WGU D027 Objective Assessment 2026/2027
Verified Answers — Pathophysiology and Pharmacology
2026/2027 Edition | 155 Multiple-Choice Questions | 8 Sections | Aligned with WGU Course Competencies
Directions: Each question has four options (A–D). The correct option is marked [CORRECT] in accent color. A
detailed rationale follows each question, integrating pathophysiologic mechanisms and pharmacologic principles, with
verification notes against WGU D027 objective assessment competencies. Content spans cellular function and
adaptation, genetics and immunity, infection and acid-base, cardiovascular and hematologic, respiratory and renal,
neurologic and musculoskeletal, endocrine and gastrointestinal, and oncology with pharmacologic principles.
Distractors represent common pathophysiology and pharmacology misconceptions (e.g., confusing cellular adaptation
types, misidentifying disease mechanisms, confusing medication classifications, incorrect drug mechanism of action,
misapplying pharmacokinetic principles).
Section 1: Cellular Function, Injury, and Adaptation
Cell Structure, Injury Mechanisms, Necrosis, Apoptosis, Atrophy, Hypertrophy, Hyperplasia, Metaplasia, and Dysplasia
(Q1-Q15)
Q1: A patient with chronic hypertension develops increased cardiac muscle mass as the heart works
harder to pump against elevated afterload. This cellular adaptation is BEST described as:
A. Hyperplasia (increased cell number)
B. Hypertrophy (increased cell size) [CORRECT]
C. Metaplasia (cell type replacement)
D. Dysplasia (abnormal cell maturation)
Correct Answer: B
Rationale: Hypertrophy is an increase in CELL SIZE in response to increased workload or stress, classically
seen in cardiac muscle with chronic hypertension or skeletal muscle with exercise. Hyperplasia is increased cell
NUMBER (e.g., glandular tissue); metaplasia is replacement of one cell type with another (e.g., Barrett
esophagus); dysplasia is disordered cell maturation (pre-neoplastic). D027-aligned verification: cardiac and
skeletal muscle cells cannot divide (post-mitotic), so they adapt exclusively via hypertrophy.
Page 1
,WGU D027 Objective Assessment 2026/2027 | Verified Answers | 155 Questions
Q2: A 60-year-old patient with chronic GERD develops Barrett esophagus, in which normal
squamous epithelium is replaced by intestinal columnar epithelium. This adaptation is BEST
described as:
A. Hypertrophy
B. Hyperplasia
C. Metaplasia (reversible replacement of one adult cell type with another) [CORRECT]
D. Anaplasia
Correct Answer: C
Rationale: Metaplasia is the reversible replacement of one adult cell type with another, typically in response to
chronic irritation (e.g., Barrett esophagus from GERD, squamous metaplasia in the bronchi of smokers). The
metaplastic tissue is better able to withstand the irritation but has an increased risk of malignant transformation.
D027-aligned verification: metaplasia is reversible if the irritating stimulus is removed; if it persists, progression
to dysplasia and adenocarcinoma may occur.
Q3: A patient who sustained a stroke and has limited use of their left arm develops decreased muscle
mass in that limb. This cellular adaptation is BEST described as:
A. Atrophy (decrease in cell size due to decreased workload or disuse) [CORRECT]
B. Hypertrophy
C. Apoptosis
D. Necrosis
Correct Answer: A
Rationale: Atrophy is a decrease in cell size due to decreased workload, disuse, denervation, inadequate
nutrition, or decreased endocrine stimulation. Disuse atrophy occurs in immobilized limbs (e.g., post-stroke,
casting) and is generally reversible if the underlying cause is corrected. D027-aligned verification: hypertrophy
is increased cell size; apoptosis is programmed cell death; necrosis is pathologic cell death with inflammation.
