WG U P AT H O P H Y S I O L O G Y · O B J E C T I V E
AS S E S S M E N T ·2 0 2 6
D236 OA V2
Exam Prep
100 Multiple-Choice Questions with Answers and Detailed
Rationales
EDI TI ON F O R M AT
2026 Guarantee Pass Inline Answers + Rationales
G U AR AN T E E PAS S S T U D Y E D I T I O N WG U · D 2 3 6
,D236 OA V2 Exam Prep · WGU Pathophysiology · 100 MCQs with Detailed Rationales
D236 OA V2 Exam Prep
WGU Pathophysiology · Objective Assessment · 2026 Edition
This study exam contains 100 multiple-choice questions calibrated to the WGU D236 Pathophysiology Objective
Assessment (OA V2). Questions span the full D236 content domain: cellular injury and inflammation, endocrine
disorders, cardiovascular, respiratory, renal, gastrointestinal and hepatic, neurological, hematologic, and
immune/infectious pathophysiology. Each question is followed by four options (A-D), the correct answer, and a
detailed rationale explaining why the correct option is right and why the distractors are wrong. Read the stem
carefully, commit to an answer before reading the rationale, then verify your reasoning against the explanation.
This active recall cycle is the most efficient way to consolidate pathophysiology for the OA.
How to use this exam
• Active recall first: cover the answer box, read the stem, write your answer on paper, then reveal.
• Diagnose by rationale: if you missed it, re-read the entire rationale and note the misconception.
• Topic rotation: questions are grouped by D236 domain but presented as one continuous exam to mirror the OA.
• Final-pass sprint: the last page is a high-yield cheat sheet of the most commonly tested facts.
100 Questions · Detailed Rationales · One Continuous Exam
Question 1 · Cellular Adaptation
A 55-year-old male with longstanding hypertension has an
echocardiogram revealing an enlarged left ventricle with increased wall
thickness. This cellular adaptation is best described as:
A. Hypertrophy, an increase in cell size
B. Hyperplasia, an increase in cell number
C. Metaplasia, a reversible cell type change
D. Dysplasia, disordered cellular maturation
CORRECT ANSWER: A
RATIONALE
Hypertrophy is an increase in cell size without an increase in cell number, classically seen in cardiac and skeletal muscle
cells that cannot divide. In response to chronic pressure overload from hypertension, individual ventricular myocytes
enlarge, producing a thick-walled left ventricle. Hyperplasia (B) is an increase in cell number and occurs in tissues capable
of mitosis such as endometrium and liver. Metaplasia (C) is a reversible replacement of one differentiated cell type by
another, as in bronchial squamous metaplasia from smoking. Dysplasia (D) is disordered growth and maturation, often
premalignant; it is not the adaptive response to pressure overload.
Guarantee Pass Study Edition · 2026 Page 1
,D236 OA V2 Exam Prep · WGU Pathophysiology · 100 MCQs with Detailed Rationales
Question 2 · Cellular Adaptation
A chronic smoker's bronchial epithelium changes from ciliated
pseudostratified columnar to stratified squamous. This adaptation is best
classified as:
A. Anaplasia
B. Metaplasia
C. Atrophy
D. Hypertrophy
CORRECT ANSWER: B
RATIONALE
Metaplasia is the reversible replacement of one adult cell type by another adult cell type, typically as an adaptive substitution
of cells sensitive to stress with cells better able to withstand the hostile environment. In smokers, the ciliated columnar
epithelium of the bronchi is replaced by stratified squamous epithelium, which is more resistant to injury but loses
mucociliary clearance function, predisposing to infection. Anaplasia (A) refers to lack of differentiation characteristic of
malignant tumors. Atrophy (C) is a decrease in cell size or number. Hypertrophy (D) is an increase in cell size. Only
metaplasia describes a switch from one mature cell type to another.
Question 3 · Necrosis vs Apoptosis
Which of the following features most strongly distinguishes apoptosis from
necrosis?
A. Marked acute inflammatory response in the surrounding tissue
B. Rupture of the plasma membrane with release of cellular contents
C. Energy-dependent programmed cell death with intact membranes
D. Random DNA degradation producing a 'smear' pattern on gel
electrophoresis
CORRECT ANSWER: C
RATIONALE
Apoptosis is an active, energy-dependent, genetically regulated form of cell death in which the plasma membrane remains
intact and cellular contents are not spilled, so there is little to no surrounding inflammation. Caspases cleave DNA in a
controlled fashion producing ladder-like fragments. Necrosis (A, B) is pathologic, characterized by membrane rupture,
release of contents, and a robust inflammatory response. Random DNA degradation (D) producing a smear is typical of
necrosis. Apoptosis plays roles in embryogenesis, hormone-dependent involution, and elimination of damaged cells; failure
of apoptosis contributes to autoimmunity and cancer.
