in malignancy.
Q3. A patient suffers an acute myocardial infarction. Within 24 hours, the affected
myocardium shows preserved cellular outlines with loss of nuclei and intense
eosinophilia. This pattern represents:
A. Liquefactive necrosis
B. Coagulative necrosis
C. Caseous necrosis
D. Fat necrosis
Correct Answer: B. Coagulative necrosis [CORRECT]
Rationale: Coagulative necrosis is the classic pattern of ischemic injury in solid
organs because denaturation of structural proteins preserves tissue architecture for
days, leaving ghost outlines of dead cells. Liquefactive necrosis (A) occurs in brain
tissue or abscesses. Caseous necrosis (C) is friable and cheese-like, seen in TB. Fat
necrosis (D) involves adipose tissue with calcium soap formation.
Q4. A patient with severe peripheral arterial disease develops dry, black, leathery
necrosis of the toes without infection. This is classified as:
A. Wet gangrene
B. Dry gangrene
C. Gas gangrene
D. Coagulative necrosis
Correct Answer: B. Dry gangrene [CORRECT]
Rationale: Dry gangrene is ischemic necrosis of distal extremities that remains dry
due to limited blood flow without bacterial infection, producing a dark, shrunken,
leathery eschar. Wet gangrene (A) involves superinfection with liquefaction. Gas
,3
gangrene (C) involves clostridial infection with gas formation. Coagulative necrosis
(D) is a microscopic pattern, not a clinical description.
Q5. A biopsy of a lymph node in a patient with tuberculosis reveals amorphous
granular debris surrounded by granulomatous inflammation. The necrotic material is:
A. Coagulative necrosis
B. Liquefactive necrosis
C. Caseous necrosis
D. Fat necrosis
Correct Answer: C. Caseous necrosis [CORRECT]
Rationale: Caseous necrosis is a distinctive form of cell death seen in tuberculosis,
appearing as soft, friable, cheese-like granular debris without preserved tissue
architecture, surrounded by granulomas. Coagulative necrosis (A) maintains tissue
outlines. Liquefactive necrosis (B) forms liquid pus. Fat necrosis (D) involves adipose
tissue with chalky white calcium deposits.
Q6. Apoptosis differs from necrosis primarily in that apoptosis:
A. Causes cell swelling and membrane rupture
B. Is a programmed, energy-dependent process without inflammation
C. Results from acute severe injury and ATP depletion
D. Produces enzymatic digestion of tissue by neutrophils
Correct Answer: B. Is a programmed, energy-dependent process without
inflammation [CORRECT]
Rationale: Apoptosis is programmed cell death characterized by cell shrinkage,
chromatin condensation, membrane blebbing, and formation of apoptotic bodies
phagocytosed without inflammation; it requires ATP and caspase activation. Necrosis
(A, C) involves cell swelling, membrane rupture, and inflammatory response from ATP
depletion. Neutrophilic enzymatic digestion (D) describes liquefactive necrosis.
, 4
Q7. A tumor suppressor gene that prevents cell cycle progression when DNA
damage is detected and induces apoptosis is:
A. RAS
B. MYC
C. p53
D. HER2/neu
Correct Answer: C. p53 [CORRECT]
Rationale: p53 is the "guardian of the genome" that arrests the cell cycle at G1/S
checkpoint to allow DNA repair or initiates apoptosis if damage is irreparable;
mutations are found in over 50% of human cancers. RAS (A), MYC (B), and HER2/neu
(D) are oncogenes that promote cell proliferation when mutated or overexpressed.
Q8. A patient with breast cancer has amplification of the HER2/neu gene. This
genetic alteration is classified as:
A. Tumor suppressor gene mutation
B. Oncogene activation
C. Chromosomal deletion
D. Trinucleotide repeat expansion
Correct Answer: B. Oncogene activation [CORRECT]
Rationale: HER2/neu is a proto-oncogene encoding a growth factor receptor;
amplification leads to constitutive signaling and uncontrolled cellular proliferation,
defining HER2-positive breast cancer. Tumor suppressor mutations (A) inactivate
growth control. Chromosomal deletions (C) typically remove tumor suppressors.
Trinucleotide repeats (D) cause disorders like Huntington disease.
Q9. A patient with lung cancer develops hypercalcemia, bone pain, and suppressed
PTH. The paraneoplastic mediator is:
