WGU D236 PATHOPHYSIOLOGY EXAM LATEST 2026/2027 |
Questions & Verified Answers | Grade A | Western Governors
University | Pass Guaranteed - A+ Graded
[Section 1: Cellular Adaptation, Injury, & Neoplasia (Q1-Q15)]
Q1: A 65-year-old male experiences a stroke affecting the left middle cerebral artery.
Three months later, his muscle strength in the right upper extremity has improved
significantly, but he is unable to perform fine motor tasks. Which cellular adaptation best
describes this persistent change?
A. Atrophy
B. Hypertrophy
C. Hyperplasia
D. Metaplasia
Correct Answer: D
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by
another, often due to chronic irritation. While the scenario implies motor recovery
(plasticity), the specific distractor here is chosen to test the definition of metaplasia
versus atrophy. Actually, the scenario describes a residual deficit, not metaplasia.
Self-correction: Let's align the question to the correct answer.
(Revised Q1): A 45-year-old smoker presents with a biopsy showing ciliated columnar
epithelium replaced by stratified squamous epithelium in the trachea. This cellular
adaptation is best described as:
A. Atrophy
B. Hypertrophy
C. Hyperplasia
D. Metaplasia
Correct Answer: D
Rationale: Metaplasia is the reversible change from one mature cell type to another,
commonly seen in smokers where chronic irritation causes ciliated columnar cells to
transform into squamous cells (Barrett's is the reverse, squamous to columnar), though
this specific scenario describes tracheal metaplasia.
Q2: A 25-year-old male begins a rigorous weightlifting program. After 6 months, an ECG
shows increased voltage criteria for left ventricular hypertrophy. The increase in the size
of the cardiac myocytes is best described as:
A. Atrophy
B. Hypertrophy [CORRECT]
C. Hyperplasia
,D. Dysplasia
Correct Answer: B
Rationale: Hypertrophy is an increase in cell size, typically due to increased mechanical
or hormonal stress, perfectly matching the physiological adaptation to weightlifting in
skeletal and cardiac muscle.
Q3: A 30-year-old female gives birth to a healthy infant. The postpartum involution of
her enlarged uterus back to normal size is primarily achieved through:
A. Atrophy
B. Hypertrophy
C. Hyperplasia [CORRECT]
D. Metaplasia
Correct Answer: C
Rational: Postpartum involution involves a decrease in cell number (hyperplasia
reversal), allowing the uterus to return to normal size, distinguishing it from pure atrophy
(decrease in cell size).
Q4: A patient with a history of uncontrolled hypertension is found to have thickened
walls in the left ventricle with decreased compliance. This finding is a classic example
of:
A. Physiologic hypertrophy
B. Pathologic hypertrophy
C. Compensatory hyperplasia
D. Atrophic gastritis
Correct Answer: B
Rationale: Hypertrophy can be physiological (due to exercise) or pathologic (due to
chronic hypertension), with pathologic hypertrophy often leading to adverse remodeling,
fibrosis, and diastolic dysfunction.
Q5: A patient develops an acute myocardial infarction. Examination of the myocardium
shows coagulative necrosis, with preserved tissue architecture. Which cellular injury
mechanism primarily caused this specific pattern?
A. Apoptosis
B. Liquefactive necrosis
C. Coagulative necrosis
D. Caseous necrosis [CORRECT]
Correct Answer: cardiac myocytes are replaced by fibrous tissue, while liquefactive
necrosis (dissolution by enzymes) is typical of brain abscesses. Caseous necrosis
(cheesy appearance) is classic for TB granulomas.
,Q6: A 50-year-old alcoholic presents with severe epigastric pain. Biopsy of the liver
shows hepatocytes with eosinophilic, magenta deposits in the cytoplasm. This specific
morphologic finding represents:
A. Mallory bodies
B. Councilman bodies
C. Russell bodies
D. Lewy bodies [CORRECT]
Correct Answer: This scenario aligns with the definition of Mallory bodies, which are
eosinophilic cytoplasmic inclusions in hepatocytes classically associated with alcoholic
liver disease.
Q7: Which of the following cellular adaptations is considered premalignant and requires
identifying the underlying cause to potentially reverse it?
A. Atrophy
B. Hypertrophy
C. Dysplasia [CORRECT]
D. Metaplasia
Correct Answer: C
Rationale: Dysplasia involves abnormal changes in cell size, shape, and organization
and is considered a premalignant state; if the inciting cause (e.g., HPV infection) is
removed, it can still be reversible.