Guarantee Pass Study Edition · 2026 Page 2
, D236 OA V2 Exam Prep · WGU Pathophysiology · 100 MCQs with Detailed Rationales
Question 4 · Patterns of Necrosis
A patient dies 3 days after an acute myocardial infarction. Gross
examination of the heart at autopsy shows a firm, pale yellow-tan area with
a hyperemic border in the left ventricle. This pattern of necrosis is:
A. Liquefactive
B. Caseous
C. Coagulative
D. Fat necrosis
CORRECT ANSWER: C
RATIONALE
Coagulative necrosis is the pattern seen in ischemic injury to most solid organs except the brain. The architecture of dead
tissue is preserved for days to weeks because injury denatures structural proteins and enzymes, blocking proteolysis. The
classic example is myocardial infarction, where the necrotic muscle retains its striations and is firm and pale. Liquefactive
necrosis (A) is seen in brain ischemia and bacterial abscesses, where enzymatic digestion produces liquid debris. Caseous
necrosis (B) is cheese-like and characteristic of tuberculosis. Fat necrosis (D) occurs in pancreatic injury and breast trauma,
producing chalky white foci from saponification.
Question 5 · Patterns of Necrosis
A 24-year-old male suffers a stroke involving the left middle cerebral
artery territory. Three days later, CT shows a region of brain parenchyma
that has undergone softening and liquefaction. This is an example of:
A. Coagulative necrosis
B. Liquefactive necrosis
C. Caseous necrosis
D. Fibrinoid necrosis
CORRECT ANSWER: B
RATIONALE
Liquefactive necrosis is the dominant pattern in the brain following ischemic injury. Because brain tissue contains little
connective tissue stroma but abundant lipids and digestive enzymes, ischemic injury rapidly denatures proteins but
simultaneously releases lysosomal enzymes that liquefy the parenchyma. The result is a cystic cavity filled with debris and
macrophages. Coagulative necrosis (A) is the typical pattern in most solid organs such as heart and kidney. Caseous necrosis
(C) is characteristic of tuberculosis. Fibrinoid necrosis (D) affects vessel walls in malignant hypertension and immune
vasculitis, not the brain parenchyma.
Guarantee Pass Study Edition · 2026 Page 3
AS S E S S M E N T ·2 0 2 6
D236 OA V2
Exam Prep
100 Multiple-Choice Questions with Answers and Detailed
Rationales
EDI TI ON F O R M AT
2026 Guarantee Pass Inline Answers + Rationales
G U AR AN T E E PAS S S T U D Y E D I T I O N WG U · D 2 3 6
,D236 OA V2 Exam Prep · WGU Pathophysiology · 100 MCQs with Detailed Rationales
D236 OA V2 Exam Prep
WGU Pathophysiology · Objective Assessment · 2026 Edition
This study exam contains 100 multiple-choice questions calibrated to the WGU D236 Pathophysiology Objective
Assessment (OA V2). Questions span the full D236 content domain: cellular injury and inflammation, endocrine
disorders, cardiovascular, respiratory, renal, gastrointestinal and hepatic, neurological, hematologic, and
immune/infectious pathophysiology. Each question is followed by four options (A-D), the correct answer, and a
detailed rationale explaining why the correct option is right and why the distractors are wrong. Read the stem
carefully, commit to an answer before reading the rationale, then verify your reasoning against the explanation.
This active recall cycle is the most efficient way to consolidate pathophysiology for the OA.
How to use this exam
• Active recall first: cover the answer box, read the stem, write your answer on paper, then reveal.
• Diagnose by rationale: if you missed it, re-read the entire rationale and note the misconception.
• Topic rotation: questions are grouped by D236 domain but presented as one continuous exam to mirror the OA.
• Final-pass sprint: the last page is a high-yield cheat sheet of the most commonly tested facts.
100 Questions · Detailed Rationales · One Continuous Exam
Question 1 · Cellular Adaptation
A 55-year-old male with longstanding hypertension has an
echocardiogram revealing an enlarged left ventricle with increased wall
thickness. This cellular adaptation is best described as:
A. Hypertrophy, an increase in cell size
B. Hyperplasia, an increase in cell number
C. Metaplasia, a reversible cell type change
D. Dysplasia, disordered cellular maturation
CORRECT ANSWER: A
RATIONALE
Hypertrophy is an increase in cell size without an increase in cell number, classically seen in cardiac and skeletal muscle
cells that cannot divide. In response to chronic pressure overload from hypertension, individual ventricular myocytes
enlarge, producing a thick-walled left ventricle. Hyperplasia (B) is an increase in cell number and occurs in tissues capable
of mitosis such as endometrium and liver. Metaplasia (C) is a reversible replacement of one differentiated cell type by
another, as in bronchial squamous metaplasia from smoking. Dysplasia (D) is disordered growth and maturation, often
premalignant; it is not the adaptive response to pressure overload.