Q4: A 25-year-old patient has the uterine lining thicken during the proliferative phase of the
menstrual cycle due to estrogen stimulation. This increase in cell NUMBER is BEST described as:
A. Hypertrophy
B. Hyperplasia ( hormonally-induced increase in cell number) [CORRECT]
C. Metaplasia
D. Dysplasia
Correct Answer: B
Rationale: Hyperplasia is an increase in cell NUMBER in response to hormonal stimulation or increased
functional demand. Physiologic hyperplasia occurs in the uterine endometrium during the menstrual cycle and in
breast tissue during pregnancy. D027-aligned verification: pathologic hyperplasia (e.g., endometrial
hyperplasia from unopposed estrogen) increases cancer risk. Hypertrophy (cell size increase) and hyperplasia
(cell number increase) often occur together in some tissues (e.g., uterus in pregnancy).
Page 2
,WGU D027 Objective Assessment 2026/2027 | Verified Answers | 155 Questions
Q5: A cervical biopsy in a 35-year-old woman shows disordered maturation of cells with enlarged,
irregular nuclei and increased mitotic figures. This cellular change is BEST described as:
A. Metaplasia
B. Dysplasia (abnormal cell maturation, a pre-neoplastic change) [CORRECT]
C. Hypertrophy
D. Anaplasia
Correct Answer: B
Rationale: Dysplasia is abnormal, disordered cellular maturation characterized by pleomorphic cells with
enlarged, hyperchromatic nuclei, increased mitotic figures, and loss of normal architecture. Dysplasia is
reversible if the irritating stimulus is removed, but persistent dysplasia may progress to carcinoma in situ and
invasive cancer. D027-aligned verification: cervical dysplasia (CIN I-III) from HPV is the classic example;
anaplasia refers to lack of differentiation (malignant).
Q6: A patient experiences a myocardial infarction with cell death characterized by cell swelling,
mitochondrial damage, rupture of the plasma membrane, and an intense inflammatory response. This
pattern of cell death is BEST described as:
A. Apoptosis (programmed cell death, no inflammation)
B. Necrosis (pathologic cell death with inflammation and membrane rupture) [CORRECT]
C. Autophagy
D. Senescence
Correct Answer: B
Rationale: Necrosis is pathologic cell death characterized by cell swelling (oncosis), membrane rupture,
organelle breakdown, and an inflammatory response. Coagulative necrosis (most common) occurs in solid
organs (heart, kidney); liquefactive necrosis in the brain (and abscesses); caseous necrosis in TB; fat necrosis in
pancreatitis. D027-aligned verification: apoptosis is programmed cell death WITHOUT inflammation — the cell
shrinks, fragments into apoptotic bodies, and is phagocytosed without inflammatory response.
Q7: A patient develops acute tubular necrosis (ATN) after ischemic injury. The type of necrosis
MOST characteristic of this pattern is:
A. Coagulative necrosis (tissue architecture preserved for days) [CORRECT]
B. Liquefactive necrosis (tissue dissolves to liquid)
C. Caseous necrosis (cheese-like appearance)
D. Fat necrosis (calcification of adipose tissue)
Correct Answer: A
Rationale: Coagulative necrosis, the most common pattern, preserves tissue architecture for days after cell death
— characteristic of ischemic injury in solid organs (heart, kidney, spleen). Liquefactive necrosis is seen in brain
infarcts and bacterial abscesses (neutrophils digest tissue to liquid); caseous in TB and fungal infections
(cheese-like); fat necrosis in pancreatitis and breast trauma. D027-aligned verification: ATN affects renal
tubular cells with coagulative necrosis; gross proteinaceous casts (muddy brown casts) appear in urine.
Page 3
, WGU D027 Objective Assessment 2026/2027 | Verified Answers | 155 Questions
Q8: A patient with pulmonary tuberculosis has a granuloma with central amorphous, cheese-like
debris surrounded by macrophages and lymphocytes. This pattern of necrosis is:
A. Coagulative necrosis
B. Liquefactive necrosis
C. Caseous necrosis (cheese-like, classic for TB) [CORRECT]
D. Fat necrosis
Correct Answer: C
Rationale: Caseous necrosis ("cheesy" appearance) is a variant of coagulative necrosis encountered most often
in tuberculosis and fungal infections. The necrotic tissue appears as a granular, amorphous debris enclosed
within a granulomatous inflammatory border (granuloma). D027-aligned verification: caseous necrosis is
distinct from liquefactive (brain infarct) and fat (pancreatitis); its presence should trigger investigation for TB or
fungal disease.
