WGU D115 Advanced Pathophysiology
Exam (PDF) Questions and Ansẉers with
rationales 2026\2027 update
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Which cellular process is characterized by cell shrinkage, nuclear
condensation, and the formation of apoptotic bodies without
invoking an inflammatory response?
A) Necrosis
B) Apoptosis
C) Ischemia
D) Hydropic degeneration
Answer: B
Rationale: Apoptosis is programmed cell death. It is an active,
energy-dependent process that results in cell shrinkage and DNA
fragmentation without causing inflammation. Necrosis, conversely,
causes cell swelling and severe inflammation.
A 55-year-old male presents with severe crushing chest pain. Blood
tests reveal elevated cardiac troponins. This elevation is primarily
due to what cellular process?
A) Apoptosis
B) Karyolysis
C) Ischemic cell injury
D) Cellular adaptation
Answer: C
Rationale: Elevated troponins indicate myocardial cell death due to
ischemia. Ischemic injury depletes ATP, causing failure of the
sodium-potassium pump, cellular swelling, and eventual rupture of
the plasma membrane, releasing intracellular enzymes like troponin.
Dystrophic calcification occurs in which of the following
environments?
A) Hypercalcemic, normal tissue
B) Hypocalcemic, damaged tissue
C) Normocalcemic, damaged tissue
D) Hyperphosphatemic, normal tissue
,Answer: C
Rationale: Dystrophic calcification occurs in dying or dead tissues
despite normal serum calcium levels. Metastatic calcification,
conversely, occurs in normal tissues due to hypercalcemia or
hyperphosphatemia.
Which compensatory mechanism occurs exclusively in response to
increased workload or hormonal stimulation, resulting in an
increased size of cells?
A) Hyperplasia
B) Hypertrophy
C) Metaplasia
D) Dysplasia
Answer: B
Rationale: Hypertrophy is an increase in cell size. Hyperplasia is an
increase in cell number. In organs that cannot undergo mitosis (like
the heart), hypertrophy is the only mechanism for increasing organ
size.
A chronic smoker undergoes a bronchial biopsy. The normal
columnar ciliated epithelial cells have been replaced by stratified
squamous epithelial cells. This is an example of:
A) Dysplasia
B) Anaplasia
C) Metaplasia
D) Hyperplasia
Answer: C
Rationale: Metaplasia is the reversible replacement of one
differentiated cell type with another. In smokers, columnar cells are
replaced by squamous cells to better withstand the irritation,
though this results in a loss of ciliary clearance.
, What is the primary mechanism by which free radicals cause cellular
damage?
A) Inhibition of DNA synthesis
B) Lipid peroxidation of membranes
C) Activation of lysosomal enzymes
D) Depletion of intracellular calcium
Answer: B
Rationale: Free radicals are highly reactive species with unpaired
electrons. They cause cellular injury primarily through lipid
peroxidation of cell membranes, damaging membrane integrity and
leading to cell death.
Which phase of the cell cycle is characterized by DNA replication?
A) G1 phase
B) S phase
C) G2 phase
D) M phase
Answer: B
Rationale: The S (Synthesis) phase of the cell cycle is where DNA
replication occurs, doubling the genetic material before the cell
divides in the M (Mitotic) phase.
Liquefactive necrosis is most commonly observed in which tissue?
A) Heart
B) Kidney
C) Brain
D) Liver
Answer: C
Rationale: Liquefactive necrosis is characteristic of ischemic injury in
the brain. Because the brain is rich in lipids and has little connective
tissue, necrotic cells liquefy rapidly due to enzymatic degradation.
Exam (PDF) Questions and Ansẉers with
rationales 2026\2027 update
This Exam contains:
Guarantee passing score
Questions and Ansẉers
format set of multiple-choice
Expert-Verified rationales
Verified ẉith trusted textbooks
,───────────────────────────────────────────────────────
─
Which cellular process is characterized by cell shrinkage, nuclear
condensation, and the formation of apoptotic bodies without
invoking an inflammatory response?
A) Necrosis
B) Apoptosis
C) Ischemia
D) Hydropic degeneration
Answer: B
Rationale: Apoptosis is programmed cell death. It is an active,
energy-dependent process that results in cell shrinkage and DNA
fragmentation without causing inflammation. Necrosis, conversely,
causes cell swelling and severe inflammation.
A 55-year-old male presents with severe crushing chest pain. Blood
tests reveal elevated cardiac troponins. This elevation is primarily
due to what cellular process?
A) Apoptosis
B) Karyolysis
C) Ischemic cell injury
D) Cellular adaptation
Answer: C
Rationale: Elevated troponins indicate myocardial cell death due to
ischemia. Ischemic injury depletes ATP, causing failure of the
sodium-potassium pump, cellular swelling, and eventual rupture of
the plasma membrane, releasing intracellular enzymes like troponin.
Dystrophic calcification occurs in which of the following
environments?
A) Hypercalcemic, normal tissue
B) Hypocalcemic, damaged tissue
C) Normocalcemic, damaged tissue
D) Hyperphosphatemic, normal tissue
,Answer: C
Rationale: Dystrophic calcification occurs in dying or dead tissues
despite normal serum calcium levels. Metastatic calcification,
conversely, occurs in normal tissues due to hypercalcemia or
hyperphosphatemia.
Which compensatory mechanism occurs exclusively in response to
increased workload or hormonal stimulation, resulting in an
increased size of cells?
A) Hyperplasia
B) Hypertrophy
C) Metaplasia
D) Dysplasia
Answer: B
Rationale: Hypertrophy is an increase in cell size. Hyperplasia is an
increase in cell number. In organs that cannot undergo mitosis (like
the heart), hypertrophy is the only mechanism for increasing organ
size.
A chronic smoker undergoes a bronchial biopsy. The normal
columnar ciliated epithelial cells have been replaced by stratified
squamous epithelial cells. This is an example of:
A) Dysplasia
B) Anaplasia
C) Metaplasia
D) Hyperplasia
Answer: C
Rationale: Metaplasia is the reversible replacement of one
differentiated cell type with another. In smokers, columnar cells are
replaced by squamous cells to better withstand the irritation,
though this results in a loss of ciliary clearance.
, What is the primary mechanism by which free radicals cause cellular
damage?
A) Inhibition of DNA synthesis
B) Lipid peroxidation of membranes
C) Activation of lysosomal enzymes
D) Depletion of intracellular calcium
Answer: B
Rationale: Free radicals are highly reactive species with unpaired
electrons. They cause cellular injury primarily through lipid
peroxidation of cell membranes, damaging membrane integrity and
leading to cell death.
Which phase of the cell cycle is characterized by DNA replication?
A) G1 phase
B) S phase
C) G2 phase
D) M phase
Answer: B
Rationale: The S (Synthesis) phase of the cell cycle is where DNA
replication occurs, doubling the genetic material before the cell
divides in the M (Mitotic) phase.
Liquefactive necrosis is most commonly observed in which tissue?
A) Heart
B) Kidney
C) Brain
D) Liver
Answer: C
Rationale: Liquefactive necrosis is characteristic of ischemic injury in
the brain. Because the brain is rich in lipids and has little connective
tissue, necrotic cells liquefy rapidly due to enzymatic degradation.
