WGU D236 pathophysiology: Objective Assessment
Questions and Verified Answers | Latest GRADED A+
1|Page
,WGU D236 Pathophysiology: Objective Assessment Questions and Verified Answers | Latest
GRADED A+
2026/2027 Examination
Total Questions: 200
Instructions:
• Answer all questions.
• Select the single best answer.
• Each question has four answer choices: A, B, C, and D.
• Select only ONE answer for each question.
SECTION 1: Cellular Function, Adaptation, Injury, and Homeostasis
Questions 1–25
Q1. A client with a history of chronic hypertension develops left ventricular enlargement. The
nurse understands this adaptation occurs because cardiac muscle cells:
A. Increase in number through mitotic division
B. Increase in size to meet elevated workload demands
C. Undergo metaplastic transformation to skeletal muscle
D. Reduce metabolic activity to conserve energy
Correct Answer: B. Increase in size to meet elevated workload demands
Rationale: Hypertrophy is an increase in cell size, commonly seen in cardiac muscle in response
to chronic pressure overload. Cardiac myocytes are terminally differentiated and cannot divide
(ruling out hyperplasia). Metaplasia involves replacement of one cell type with another, which does
not occur in cardiac muscle. Atrophy would represent decreased cell size, which is not the adaptive
response to increased workload.
Q2. During a period of prolonged starvation, a client's skeletal muscle mass decreases
significantly. The nurse identifies this as:
A. Hyperplasia
B. Hypertrophy
C. Atrophy
D. Dysplasia
Correct Answer: C. Atrophy
Rationale: Atrophy is the reduction in cell size and metabolic activity due to decreased workload,
nutrient supply, or hormonal stimulation. In starvation, muscle cells decrease in size to conserve
energy and amino acids. Hyperplasia refers to increased cell number, hypertrophy to increased cell
size, and dysplasia to disordered growth—none of which describe the muscle wasting of starvation.
2|Page
, Q3. A biopsy of the lower esophagus in a client with chronic GERD reveals replacement of
squamous epithelium with columnar epithelium. This adaptation is:
A. Dysplasia
B. Metaplasia
C. Anaplasia
D. Neoplasia
Correct Answer: B. Metaplasia
Rationale: Metaplasia is the reversible replacement of one differentiated cell type with another
better suited to withstand stress. In chronic GERD, squamous epithelium is replaced by columnar
epithelium (Barrett's esophagus). Dysplasia involves disordered growth and loss of uniformity,
anaplasia is a hallmark of malignancy with undifferentiated cells, and neoplasia refers to new
uncontrolled growth.
Q4. Which cellular change is considered irreversible and most directly associated with malignant
transformation?
A. Atrophy
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Correct Answer: D. Dysplasia
Rationale: Dysplasia is characterized by disordered cellular growth with variations in size, shape,
and organization. While not always irreversible, severe dysplasia is a strong precursor to malignancy.
Atrophy, hypertrophy, and metaplasia are adaptive responses that can typically reverse when the
stressor is removed, though metaplasia can progress to dysplasia.
Q5. A client experiencing ischemia to the kidney would most likely demonstrate which type of
necrosis?
A. Liquefactive necrosis
B. Caseous necrosis
C. Coagulative necrosis
D. Fat necrosis
Correct Answer: C. Coagulative necrosis
Rationale: Coagulative necrosis is characteristic of ischemic injury in most organs, including the
kidney, heart, and spleen. The structural framework of the tissue remains visible for days after cell
death due to protein denaturation. Liquefactive necrosis occurs primarily in the brain and in
abscesses, caseous necrosis is associated with tuberculosis, and fat necrosis occurs in pancreatic
injury or breast trauma.
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, Q6. A client dies from a brain infarct. The area of necrosis in the brain is best described as:
A. Coagulative necrosis
B. Liquefactive necrosis
C. Caseous necrosis
D. Fibrinoid necrosis
Correct Answer: B. Liquefactive necrosis
Rationale: Liquefactive necrosis occurs in the brain because the tissue lacks substantial structural
framework and enzymatic digestion rapidly transforms dead cells into a soft, liquefied mass.
Coagulative necrosis characterizes ischemic injury in most other organs. Caseous necrosis is seen in
tuberculosis, and fibrinoid necrosis occurs in blood vessel walls in immune-mediated injury.
Q7. During apoptosis, which cellular event distinguishes this process from necrosis?
A. Cell swelling with membrane rupture
B. Release of intracellular contents triggering inflammation
C. Organized DNA fragmentation without inflammation
D. Random enzymatic digestion of cellular components
Correct Answer: C. Organized DNA fragmentation without inflammation
Rationale: Apoptosis is programmed cell death characterized by cell shrinkage, chromatin
condensation, organized DNA fragmentation, and formation of apoptotic bodies that are
phagocytosed without triggering inflammation. In contrast, necrosis involves cellular swelling,
membrane rupture, release of intracellular contents, and a significant inflammatory response.
Q8. Which mechanism is primarily responsible for reperfusion injury following an ischemic
event?
A. Restoration of normal pH
B. Generation of reactive oxygen species
C. Decreased intracellular calcium
D. Suppression of immune mediators
Correct Answer: B. Generation of reactive oxygen species
Rationale: Reperfusion injury occurs when blood supply returns to ischemic tissue, paradoxically
causing additional damage through reactive oxygen species (ROS) such as superoxide and hydroxyl
radicals. These molecules cause oxidative damage to membranes, proteins, and DNA. Restoration of
oxygen promotes ROS formation through mitochondrial dysfunction and xanthine oxidase activation.
Q9. A client presents with severe hypocalcemia. Which clinical sign would the nurse expect to
assess?