Q9: A patient with acute pancreatitis develops fat necrosis in the peripancreatic tissue. The
mechanism of injury is:
A. Ischemia
B. Lipase digesting triglycerides to fatty acids that combine with calcium (saponification)
[CORRECT]
C. Hypoxia
D. Free radical injury
Correct Answer: B
Rationale: Fat necrosis occurs in acute pancreatitis when lipase escapes into peripancreatic tissue and digests
triglycerides into free fatty acids, which combine with calcium (saponification) forming chalky white deposits.
D027-aligned verification: similar fat necrosis can occur in breast tissue after trauma; lipase is also responsible
for the elevated serum lipase seen in pancreatitis. Calcification on imaging is a diagnostic clue.
Q10: A patient on long-term acetaminophen therapy develops hepatocyte injury. The primary
cellular mechanism of injury is:
A. Free radical-induced lipid peroxidation of cell membranes [CORRECT]
B. Hypoxic injury
C. Mechanical trauma
D. Osmotic stress
Correct Answer: A
Rationale: Acetaminophen at toxic doses produces the reactive metabolite NAPQI, which depletes glutathione
and causes free radical injury with lipid peroxidation of hepatocyte membranes, leading to massive hepatic
necrosis. D027-aligned verification: treatment is IV N-acetylcysteine (NAC, Mucomyst), a glutathione precursor,
given within 8-10 hours of ingestion. Free radical injury is a major mechanism in ischemia-reperfusion, drug
toxicity (acetaminophen, carbon tetrachloride), radiation, and aging.
Page 4
Verified Answers — Pathophysiology and Pharmacology
2026/2027 Edition | 155 Multiple-Choice Questions | 8 Sections | Aligned with WGU Course Competencies
Directions: Each question has four options (A–D). The correct option is marked [CORRECT] in accent color. A
detailed rationale follows each question, integrating pathophysiologic mechanisms and pharmacologic principles, with
verification notes against WGU D027 objective assessment competencies. Content spans cellular function and
adaptation, genetics and immunity, infection and acid-base, cardiovascular and hematologic, respiratory and renal,
neurologic and musculoskeletal, endocrine and gastrointestinal, and oncology with pharmacologic principles.
Distractors represent common pathophysiology and pharmacology misconceptions (e.g., confusing cellular adaptation
types, misidentifying disease mechanisms, confusing medication classifications, incorrect drug mechanism of action,
misapplying pharmacokinetic principles).
Section 1: Cellular Function, Injury, and Adaptation
Cell Structure, Injury Mechanisms, Necrosis, Apoptosis, Atrophy, Hypertrophy, Hyperplasia, Metaplasia, and Dysplasia
(Q1-Q15)
Q1: A patient with chronic hypertension develops increased cardiac muscle mass as the heart works
harder to pump against elevated afterload. This cellular adaptation is BEST described as:
A. Hyperplasia (increased cell number)
B. Hypertrophy (increased cell size) [CORRECT]
C. Metaplasia (cell type replacement)
D. Dysplasia (abnormal cell maturation)
Correct Answer: B
Rationale: Hypertrophy is an increase in CELL SIZE in response to increased workload or stress, classically
seen in cardiac muscle with chronic hypertension or skeletal muscle with exercise. Hyperplasia is increased cell
NUMBER (e.g., glandular tissue); metaplasia is replacement of one cell type with another (e.g., Barrett
esophagus); dysplasia is disordered cell maturation (pre-neoplastic). D027-aligned verification: cardiac and
skeletal muscle cells cannot divide (post-mitotic), so they adapt exclusively via hypertrophy.
