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NURS 6501 Advanced Pathophysiology Walden
University Midterm Exam Actual Exam 2026/2027 –
Complete Exam-Style Questions with Detailed
Rationales | Pass Guaranteed – A+ Graded
[SECTION 1: Cellular & Genetic Pathophysiology — Questions 1-20]
Q1: A 45-year-old male presents with enlarged skeletal muscle cells in his legs due to intense
weight training. Which of the following cellular adaptations is most likely occurring?
A. Hyperplasia
B. Atrophy
C. Hypertrophy [CORRECT]
D. Metaplasia
Correct Answer: C
Rationale: Hypertrophy is defined as an increase in the size of individual cells, resulting in an
increase in the size of the organ, commonly occurring in skeletal muscle due to increased
workload or exercise. Hyperplasia involves an increase in the number of cells, which does not
typically occur in skeletal muscle fibers (they are post-mitotic). Atrophy is a decrease in cell size,
and metaplasia is a change in cell type, neither of which fits the physiological adaptation
described.
Q2: A patient with chronic gastric reflux undergoes a biopsy of the esophageal lining. The report
indicates the replacement of stratified squamous epithelium with simple columnar epithelium
containing goblet cells. This pathological adaptation is best described as:
A. Dysplasia
B. Anaplasia
C. Hyperplasia
D. Metaplasia [CORRECT]
,2
Correct Answer: D
Rationale: Metaplasia is the reversible replacement of one differentiated cell type with another,
often in response to chronic irritation or inflammation; in this case, the transformation to
intestinal-type epithelium (Barrett esophagus) protects against acid but increases cancer risk.
Dysplasia refers to disordered cellular growth and development characteristic of neoplastic
transformation. Anaplasia refers to a loss of differentiation seen in malignant cells, and
hyperplasia is an increase in the number of cells, not a change in type.
Q3: A 68-year-old female suffers a stroke with loss of blood supply to her brain tissue. The
affected neurons undergo cellular swelling and dissolution of the organelles. This type of cell
death is characterized by:
A. Apoptosis
B. Necrosis
C. Liquefactive necrosis [CORRECT]
D. Caseous necrosis
Correct Answer: C
Rationale: Liquefactive necrosis occurs in the brain due to the high lipid content and lysosomal
enzymes of glial cells, resulting in the transformation of tissue into a liquid viscous mass.
Apoptosis is programmed cell death that does not induce inflammation. While necrosis is the
overarching category, "liquefactive" is the specific morphological pattern seen in the CNS.
Caseous necrosis is associated with tuberculosis and appears cheese-like.
Q4: A laboratory report notes that a patient’s cells have sustained damage due to the
accumulation of free radicals exceeding the cell's antioxidant buffering capacity. This
mechanism of injury is known as:
A. ATP depletion
B. Calcium influx
C. Membrane damage
D. Oxidative stress [CORRECT]
,3
Correct Answer: D
Rationale: Oxidative stress occurs when there is an imbalance between the production of
reactive oxygen species (free radicals) and the body's ability to neutralize them with
antioxidants (like glutathione, catalase). This leads to lipid peroxidation, DNA breaks, and
protein damage. ATP depletion is related to hypoxia/ischemia. Calcium influx and membrane
damage are often downstream effects of other injuries, including oxidative stress, but oxidative
stress is the specific mechanism described.
Q5: During a genetic counseling session, a couple learns that their child has cystic fibrosis.
Which mode of inheritance best explains this pattern?
A. Autosomal dominant
B. X-linked recessive
C. Autosomal recessive [CORRECT]
D. X-linked dominant
Correct Answer: C
Rationale: Cystic fibrosis is caused by mutations in the CFTR gene and follows an autosomal
recessive inheritance pattern, meaning the child must inherit two defective copies (one from
each parent) to express the disease. Autosomal dominant requires only one defective gene copy
(e.g., Huntington disease). X-linked recessive affects males more frequently (e.g., Hemophilia),
and X-linked dominant affects both sexes but is passed via the X chromosome.
Q6: A young child presents with a characteristic "cri du chat" (cry of the cat) sound.
Chromosomal analysis reveals a deletion on the short arm of chromosome 5. This is an example
of:
A. Trisomy
B. Monosomy
C. Deletion [CORRECT]
D. Translocation
, 4
Correct Answer: C
Rationale: Cri-du-chat syndrome is specifically caused by a deletion (a loss of a segment of DNA)
on the short arm (p) of chromosome 5. Trisomy refers to the presence of an extra chromosome
(e.g., Trisomy 21). Monosomy is the loss of a whole chromosome (e.g., Turner syndrome).
Translocation involves the transfer of a segment of one chromosome to another (e.g.,
Philadelphia chromosome).
Q7: A patient is diagnosed with a condition where cells exhibit disordered growth and
maturation, with variation in cell size and shape. This is most accurately termed:
A. Hyperplasia
B. Dysplasia [CORRECT]
C. Anaplasia
D. Metaplasia
Correct Answer: B
Rationale: Dysplasia refers to deranged cellular growth, specifically characterized by changes in
the size, shape, and organization of cells; it is often a precursor to cancer (preneoplastic).
Hyperplasia is an increase in the number of cells. Anaplasia is a hallmark of malignancy where
cells are undifferentiated and primitive. Metaplasia is the conversion of one cell type to another.
