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WGU D236 OA V2 – (2026) PATHOPHYSIOLOGY OA EXAM
QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
UPDATE THIS YEAR
WGU D236 OA V2 – (2026) PATHOPHYSIOLOGY OA EXAM
Exam Coverage
Cellular structure, cellular adaptation, injury, death, and mechanisms of disease
Inflammation, immune responses, tissue repair, infection, and systemic inflammatory
responses
Genetics, congenital disorders, neoplasia, and mechanisms of cancer development
Fluid, electrolyte, acid-base, and hemodynamic disturbances
Cardiovascular pathophysiology, ischemia, heart failure, hypertension, and vascular
disorders
Respiratory pathophysiology, ventilation, gas exchange, obstructive and restrictive
disorders
Neurologic pathophysiology, intracranial pressure, cerebrovascular disease, seizures, and
neurodegeneration
Renal, urinary, gastrointestinal, hepatic, and pancreatic pathophysiology
Endocrine, metabolic, hematologic, musculoskeletal, and integumentary disorders
Integrated clinical manifestations, compensatory mechanisms, complications, and
disease progression
1. Which cellular response occurs when a cell increases in size because of increased workload
or stimulation?
A. Hyperplasia
B. Atrophy
C. Hypertrophy
D. Metaplasia
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Answer: C
Rationale: Hypertrophy is an increase in individual cell size, commonly occurring when cells
experience increased functional demand.
2. What distinguishes hyperplasia from hypertrophy at the cellular level?
A. Hyperplasia involves increased cell number, whereas hypertrophy involves increased cell size
B. Hyperplasia always represents malignant transformation
C. Hypertrophy occurs only in epithelial tissues
D. Hyperplasia causes cells to decrease in number
Answer: A
Rationale: Hyperplasia results from an increase in cell number, whereas hypertrophy reflects
enlargement of existing cells.
3. Which cellular adaptation occurs when one mature cell type is replaced by another mature
cell type better able to tolerate chronic irritation?
A. Dysplasia
B. Metaplasia
C. Necrosis
D. Apoptosis
Answer: B
Rationale: Metaplasia is a reversible adaptation in which one differentiated cell type changes to
another in response to environmental stress.
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4. Why can prolonged cellular hypoxia lead to irreversible cellular injury?
A. Oxygen deprivation can impair ATP production, membrane integrity, and essential cellular
functions
B. Hypoxia always increases mitochondrial energy production
C. Hypoxia permanently increases protein synthesis
D. Oxygen deprivation causes immediate cellular proliferation
Answer: A
Rationale: Prolonged oxygen deprivation decreases oxidative phosphorylation and ATP
production, eventually causing membrane, mitochondrial, and nuclear injury.
5. Which organelle is primarily responsible for producing ATP through oxidative
phosphorylation?
A. Golgi apparatus
B. Lysosome
C. Ribosome
D. Mitochondrion
Answer: D
Rationale: Mitochondria generate most cellular ATP through oxidative phosphorylation.
6. What happens to a cell's ATP production when oxygen becomes severely limited?
A. Oxidative phosphorylation decreases and anaerobic metabolism becomes more important
B. Oxidative phosphorylation increases dramatically
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C. Protein synthesis becomes the primary ATP source
D. DNA replication immediately increases
Answer: A
Rationale: Hypoxia reduces mitochondrial oxidative phosphorylation, forcing cells to rely more
heavily on anaerobic glycolysis.
7. Which metabolic change occurs when cells increasingly depend on anaerobic glycolysis
because of inadequate oxygen?
A. Decreased lactate production
B. Increased lactate production and reduced ATP efficiency
C. Increased oxidative phosphorylation
D. Increased oxygen consumption
Answer: B
Rationale: Anaerobic glycolysis produces less ATP and converts pyruvate to lactate, contributing
to intracellular and systemic acidosis.
