1
WGU D115 Advanced Pathophysiology OA Exam with
Test Bank Actual Exam 2026/2027 – Complete Exam-
Style Questions with Detailed Rationales | Pass
Guaranteed – A+ Graded
[SECTION 1: Cellular & Genetic Pathophysiology — Questions 1-10]
Q1: A 45-year-old male patient presents with calf pain during exercise that subsides with rest
(claudication). An examination reveals significant enlargement of the muscle cells in the affected
arteries due to increased workload. Which type of cellular adaptation is most likely occurring?
A. Atrophy
C. Hypertrophy
D. Hyperplasia
Correct Answer: C
Rationale: Hypertrophy refers to an increase in the size of individual cells, resulting in an
increase in the size of the tissue or organ. In this scenario, the vascular smooth muscle cells
increase in size to accommodate the increased resistance and workload, likely due to
atherosclerosis. Atrophy (A) is a decrease in size. Hyperplasia (D) is an increase in the number of
cells.
Q2: A patient suffering from a myocardial infarction (MI) has a region of cardiac muscle that is
permanently damaged and has undergone cell death. Upon biopsy, the tissue appears swollen and
lysed, with intact nuclei initially dissolving. Which type of cellular injury is most consistent with
this description?
A. Coagulative necrosis
B. Liquefactive necrosis
C. Caseous necrosis
D. Fat necrosis
Correct Answer: A
,2
Rationale: Coagulative necrosis is the most common type of necrosis caused by ischemia or
hypoxia in all tissues except the brain. It is characterized by the preservation of the basic
structural outline of the coagulated protein (cell ghost) and the swelling of organelles before their
dissolution. Liquefactive necrosis (B) is typical of the brain.
Q3: A 30-year-old female with a history of heavy smoking presents with a chronic cough. A
biopsy of the tracheal epithelium reveals that the ciliated columnar cells have been replaced by
stratified squamous epithelium. Which cellular adaptation is this?
A. Hyperplasia
B. Dysplasia
C. Metaplasia
D. Anaplasia
Correct Answer: C
Rationale: Metaplasia is the reversible replacement of one differentiated cell type with another
mature differentiated cell type. In response to chronic irritation (smoking), the ciliated cells are
replaced by tougher squamous cells to withstand stress. Dysplasia (B) refers to disordered
cellular growth and is often a precancerous change, not just a replacement.
Q4: A researcher is studying a genetic disorder where an individual needs only one mutated
allele from one parent to express the disease phenotype. Which pattern of inheritance does this
represent?
A. Autosomal Recessive
B. Autosomal Dominant
C. X-linked Recessive
D. Mitochondrial
Correct Answer: B
Rationale: Autosomal dominant inheritance requires only one copy of the mutated gene (from
either parent) for the individual to be affected. Examples include Huntington's disease and
,3
Marfan syndrome. Autosomal recessive (A) requires two copies, and X-linked (C) involves the
sex chromosomes.
Q5: A newborn infant is diagnosed with a genetic disorder characterized by the presence of an
extra chromosome 21. This condition is a type of chromosomal abnormality known as:
A. Monosomy
B. Trisomy
C. Translocation
D. Deletion
Correct Answer: B
Rationale: Trisomy is a chromosomal abnormality where a specific chromosome is present in
three copies instead of the usual two. Trisomy 21 is the genetic basis for Down syndrome.
Monosomy (A) is the loss of a chromosome.
Q6: A patient has a benign tumor composed of mature fat cells (lipoma). Pathology reports the
growth as disorganized but composed of well-differentiated cells. What is the correct
terminology for this neoplasm?
A. Anaplastic
B. Malignant
C. Benign
D. Metastatic
Correct Answer: C
Rationale: A benign neoplasm (tumor) is characterized by well-differentiated cells that closely
resemble the tissue of origin, grow slowly, and do not spread (metastasize). Anaplastic (A) and
malignant (B) imply cancerous, poorly differentiated growth.
, 4
Q7: A patient with severe hypovolemic shock presents to the emergency department. The
mechanism of cellular injury is primarily due to the cessation of oxidative phosphorylation,
leading to a failure of what cellular pump?
A. Sodium-Potassium (Na+/K+-ATPase) pump
B. Calcium (Ca2+) pump
C. Proton (H+) pump
D. Magnesium (Mg2+) pump
Correct Answer: A
Rationale: Hypoxia leads to ATP depletion. Without ATP, the Na+/K+ pump fails, allowing
sodium to accumulate inside the cell and water to follow (osmotic swelling), leading to cellular
injury and death. While calcium pumps (B) also fail, the immediate osmotic crisis is driven by
the Na+ influx.
Q8: A 5-year-old child presents with chronic infections and is found to have a defect in the
ability to generate B cells (humoral immunity). Which of the following would be absent in this
child?
A. Cytotoxic T cells
C. Antibodies
D. Natural Killer cells
Correct Answer: C
Rationale: B cells are responsible for humoral immunity and the production of antibodies
(immunoglobulins). A defect in B cells would result in low antibody levels, whereas T cells (A
and D) are responsible for cell-mediated immunity.