Page 1
,WGU D027 Objective Assessment 2026/2027 | Verified Answers | 155 Questions
Q2: A 60-year-old patient with chronic GERD develops Barrett esophagus, in which normal
squamous epithelium is replaced by intestinal columnar epithelium. This adaptation is BEST
described as:
A. Hypertrophy
B. Hyperplasia
C. Metaplasia (reversible replacement of one adult cell type with another) [CORRECT]
D. Anaplasia
Correct Answer: C
Rationale: Metaplasia is the reversible replacement of one adult cell type with another, typically in response to
chronic irritation (e.g., Barrett esophagus from GERD, squamous metaplasia in the bronchi of smokers). The
metaplastic tissue is better able to withstand the irritation but has an increased risk of malignant transformation.
D027-aligned verification: metaplasia is reversible if the irritating stimulus is removed; if it persists, progression
to dysplasia and adenocarcinoma may occur.
Q3: A patient who sustained a stroke and has limited use of their left arm develops decreased muscle
mass in that limb. This cellular adaptation is BEST described as:
A. Atrophy (decrease in cell size due to decreased workload or disuse) [CORRECT]
B. Hypertrophy
C. Apoptosis
D. Necrosis
Correct Answer: A
Rationale: Atrophy is a decrease in cell size due to decreased workload, disuse, denervation, inadequate
nutrition, or decreased endocrine stimulation. Disuse atrophy occurs in immobilized limbs (e.g., post-stroke,
casting) and is generally reversible if the underlying cause is corrected. D027-aligned verification: hypertrophy
is increased cell size; apoptosis is programmed cell death; necrosis is pathologic cell death with inflammation.
Q4: A 25-year-old patient has the uterine lining thicken during the proliferative phase of the
menstrual cycle due to estrogen stimulation. This increase in cell NUMBER is BEST described as:
A. Hypertrophy
B. Hyperplasia ( hormonally-induced increase in cell number) [CORRECT]
C. Metaplasia
D. Dysplasia
Correct Answer: B
Rationale: Hyperplasia is an increase in cell NUMBER in response to hormonal stimulation or increased
functional demand. Physiologic hyperplasia occurs in the uterine endometrium during the menstrual cycle and in
breast tissue during pregnancy. D027-aligned verification: pathologic hyperplasia (e.g., endometrial
hyperplasia from unopposed estrogen) increases cancer risk. Hypertrophy (cell size increase) and hyperplasia
(cell number increase) often occur together in some tissues (e.g., uterus in pregnancy).
Page 2
,WGU D027 Objective Assessment 2026/2027 | Verified Answers | 155 Questions
Q5: A cervical biopsy in a 35-year-old woman shows disordered maturation of cells with enlarged,
irregular nuclei and increased mitotic figures. This cellular change is BEST described as:
A. Metaplasia
B. Dysplasia (abnormal cell maturation, a pre-neoplastic change) [CORRECT]
C. Hypertrophy
D. Anaplasia
Correct Answer: B
Rationale: Dysplasia is abnormal, disordered cellular maturation characterized by pleomorphic cells with
enlarged, hyperchromatic nuclei, increased mitotic figures, and loss of normal architecture. Dysplasia is
reversible if the irritating stimulus is removed, but persistent dysplasia may progress to carcinoma in situ and
invasive cancer. D027-aligned verification: cervical dysplasia (CIN I-III) from HPV is the classic example;
anaplasia refers to lack of differentiation (malignant).