A. Trousseau's sign
B. Babinski sign
4|Page
Questions and Verified Answers | Latest GRADED A+
1|Page
,WGU D236 Pathophysiology: Objective Assessment Questions and Verified Answers | Latest
GRADED A+
2026/2027 Examination
Total Questions: 200
Instructions:
• Answer all questions.
• Select the single best answer.
• Each question has four answer choices: A, B, C, and D.
• Select only ONE answer for each question.
SECTION 1: Cellular Function, Adaptation, Injury, and Homeostasis
Questions 1–25
Q1. A client with a history of chronic hypertension develops left ventricular enlargement. The
nurse understands this adaptation occurs because cardiac muscle cells:
A. Increase in number through mitotic division
B. Increase in size to meet elevated workload demands
C. Undergo metaplastic transformation to skeletal muscle
D. Reduce metabolic activity to conserve energy
Correct Answer: B. Increase in size to meet elevated workload demands
Rationale: Hypertrophy is an increase in cell size, commonly seen in cardiac muscle in response
to chronic pressure overload. Cardiac myocytes are terminally differentiated and cannot divide
(ruling out hyperplasia). Metaplasia involves replacement of one cell type with another, which does
not occur in cardiac muscle. Atrophy would represent decreased cell size, which is not the adaptive
response to increased workload.
Q2. During a period of prolonged starvation, a client's skeletal muscle mass decreases
significantly. The nurse identifies this as:
A. Hyperplasia
B. Hypertrophy
C. Atrophy
D. Dysplasia
Correct Answer: C. Atrophy
Rationale: Atrophy is the reduction in cell size and metabolic activity due to decreased workload,
nutrient supply, or hormonal stimulation. In starvation, muscle cells decrease in size to conserve
energy and amino acids. Hyperplasia refers to increased cell number, hypertrophy to increased cell
size, and dysplasia to disordered growth—none of which describe the muscle wasting of starvation.
2|Page
, Q3. A biopsy of the lower esophagus in a client with chronic GERD reveals replacement of
squamous epithelium with columnar epithelium. This adaptation is:
A. Dysplasia
B. Metaplasia
C. Anaplasia
D. Neoplasia
Correct Answer: B. Metaplasia
Rationale: Metaplasia is the reversible replacement of one differentiated cell type with another
better suited to withstand stress. In chronic GERD, squamous epithelium is replaced by columnar
epithelium (Barrett's esophagus). Dysplasia involves disordered growth and loss of uniformity,
anaplasia is a hallmark of malignancy with undifferentiated cells, and neoplasia refers to new
uncontrolled growth.
Q4. Which cellular change is considered irreversible and most directly associated with malignant
transformation?
A. Atrophy
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Correct Answer: D. Dysplasia
Rationale: Dysplasia is characterized by disordered cellular growth with variations in size, shape,
and organization. While not always irreversible, severe dysplasia is a strong precursor to malignancy.
Atrophy, hypertrophy, and metaplasia are adaptive responses that can typically reverse when the
stressor is removed, though metaplasia can progress to dysplasia.
Q5. A client experiencing ischemia to the kidney would most likely demonstrate which type of
necrosis?
A. Liquefactive necrosis
B. Caseous necrosis
C. Coagulative necrosis
D. Fat necrosis
Correct Answer: C. Coagulative necrosis
Rationale: Coagulative necrosis is characteristic of ischemic injury in most organs, including the
kidney, heart, and spleen. The structural framework of the tissue remains visible for days after cell
death due to protein denaturation. Liquefactive necrosis occurs primarily in the brain and in
abscesses, caseous necrosis is associated with tuberculosis, and fat necrosis occurs in pancreatic
injury or breast trauma.
3|Page
, Q6. A client dies from a brain infarct. The area of necrosis in the brain is best described as:
A. Coagulative necrosis
B. Liquefactive necrosis
C. Caseous necrosis
D. Fibrinoid necrosis
Correct Answer: B. Liquefactive necrosis
Rationale: Liquefactive necrosis occurs in the brain because the tissue lacks substantial structural
framework and enzymatic digestion rapidly transforms dead cells into a soft, liquefied mass.
Coagulative necrosis characterizes ischemic injury in most other organs. Caseous necrosis is seen in
tuberculosis, and fibrinoid necrosis occurs in blood vessel walls in immune-mediated injury.
Q7. During apoptosis, which cellular event distinguishes this process from necrosis?
A. Cell swelling with membrane rupture
B. Release of intracellular contents triggering inflammation
C. Organized DNA fragmentation without inflammation
D. Random enzymatic digestion of cellular components
Correct Answer: C. Organized DNA fragmentation without inflammation
Rationale: Apoptosis is programmed cell death characterized by cell shrinkage, chromatin
condensation, organized DNA fragmentation, and formation of apoptotic bodies that are
phagocytosed without triggering inflammation. In contrast, necrosis involves cellular swelling,
membrane rupture, release of intracellular contents, and a significant inflammatory response.
Q8. Which mechanism is primarily responsible for reperfusion injury following an ischemic
event?
A. Restoration of normal pH
B. Generation of reactive oxygen species
C. Decreased intracellular calcium
D. Suppression of immune mediators
Correct Answer: B. Generation of reactive oxygen species
Rationale: Reperfusion injury occurs when blood supply returns to ischemic tissue, paradoxically
causing additional damage through reactive oxygen species (ROS) such as superoxide and hydroxyl
radicals. These molecules cause oxidative damage to membranes, proteins, and DNA. Restoration of
oxygen promotes ROS formation through mitochondrial dysfunction and xanthine oxidase activation.
Q9. A client presents with severe hypocalcemia. Which clinical sign would the nurse expect to
assess?
A. Trousseau's sign
B. Babinski sign
4|Page