Q9: A patient with long-standing uncontrolled hypertension exhibits an increase in the size of the
left ventricle wall to pump against the increased resistance. This is an example of:
A. Compensatory hypertrophy
B. Pathologic atrophy
WGU D115 Advanced Pathophysiology OA Exam with
Test Bank Actual Exam 2026/2027 – Complete Exam-
Style Questions with Detailed Rationales | Pass
Guaranteed – A+ Graded
[SECTION 1: Cellular & Genetic Pathophysiology — Questions 1-10]
Q1: A 45-year-old male patient presents with calf pain during exercise that subsides with rest
(claudication). An examination reveals significant enlargement of the muscle cells in the affected
arteries due to increased workload. Which type of cellular adaptation is most likely occurring?
A. Atrophy
C. Hypertrophy
D. Hyperplasia
Correct Answer: C
Rationale: Hypertrophy refers to an increase in the size of individual cells, resulting in an
increase in the size of the tissue or organ. In this scenario, the vascular smooth muscle cells
increase in size to accommodate the increased resistance and workload, likely due to
atherosclerosis. Atrophy (A) is a decrease in size. Hyperplasia (D) is an increase in the number of
cells.
Q2: A patient suffering from a myocardial infarction (MI) has a region of cardiac muscle that is
permanently damaged and has undergone cell death. Upon biopsy, the tissue appears swollen and
lysed, with intact nuclei initially dissolving. Which type of cellular injury is most consistent with
this description?
A. Coagulative necrosis
B. Liquefactive necrosis
C. Caseous necrosis
D. Fat necrosis
Correct Answer: A
,2
Rationale: Coagulative necrosis is the most common type of necrosis caused by ischemia or
hypoxia in all tissues except the brain. It is characterized by the preservation of the basic
structural outline of the coagulated protein (cell ghost) and the swelling of organelles before their
dissolution. Liquefactive necrosis (B) is typical of the brain.
Q3: A 30-year-old female with a history of heavy smoking presents with a chronic cough. A
biopsy of the tracheal epithelium reveals that the ciliated columnar cells have been replaced by
stratified squamous epithelium. Which cellular adaptation is this?
A. Hyperplasia
B. Dysplasia
C. Metaplasia
D. Anaplasia
Correct Answer: C
Rationale: Metaplasia is the reversible replacement of one differentiated cell type with another
mature differentiated cell type. In response to chronic irritation (smoking), the ciliated cells are
replaced by tougher squamous cells to withstand stress. Dysplasia (B) refers to disordered
cellular growth and is often a precancerous change, not just a replacement.
Q4: A researcher is studying a genetic disorder where an individual needs only one mutated
allele from one parent to express the disease phenotype. Which pattern of inheritance does this
represent?
A. Autosomal Recessive
B. Autosomal Dominant
C. X-linked Recessive
D. Mitochondrial
Correct Answer: B
Rationale: Autosomal dominant inheritance requires only one copy of the mutated gene (from
either parent) for the individual to be affected. Examples include Huntington's disease and
,3
Marfan syndrome. Autosomal recessive (A) requires two copies, and X-linked (C) involves the
sex chromosomes.
Q5: A newborn infant is diagnosed with a genetic disorder characterized by the presence of an
extra chromosome 21. This condition is a type of chromosomal abnormality known as:
A. Monosomy
B. Trisomy
C. Translocation
D. Deletion
Correct Answer: B
Rationale: Trisomy is a chromosomal abnormality where a specific chromosome is present in
three copies instead of the usual two. Trisomy 21 is the genetic basis for Down syndrome.
Monosomy (A) is the loss of a chromosome.
Q6: A patient has a benign tumor composed of mature fat cells (lipoma). Pathology reports the
growth as disorganized but composed of well-differentiated cells. What is the correct
terminology for this neoplasm?
A. Anaplastic
B. Malignant
C. Benign
D. Metastatic
Correct Answer: C
Rationale: A benign neoplasm (tumor) is characterized by well-differentiated cells that closely
resemble the tissue of origin, grow slowly, and do not spread (metastasize). Anaplastic (A) and
malignant (B) imply cancerous, poorly differentiated growth.
, 4
Q7: A patient with severe hypovolemic shock presents to the emergency department. The
mechanism of cellular injury is primarily due to the cessation of oxidative phosphorylation,
leading to a failure of what cellular pump?
A. Sodium-Potassium (Na+/K+-ATPase) pump
B. Calcium (Ca2+) pump
C. Proton (H+) pump
D. Magnesium (Mg2+) pump
Correct Answer: A
Rationale: Hypoxia leads to ATP depletion. Without ATP, the Na+/K+ pump fails, allowing
sodium to accumulate inside the cell and water to follow (osmotic swelling), leading to cellular
injury and death. While calcium pumps (B) also fail, the immediate osmotic crisis is driven by
the Na+ influx.
Q8: A 5-year-old child presents with chronic infections and is found to have a defect in the
ability to generate B cells (humoral immunity). Which of the following would be absent in this
child?
A. Cytotoxic T cells
C. Antibodies
D. Natural Killer cells
Correct Answer: C
Rationale: B cells are responsible for humoral immunity and the production of antibodies
(immunoglobulins). A defect in B cells would result in low antibody levels, whereas T cells (A
and D) are responsible for cell-mediated immunity.
Q9: A patient with long-standing uncontrolled hypertension exhibits an increase in the size of the
left ventricle wall to pump against the increased resistance. This is an example of:
A. Compensatory hypertrophy
B. Pathologic atrophy