Q6: A patient experiences a myocardial infarction with cell death characterized by cell swelling,
mitochondrial damage, rupture of the plasma membrane, and an intense inflammatory response. This
pattern of cell death is BEST described as:
A. Apoptosis (programmed cell death, no inflammation)
B. Necrosis (pathologic cell death with inflammation and membrane rupture) [CORRECT]
C. Autophagy
D. Senescence
Correct Answer: B
Rationale: Necrosis is pathologic cell death characterized by cell swelling (oncosis), membrane rupture,
organelle breakdown, and an inflammatory response. Coagulative necrosis (most common) occurs in solid
organs (heart, kidney); liquefactive necrosis in the brain (and abscesses); caseous necrosis in TB; fat necrosis in
pancreatitis. D027-aligned verification: apoptosis is programmed cell death WITHOUT inflammation — the cell
shrinks, fragments into apoptotic bodies, and is phagocytosed without inflammatory response.
Q7: A patient develops acute tubular necrosis (ATN) after ischemic injury. The type of necrosis
MOST characteristic of this pattern is:
A. Coagulative necrosis (tissue architecture preserved for days) [CORRECT]
B. Liquefactive necrosis (tissue dissolves to liquid)
C. Caseous necrosis (cheese-like appearance)
D. Fat necrosis (calcification of adipose tissue)
Correct Answer: A
Rationale: Coagulative necrosis, the most common pattern, preserves tissue architecture for days after cell death
— characteristic of ischemic injury in solid organs (heart, kidney, spleen). Liquefactive necrosis is seen in brain
infarcts and bacterial abscesses (neutrophils digest tissue to liquid); caseous in TB and fungal infections
(cheese-like); fat necrosis in pancreatitis and breast trauma. D027-aligned verification: ATN affects renal
tubular cells with coagulative necrosis; gross proteinaceous casts (muddy brown casts) appear in urine.
Page 3
, WGU D027 Objective Assessment 2026/2027 | Verified Answers | 155 Questions
Q8: A patient with pulmonary tuberculosis has a granuloma with central amorphous, cheese-like
debris surrounded by macrophages and lymphocytes. This pattern of necrosis is:
A. Coagulative necrosis
B. Liquefactive necrosis
C. Caseous necrosis (cheese-like, classic for TB) [CORRECT]
D. Fat necrosis
Correct Answer: C
Rationale: Caseous necrosis ("cheesy" appearance) is a variant of coagulative necrosis encountered most often
in tuberculosis and fungal infections. The necrotic tissue appears as a granular, amorphous debris enclosed
within a granulomatous inflammatory border (granuloma). D027-aligned verification: caseous necrosis is
distinct from liquefactive (brain infarct) and fat (pancreatitis); its presence should trigger investigation for TB or
fungal disease.
Q9: A patient with acute pancreatitis develops fat necrosis in the peripancreatic tissue. The
mechanism of injury is:
A. Ischemia
B. Lipase digesting triglycerides to fatty acids that combine with calcium (saponification)
[CORRECT]
C. Hypoxia
D. Free radical injury
Correct Answer: B
Rationale: Fat necrosis occurs in acute pancreatitis when lipase escapes into peripancreatic tissue and digests
triglycerides into free fatty acids, which combine with calcium (saponification) forming chalky white deposits.
D027-aligned verification: similar fat necrosis can occur in breast tissue after trauma; lipase is also responsible
for the elevated serum lipase seen in pancreatitis. Calcification on imaging is a diagnostic clue.
Q10: A patient on long-term acetaminophen therapy develops hepatocyte injury. The primary
cellular mechanism of injury is:
A. Free radical-induced lipid peroxidation of cell membranes [CORRECT]
B. Hypoxic injury
C. Mechanical trauma
D. Osmotic stress
Correct Answer: A
Rationale: Acetaminophen at toxic doses produces the reactive metabolite NAPQI, which depletes glutathione
and causes free radical injury with lipid peroxidation of hepatocyte membranes, leading to massive hepatic
necrosis. D027-aligned verification: treatment is IV N-acetylcysteine (NAC, Mucomyst), a glutathione precursor,
given within 8-10 hours of ingestion. Free radical injury is a major mechanism in ischemia-reperfusion, drug
toxicity (acetaminophen, carbon tetrachloride), radiation, and aging.
Page 4