8. Which cellular change is most characteristic of apoptosis?
A. Uncontrolled cellular swelling followed by inflammation
B. Cell rupture with extensive surrounding tissue damage
C. Programmed cell death involving controlled cellular fragmentation
D. Immediate bacterial invasion of the cell
WGU D236 OA V2 – (2026) PATHOPHYSIOLOGY OA EXAM
QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
UPDATE THIS YEAR
WGU D236 OA V2 – (2026) PATHOPHYSIOLOGY OA EXAM
Exam Coverage
Cellular structure, cellular adaptation, injury, death, and mechanisms of disease
Inflammation, immune responses, tissue repair, infection, and systemic inflammatory
responses
Genetics, congenital disorders, neoplasia, and mechanisms of cancer development
Fluid, electrolyte, acid-base, and hemodynamic disturbances
Cardiovascular pathophysiology, ischemia, heart failure, hypertension, and vascular
disorders
Respiratory pathophysiology, ventilation, gas exchange, obstructive and restrictive
disorders
Neurologic pathophysiology, intracranial pressure, cerebrovascular disease, seizures, and
neurodegeneration
Renal, urinary, gastrointestinal, hepatic, and pancreatic pathophysiology
Endocrine, metabolic, hematologic, musculoskeletal, and integumentary disorders
Integrated clinical manifestations, compensatory mechanisms, complications, and
disease progression
1. Which cellular response occurs when a cell increases in size because of increased workload
or stimulation?
A. Hyperplasia
B. Atrophy
C. Hypertrophy
D. Metaplasia
, Page 2 of 105
Answer: C
Rationale: Hypertrophy is an increase in individual cell size, commonly occurring when cells
experience increased functional demand.
2. What distinguishes hyperplasia from hypertrophy at the cellular level?
A. Hyperplasia involves increased cell number, whereas hypertrophy involves increased cell size
B. Hyperplasia always represents malignant transformation
C. Hypertrophy occurs only in epithelial tissues
D. Hyperplasia causes cells to decrease in number
Answer: A
Rationale: Hyperplasia results from an increase in cell number, whereas hypertrophy reflects
enlargement of existing cells.
3. Which cellular adaptation occurs when one mature cell type is replaced by another mature
cell type better able to tolerate chronic irritation?
A. Dysplasia
B. Metaplasia
C. Necrosis
D. Apoptosis
Answer: B
Rationale: Metaplasia is a reversible adaptation in which one differentiated cell type changes to
another in response to environmental stress.
, Page 3 of 105
4. Why can prolonged cellular hypoxia lead to irreversible cellular injury?
A. Oxygen deprivation can impair ATP production, membrane integrity, and essential cellular
functions
B. Hypoxia always increases mitochondrial energy production
C. Hypoxia permanently increases protein synthesis
D. Oxygen deprivation causes immediate cellular proliferation
Answer: A
Rationale: Prolonged oxygen deprivation decreases oxidative phosphorylation and ATP
production, eventually causing membrane, mitochondrial, and nuclear injury.
5. Which organelle is primarily responsible for producing ATP through oxidative
phosphorylation?
A. Golgi apparatus
B. Lysosome
C. Ribosome
D. Mitochondrion
Answer: D
Rationale: Mitochondria generate most cellular ATP through oxidative phosphorylation.
6. What happens to a cell's ATP production when oxygen becomes severely limited?
A. Oxidative phosphorylation decreases and anaerobic metabolism becomes more important
B. Oxidative phosphorylation increases dramatically
, Page 4 of 105
C. Protein synthesis becomes the primary ATP source
D. DNA replication immediately increases
Answer: A
Rationale: Hypoxia reduces mitochondrial oxidative phosphorylation, forcing cells to rely more
heavily on anaerobic glycolysis.
7. Which metabolic change occurs when cells increasingly depend on anaerobic glycolysis
because of inadequate oxygen?
A. Decreased lactate production
B. Increased lactate production and reduced ATP efficiency
C. Increased oxidative phosphorylation
D. Increased oxygen consumption
Answer: B
Rationale: Anaerobic glycolysis produces less ATP and converts pyruvate to lactate, contributing
to intracellular and systemic acidosis.
8. Which cellular change is most characteristic of apoptosis?
A. Uncontrolled cellular swelling followed by inflammation
B. Cell rupture with extensive surrounding tissue damage
C. Programmed cell death involving controlled cellular fragmentation
D. Immediate bacterial invasion of the cell