Guarantee Pass Study Edition · 2026 Page 1
,D236 OA V2 Exam Prep · WGU Pathophysiology · 100 MCQs with Detailed Rationales
Question 2 · Cellular Adaptation
A chronic smoker's bronchial epithelium changes from ciliated
pseudostratified columnar to stratified squamous. This adaptation is best
classified as:
A. Anaplasia
B. Metaplasia
C. Atrophy
D. Hypertrophy
CORRECT ANSWER: B
RATIONALE
Metaplasia is the reversible replacement of one adult cell type by another adult cell type, typically as an adaptive substitution
of cells sensitive to stress with cells better able to withstand the hostile environment. In smokers, the ciliated columnar
epithelium of the bronchi is replaced by stratified squamous epithelium, which is more resistant to injury but loses
mucociliary clearance function, predisposing to infection. Anaplasia (A) refers to lack of differentiation characteristic of
malignant tumors. Atrophy (C) is a decrease in cell size or number. Hypertrophy (D) is an increase in cell size. Only
metaplasia describes a switch from one mature cell type to another.
Question 3 · Necrosis vs Apoptosis
Which of the following features most strongly distinguishes apoptosis from
necrosis?
A. Marked acute inflammatory response in the surrounding tissue
B. Rupture of the plasma membrane with release of cellular contents
C. Energy-dependent programmed cell death with intact membranes
D. Random DNA degradation producing a 'smear' pattern on gel
electrophoresis
CORRECT ANSWER: C
RATIONALE
Apoptosis is an active, energy-dependent, genetically regulated form of cell death in which the plasma membrane remains
intact and cellular contents are not spilled, so there is little to no surrounding inflammation. Caspases cleave DNA in a
controlled fashion producing ladder-like fragments. Necrosis (A, B) is pathologic, characterized by membrane rupture,
release of contents, and a robust inflammatory response. Random DNA degradation (D) producing a smear is typical of
necrosis. Apoptosis plays roles in embryogenesis, hormone-dependent involution, and elimination of damaged cells; failure
of apoptosis contributes to autoimmunity and cancer.
Guarantee Pass Study Edition · 2026 Page 2
, D236 OA V2 Exam Prep · WGU Pathophysiology · 100 MCQs with Detailed Rationales
Question 4 · Patterns of Necrosis
A patient dies 3 days after an acute myocardial infarction. Gross
examination of the heart at autopsy shows a firm, pale yellow-tan area with
a hyperemic border in the left ventricle. This pattern of necrosis is:
A. Liquefactive
B. Caseous
C. Coagulative
D. Fat necrosis
CORRECT ANSWER: C
RATIONALE
Coagulative necrosis is the pattern seen in ischemic injury to most solid organs except the brain. The architecture of dead
tissue is preserved for days to weeks because injury denatures structural proteins and enzymes, blocking proteolysis. The
classic example is myocardial infarction, where the necrotic muscle retains its striations and is firm and pale. Liquefactive
necrosis (A) is seen in brain ischemia and bacterial abscesses, where enzymatic digestion produces liquid debris. Caseous
necrosis (B) is cheese-like and characteristic of tuberculosis. Fat necrosis (D) occurs in pancreatic injury and breast trauma,
producing chalky white foci from saponification.
Question 5 · Patterns of Necrosis
A 24-year-old male suffers a stroke involving the left middle cerebral
artery territory. Three days later, CT shows a region of brain parenchyma
that has undergone softening and liquefaction. This is an example of:
A. Coagulative necrosis
B. Liquefactive necrosis
C. Caseous necrosis
D. Fibrinoid necrosis
CORRECT ANSWER: B
RATIONALE
Liquefactive necrosis is the dominant pattern in the brain following ischemic injury. Because brain tissue contains little
connective tissue stroma but abundant lipids and digestive enzymes, ischemic injury rapidly denatures proteins but
simultaneously releases lysosomal enzymes that liquefy the parenchyma. The result is a cystic cavity filled with debris and
macrophages. Coagulative necrosis (A) is the typical pattern in most solid organs such as heart and kidney. Caseous necrosis
(C) is characteristic of tuberculosis. Fibrinoid necrosis (D) affects vessel walls in malignant hypertension and immune
vasculitis, not the brain parenchyma.
Guarantee Pass Study Edition · 2026 Page 3