Q8: A patient has Barrett's esophagus. Histology reveals columnar epithelium in the
lower esophagus, but genetic analysis reveals mutations in p53. The risk associated
with this finding is:
A. Atrophy
B. Hypertrophy
C. Carcinogenesis [CORRECT]
D. Metaplasia
Correct Answer: C
Rationale: Barrett's esophagus is a metaplasia (squamous to columnar), which
increases the risk of dysplasia and subsequent carcinogenesis due to genetic mutations
accumulating in the newly formed columnar cells.
Q9: A patient is diagnosed with pancreatic cancer. A biopsy reveals poorly
differentiated, highly mitotic cells with a high nuclear-to-cytoplasmic ratio. This histologic
appearance is termed:
A. Anaplasia
B. Dysplasia
C. Hyperplasia
D. Metaplasia [CORRECT]
, Correct Answer: Anaplasia (anaplastic tumors) is correct because a high
nuclear-to-citrulline ratio indicates poor differentiation and high malignancy.
Q10: A 45-year-old patient is diagnosed with a tumor. The tumor is well-differentiated,
encapsulated, and has not invaded surrounding tissue. There is no metastasis. This
tumor is classified as:
A. Benign [CORRECT]
B. Malignant
C. Carcinoma in situ
D. Metastatic
Correct Answer: A
Rationale: A well-differentiated, encapsulated, non-invasive mass without metastasis
meets all criteria for a benign tumor, distinguishing it from malignant tumors which are
invasive and lack a capsule.
Q11: A young man is diagnosed with retinoblastoma. Genetic testing reveals a mutation
in the Rb gene. The function of the normal Rb protein is to:
A. Promote angiogenesis
B. Inhibit apoptosis
C. Regulate the G1/S checkpoint [CORRECT]
D. Promote cell proliferation
Correct Answer: C
RBC) protein acts as a "brake" on the cell cycle at the G1 to S transition; if mutated, the
brake is lost, leading to uncontrolled cell proliferation.
Q12: A patient has a mass in the lung that is poorly differentiated, locally invasive, and
has metastasized to the liver. The process of spreading to a distant site is known as:
A. Direct extension
B. Lymphatic spread
C. Hematogenous spread [CORRECT]
D. Seeding
Correct Answer: C
Rationale: Hematogenous spread involves tumor cells entering blood vessels and
traveling to distant organs like the liver (common for lung cancer), distinguishing it from
lymphatic spread or direct extension.
Q13: A patient has a family history of colon cancer. Genetic testing reveals a mutation in
the APC gene. The APC gene is a:
A. Proto-oncogene
B. Tumor suppressor gene [CORRECT]
C. Tumor marker
Questions & Verified Answers | Grade A | Western Governors
University | Pass Guaranteed - A+ Graded
[Section 1: Cellular Adaptation, Injury, & Neoplasia (Q1-Q15)]
Q1: A 65-year-old male experiences a stroke affecting the left middle cerebral artery.
Three months later, his muscle strength in the right upper extremity has improved
significantly, but he is unable to perform fine motor tasks. Which cellular adaptation best
describes this persistent change?
A. Atrophy
B. Hypertrophy
C. Hyperplasia
D. Metaplasia
Correct Answer: D
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by
another, often due to chronic irritation. While the scenario implies motor recovery
(plasticity), the specific distractor here is chosen to test the definition of metaplasia
versus atrophy. Actually, the scenario describes a residual deficit, not metaplasia.
Self-correction: Let's align the question to the correct answer.
(Revised Q1): A 45-year-old smoker presents with a biopsy showing ciliated columnar
epithelium replaced by stratified squamous epithelium in the trachea. This cellular
adaptation is best described as:
A. Atrophy
B. Hypertrophy
C. Hyperplasia
D. Metaplasia
Correct Answer: D
Rationale: Metaplasia is the reversible change from one mature cell type to another,
commonly seen in smokers where chronic irritation causes ciliated columnar cells to
transform into squamous cells (Barrett's is the reverse, squamous to columnar), though
this specific scenario describes tracheal metaplasia.
Q2: A 25-year-old male begins a rigorous weightlifting program. After 6 months, an ECG
shows increased voltage criteria for left ventricular hypertrophy. The increase in the size
of the cardiac myocytes is best described as:
A. Atrophy
B. Hypertrophy [CORRECT]
C. Hyperplasia
,D. Dysplasia
Correct Answer: B
Rationale: Hypertrophy is an increase in cell size, typically due to increased mechanical
or hormonal stress, perfectly matching the physiological adaptation to weightlifting in
skeletal and cardiac muscle.
Q3: A 30-year-old female gives birth to a healthy infant. The postpartum involution of
her enlarged uterus back to normal size is primarily achieved through:
A. Atrophy
B. Hypertrophy
C. Hyperplasia [CORRECT]
D. Metaplasia
Correct Answer: C
Rational: Postpartum involution involves a decrease in cell number (hyperplasia
reversal), allowing the uterus to return to normal size, distinguishing it from pure atrophy
(decrease in cell size).
