NSG 530 Exam 1-4 Advanced Pathophysiology Question Bank
(Latest 2026/2027 Edition) – 100% Correct Questions, Answers
& Detailed Rationales
Wilkes University
Total Questions: 93
Time Allowed: 150 Minutes (All Exams Combined)
Instructions: Select the BEST answer for each question based on advanced
pathophysiology principles and clinical reasoning. For SATA questions, select all that
apply.
EXAM 1: CELLULAR BIOLOGY, GENETICS & IMMUNE RESPONSE
Questions 1–25
Question 1
A 58-year-old male with a 30-pack-year smoking history presents with a chronic cough
and dyspnea. Bronchial biopsy reveals pseudostratified ciliated columnar epithelium
replaced by stratified squamous epithelium. This cellular adaptation is best classified
as:
A. Hypertrophy
B. Hyperplasia
C. Metaplasia
,D. Dysplasia
Correct Answer: C
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by
another, typically in response to chronic irritation; smoking-induced squamous
metaplasia in the respiratory tract is a classic example. Option A is incorrect because
hypertrophy involves increased cell size, not cell type replacement. Option B is incorrect
because hyperplasia involves increased cell number within the same cell type. Option D
is incorrect because dysplasia involves disordered, atypical cellular growth rather than
orderly replacement of one mature cell type by another.
Question 2
A patient with severe hypovolemic shock develops cellular swelling in the liver. Which
pathophysiological mechanism is primarily responsible for this reversible injury?
A. Lysosomal rupture and enzymatic autodigestion
B. ATP depletion causing failure of the Na⁺/K⁺-ATPase pump
C. Activation of caspase-mediated apoptosis
D. Nuclear fragmentation and chromatin clumping
Correct Answer: B
Rationale: Cellular swelling (hydropic change) is the earliest manifestation of reversible
injury, caused by ATP depletion and failure of the Na⁺/K⁺-ATPase pump, leading to
osmotic influx of water and sodium. Option A describes irreversible injury with
lysosomal membrane rupture. Option C describes programmed cell death, not reversible
swelling. Option D describes nuclear changes of irreversible injury (karyorrhexis,
pyknosis).
Question 3
,A 45-year-old woman with chronic gastroesophageal reflux disease undergoes
endoscopy. Biopsy of the distal esophagus shows columnar epithelium with goblet cells
replacing the normal squamous epithelium. The nurse practitioner recognizes this as
Barrett's esophagus. This adaptation increases the patient's risk for which
complication?
A. Achalasia
B. Adenocarcinoma
C. Esophageal varices
D. Mallory-Weiss tear
Correct Answer: B
Rationale: Barrett's esophagus is intestinal metaplasia that significantly increases the
risk of esophageal adenocarcinoma due to the dysplastic potential of columnar
epithelium in the squamous-lined esophagus. Option A is incorrect because achalasia is
a motility disorder unrelated to metaplasia. Option C is incorrect because esophageal
varices result from portal hypertension. Option D is incorrect because Mallory-Weiss
tears are mucosal lacerations from vomiting.
Question 4
Which of the following cellular changes indicates irreversible injury? Select all that
apply.
A. Cellular swelling with dispersed ribosomes
B. Mitochondrial vacuolization
C. Karyorrhexis
D. Cytoplasmic eosinophilia and loss of nuclear basophilia
E. Membrane blebbing
Correct Answers: C, D
, Rationale: Karyorrhexis (nuclear fragmentation) and cytoplasmic eosinophilia with
nuclear changes (karyolysis, pyknosis) are hallmarks of irreversible cell injury and
necrosis. Options A, B, and E describe reversible injury patterns: cellular swelling with
intact organelles, mitochondrial changes, and membrane blebbing are potentially
recoverable if the insult is removed.
Question 5
A child is born with severe combined immunodeficiency (SCID). The parents are
phenotypically normal. Which inheritance pattern is most consistent with this
presentation?
A. Autosomal dominant
B. Autosomal recessive
C. X-linked recessive
D. Mitochondrial inheritance
Correct Answer: B
Rationale: The most common form of SCID (X-linked SCID excepted) follows autosomal
recessive inheritance, requiring both parents to be heterozygous carriers with a 25%
recurrence risk for affected offspring. Option A is incorrect because autosomal
dominant disorders typically appear in every generation. Option C is incorrect because
X-linked SCID would affect males predominantly with carrier mothers. Option D is
incorrect because mitochondrial disorders show exclusively maternal inheritance and
typically affect energy-dependent tissues.
Question 6
A 35-year-old woman is diagnosed with Li-Fraumeni syndrome after developing breast
cancer and a subsequent sarcoma. Genetic testing reveals a mutation in the TP53 gene.