Q8: A researcher is studying a genetic disorder where the affected individual has 47
chromosomes, including three copies of chromosome 21. This chromosomal abnormality is
known as:
A. Nondisjunction
B. Trisomy 21 [CORRECT]
C. Philadelphia chromosome
D. Robertsonian translocation
NURS 6501 Advanced Pathophysiology Walden
University Midterm Exam Actual Exam 2026/2027 –
Complete Exam-Style Questions with Detailed
Rationales | Pass Guaranteed – A+ Graded
[SECTION 1: Cellular & Genetic Pathophysiology — Questions 1-20]
Q1: A 45-year-old male presents with enlarged skeletal muscle cells in his legs due to intense
weight training. Which of the following cellular adaptations is most likely occurring?
A. Hyperplasia
B. Atrophy
C. Hypertrophy [CORRECT]
D. Metaplasia
Correct Answer: C
Rationale: Hypertrophy is defined as an increase in the size of individual cells, resulting in an
increase in the size of the organ, commonly occurring in skeletal muscle due to increased
workload or exercise. Hyperplasia involves an increase in the number of cells, which does not
typically occur in skeletal muscle fibers (they are post-mitotic). Atrophy is a decrease in cell size,
and metaplasia is a change in cell type, neither of which fits the physiological adaptation
described.
Q2: A patient with chronic gastric reflux undergoes a biopsy of the esophageal lining. The report
indicates the replacement of stratified squamous epithelium with simple columnar epithelium
containing goblet cells. This pathological adaptation is best described as:
A. Dysplasia
B. Anaplasia
C. Hyperplasia
D. Metaplasia [CORRECT]
,2
Correct Answer: D
Rationale: Metaplasia is the reversible replacement of one differentiated cell type with another,
often in response to chronic irritation or inflammation; in this case, the transformation to
intestinal-type epithelium (Barrett esophagus) protects against acid but increases cancer risk.
Dysplasia refers to disordered cellular growth and development characteristic of neoplastic
transformation. Anaplasia refers to a loss of differentiation seen in malignant cells, and
hyperplasia is an increase in the number of cells, not a change in type.
Q3: A 68-year-old female suffers a stroke with loss of blood supply to her brain tissue. The
affected neurons undergo cellular swelling and dissolution of the organelles. This type of cell
death is characterized by:
A. Apoptosis
B. Necrosis
C. Liquefactive necrosis [CORRECT]
D. Caseous necrosis
Correct Answer: C
Rationale: Liquefactive necrosis occurs in the brain due to the high lipid content and lysosomal
enzymes of glial cells, resulting in the transformation of tissue into a liquid viscous mass.
Apoptosis is programmed cell death that does not induce inflammation. While necrosis is the
overarching category, "liquefactive" is the specific morphological pattern seen in the CNS.
Caseous necrosis is associated with tuberculosis and appears cheese-like.
Q4: A laboratory report notes that a patient’s cells have sustained damage due to the
accumulation of free radicals exceeding the cell's antioxidant buffering capacity. This
mechanism of injury is known as:
A. ATP depletion
B. Calcium influx
C. Membrane damage
D. Oxidative stress [CORRECT]
,3
Correct Answer: D
Rationale: Oxidative stress occurs when there is an imbalance between the production of
reactive oxygen species (free radicals) and the body's ability to neutralize them with
antioxidants (like glutathione, catalase). This leads to lipid peroxidation, DNA breaks, and
protein damage. ATP depletion is related to hypoxia/ischemia. Calcium influx and membrane
damage are often downstream effects of other injuries, including oxidative stress, but oxidative
stress is the specific mechanism described.
Q5: During a genetic counseling session, a couple learns that their child has cystic fibrosis.
Which mode of inheritance best explains this pattern?
A. Autosomal dominant
B. X-linked recessive
C. Autosomal recessive [CORRECT]
D. X-linked dominant
Correct Answer: C
Rationale: Cystic fibrosis is caused by mutations in the CFTR gene and follows an autosomal
recessive inheritance pattern, meaning the child must inherit two defective copies (one from
each parent) to express the disease. Autosomal dominant requires only one defective gene copy
(e.g., Huntington disease). X-linked recessive affects males more frequently (e.g., Hemophilia),
and X-linked dominant affects both sexes but is passed via the X chromosome.
Q6: A young child presents with a characteristic "cri du chat" (cry of the cat) sound.
Chromosomal analysis reveals a deletion on the short arm of chromosome 5. This is an example
of:
A. Trisomy
B. Monosomy
C. Deletion [CORRECT]
D. Translocation
, 4
Correct Answer: C
Rationale: Cri-du-chat syndrome is specifically caused by a deletion (a loss of a segment of DNA)
on the short arm (p) of chromosome 5. Trisomy refers to the presence of an extra chromosome
(e.g., Trisomy 21). Monosomy is the loss of a whole chromosome (e.g., Turner syndrome).
Translocation involves the transfer of a segment of one chromosome to another (e.g.,
Philadelphia chromosome).
Q7: A patient is diagnosed with a condition where cells exhibit disordered growth and
maturation, with variation in cell size and shape. This is most accurately termed:
A. Hyperplasia
B. Dysplasia [CORRECT]
C. Anaplasia
D. Metaplasia
Correct Answer: B
Rationale: Dysplasia refers to deranged cellular growth, specifically characterized by changes in
the size, shape, and organization of cells; it is often a precursor to cancer (preneoplastic).
Hyperplasia is an increase in the number of cells. Anaplasia is a hallmark of malignancy where
cells are undifferentiated and primitive. Metaplasia is the conversion of one cell type to another.
Q8: A researcher is studying a genetic disorder where the affected individual has 47
chromosomes, including three copies of chromosome 21. This chromosomal abnormality is
known as:
A. Nondisjunction
B. Trisomy 21 [CORRECT]
C. Philadelphia chromosome
D. Robertsonian translocation