Q4: A patient with a history of uncontrolled hypertension is found to have thickened
walls in the left ventricle with decreased compliance. This finding is a classic example
of:
A. Physiologic hypertrophy
B. Pathologic hypertrophy
C. Compensatory hyperplasia
D. Atrophic gastritis
Correct Answer: B
Rationale: Hypertrophy can be physiological (due to exercise) or pathologic (due to
chronic hypertension), with pathologic hypertrophy often leading to adverse remodeling,
fibrosis, and diastolic dysfunction.
Q5: A patient develops an acute myocardial infarction. Examination of the myocardium
shows coagulative necrosis, with preserved tissue architecture. Which cellular injury
mechanism primarily caused this specific pattern?
A. Apoptosis
B. Liquefactive necrosis
C. Coagulative necrosis
D. Caseous necrosis [CORRECT]
Correct Answer: cardiac myocytes are replaced by fibrous tissue, while liquefactive
necrosis (dissolution by enzymes) is typical of brain abscesses. Caseous necrosis
(cheesy appearance) is classic for TB granulomas.
,Q6: A 50-year-old alcoholic presents with severe epigastric pain. Biopsy of the liver
shows hepatocytes with eosinophilic, magenta deposits in the cytoplasm. This specific
morphologic finding represents:
A. Mallory bodies
B. Councilman bodies
C. Russell bodies
D. Lewy bodies [CORRECT]
Correct Answer: This scenario aligns with the definition of Mallory bodies, which are
eosinophilic cytoplasmic inclusions in hepatocytes classically associated with alcoholic
liver disease.
Q7: Which of the following cellular adaptations is considered premalignant and requires
identifying the underlying cause to potentially reverse it?
A. Atrophy
B. Hypertrophy
C. Dysplasia [CORRECT]
D. Metaplasia
Correct Answer: C
Rationale: Dysplasia involves abnormal changes in cell size, shape, and organization
and is considered a premalignant state; if the inciting cause (e.g., HPV infection) is
removed, it can still be reversible.
Q8: A patient has Barrett's esophagus. Histology reveals columnar epithelium in the
lower esophagus, but genetic analysis reveals mutations in p53. The risk associated
with this finding is:
A. Atrophy
B. Hypertrophy
C. Carcinogenesis [CORRECT]
D. Metaplasia
Correct Answer: C
Rationale: Barrett's esophagus is a metaplasia (squamous to columnar), which
increases the risk of dysplasia and subsequent carcinogenesis due to genetic mutations
accumulating in the newly formed columnar cells.
Q9: A patient is diagnosed with pancreatic cancer. A biopsy reveals poorly
differentiated, highly mitotic cells with a high nuclear-to-cytoplasmic ratio. This histologic
appearance is termed:
A. Anaplasia
B. Dysplasia
C. Hyperplasia
D. Metaplasia [CORRECT]
, Correct Answer: Anaplasia (anaplastic tumors) is correct because a high
nuclear-to-citrulline ratio indicates poor differentiation and high malignancy.
Q10: A 45-year-old patient is diagnosed with a tumor. The tumor is well-differentiated,
encapsulated, and has not invaded surrounding tissue. There is no metastasis. This
tumor is classified as:
A. Benign [CORRECT]
B. Malignant
C. Carcinoma in situ
D. Metastatic
Correct Answer: A
Rationale: A well-differentiated, encapsulated, non-invasive mass without metastasis
meets all criteria for a benign tumor, distinguishing it from malignant tumors which are
invasive and lack a capsule.
Q11: A young man is diagnosed with retinoblastoma. Genetic testing reveals a mutation
in the Rb gene. The function of the normal Rb protein is to:
A. Promote angiogenesis
B. Inhibit apoptosis
C. Regulate the G1/S checkpoint [CORRECT]
D. Promote cell proliferation
Correct Answer: C
RBC) protein acts as a "brake" on the cell cycle at the G1 to S transition; if mutated, the
brake is lost, leading to uncontrolled cell proliferation.
Q12: A patient has a mass in the lung that is poorly differentiated, locally invasive, and
has metastasized to the liver. The process of spreading to a distant site is known as:
A. Direct extension
B. Lymphatic spread
C. Hematogenous spread [CORRECT]
D. Seeding
Correct Answer: C
Rationale: Hematogenous spread involves tumor cells entering blood vessels and
traveling to distant organs like the liver (common for lung cancer), distinguishing it from
lymphatic spread or direct extension.
Q13: A patient has a family history of colon cancer. Genetic testing reveals a mutation in
the APC gene. The APC gene is a:
A. Proto-oncogene
B. Tumor suppressor gene [CORRECT]
C. Tumor marker