This gene functions primarily as:
(Latest 2026/2027 Edition) – 100% Correct Questions, Answers
& Detailed Rationales
Wilkes University
Total Questions: 93
Time Allowed: 150 Minutes (All Exams Combined)
Instructions: Select the BEST answer for each question based on advanced
pathophysiology principles and clinical reasoning. For SATA questions, select all that
apply.
EXAM 1: CELLULAR BIOLOGY, GENETICS & IMMUNE RESPONSE
Questions 1–25
Question 1
A 58-year-old male with a 30-pack-year smoking history presents with a chronic cough
and dyspnea. Bronchial biopsy reveals pseudostratified ciliated columnar epithelium
replaced by stratified squamous epithelium. This cellular adaptation is best classified
as:
A. Hypertrophy
B. Hyperplasia
C. Metaplasia
,D. Dysplasia
Correct Answer: C
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by
another, typically in response to chronic irritation; smoking-induced squamous
metaplasia in the respiratory tract is a classic example. Option A is incorrect because
hypertrophy involves increased cell size, not cell type replacement. Option B is incorrect
because hyperplasia involves increased cell number within the same cell type. Option D
is incorrect because dysplasia involves disordered, atypical cellular growth rather than
orderly replacement of one mature cell type by another.
Question 2
A patient with severe hypovolemic shock develops cellular swelling in the liver. Which
pathophysiological mechanism is primarily responsible for this reversible injury?
A. Lysosomal rupture and enzymatic autodigestion
B. ATP depletion causing failure of the Na⁺/K⁺-ATPase pump
C. Activation of caspase-mediated apoptosis
D. Nuclear fragmentation and chromatin clumping
Correct Answer: B
Rationale: Cellular swelling (hydropic change) is the earliest manifestation of reversible
injury, caused by ATP depletion and failure of the Na⁺/K⁺-ATPase pump, leading to
osmotic influx of water and sodium. Option A describes irreversible injury with
lysosomal membrane rupture. Option C describes programmed cell death, not reversible
swelling. Option D describes nuclear changes of irreversible injury (karyorrhexis,
pyknosis).
Question 3
,A 45-year-old woman with chronic gastroesophageal reflux disease undergoes
endoscopy. Biopsy of the distal esophagus shows columnar epithelium with goblet cells
replacing the normal squamous epithelium. The nurse practitioner recognizes this as
Barrett's esophagus. This adaptation increases the patient's risk for which
complication?
A. Achalasia
B. Adenocarcinoma
C. Esophageal varices
D. Mallory-Weiss tear
Correct Answer: B
Rationale: Barrett's esophagus is intestinal metaplasia that significantly increases the
risk of esophageal adenocarcinoma due to the dysplastic potential of columnar
epithelium in the squamous-lined esophagus. Option A is incorrect because achalasia is
a motility disorder unrelated to metaplasia. Option C is incorrect because esophageal
varices result from portal hypertension. Option D is incorrect because Mallory-Weiss
tears are mucosal lacerations from vomiting.
Question 4
Which of the following cellular changes indicates irreversible injury? Select all that
apply.
A. Cellular swelling with dispersed ribosomes
B. Mitochondrial vacuolization
C. Karyorrhexis
D. Cytoplasmic eosinophilia and loss of nuclear basophilia
E. Membrane blebbing
Correct Answers: C, D
, Rationale: Karyorrhexis (nuclear fragmentation) and cytoplasmic eosinophilia with
nuclear changes (karyolysis, pyknosis) are hallmarks of irreversible cell injury and
necrosis. Options A, B, and E describe reversible injury patterns: cellular swelling with
intact organelles, mitochondrial changes, and membrane blebbing are potentially
recoverable if the insult is removed.
Question 5
A child is born with severe combined immunodeficiency (SCID). The parents are
phenotypically normal. Which inheritance pattern is most consistent with this
presentation?
A. Autosomal dominant
B. Autosomal recessive
C. X-linked recessive
D. Mitochondrial inheritance
Correct Answer: B
Rationale: The most common form of SCID (X-linked SCID excepted) follows autosomal
recessive inheritance, requiring both parents to be heterozygous carriers with a 25%
recurrence risk for affected offspring. Option A is incorrect because autosomal
dominant disorders typically appear in every generation. Option C is incorrect because
X-linked SCID would affect males predominantly with carrier mothers. Option D is
incorrect because mitochondrial disorders show exclusively maternal inheritance and
typically affect energy-dependent tissues.
Question 6
A 35-year-old woman is diagnosed with Li-Fraumeni syndrome after developing breast
cancer and a subsequent sarcoma. Genetic testing reveals a mutation in the TP53 gene.
This gene functions primarily as:
