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WGU D115 OA ADVANCED PATHOPHYSIOLOGY - ACTUAL
EXAM 2026/2027 | EXPERT VERIFIED | 100 VERIFIED Q&A |
COMPLETE RATIONALES | PASS GUARANTEED - A+
GRADED
EXAM OVERVIEW
This comprehensive exam covers the WGU D115 Advanced Pathophysiology Objective Assessment (OA),
including cellular adaptation and injury, inflammation and immunity, genetics, fluid and electrolyte
disorders, and pathophysiology across all major body systems .
QUESTION 1
A client with longstanding hypertension develops left ventricular hypertrophy. Which cellular adaptation best
explains this change?
A) Hyperplasia
B) Metaplasia
C) Hypertrophy
D) Dysplasia
Correct Answer: C
Rationale: Hypertrophy is an increase in cell size in response to increased workload. Cardiac myocytes cannot
significantly divide, so the heart compensates for increased afterload by enlarging existing cells rather than
increasing cell number .
QUESTION 2
A client experiences prolonged myocardial ischemia resulting in irreversible injury and cell membrane
rupture. Which type of cellular death has most likely occurred?
A) Apoptosis
B) Necrosis
C) Atrophy
D) Autophagy
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Correct Answer: B
Rationale: Necrosis results from irreversible cellular injury and is characterized by cell swelling, membrane
rupture, and inflammation. This is distinct from apoptosis, which is programmed cell death without
inflammation .
QUESTION 3
A patient with COPD develops chronic irritation of the bronchial epithelium. Which cellular change is most
likely to occur?
A) Hypertrophy
B) Metaplasia
C) Hyperplasia
D) Dysplasia
Correct Answer: B
Rationale: Metaplasia is a reversible change in which one differentiated cell type is replaced by another. In
COPD, chronic irritation from smoking causes the normal ciliated columnar epithelium to be replaced by
stratified squamous epithelium .
QUESTION 4
A patient with gastroesophageal reflux disease develops Barrett's esophagus. This is an example of which
cellular adaptation?
A) Hypertrophy
B) Hyperplasia
C) Metaplasia
D) Dysplasia
Correct Answer: C
Rationale: Barrett's esophagus is a metaplastic change in which the normal squamous epithelium of the
esophagus is replaced by columnar epithelium in response to chronic acid exposure. This is a premalignant
condition .
QUESTION 5
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Which inheritance pattern is associated with cystic fibrosis?
A) Autosomal dominant
B) Autosomal recessive
C) X-linked recessive
D) Mitochondrial
Correct Answer: B
Rationale: Cystic fibrosis requires inheritance of two defective CFTR genes, making it an autosomal recessive
disorder. Both parents must be carriers for a child to be affected .
QUESTION 6
A male patient develops hemophilia A. Which inheritance pattern is most likely?
A) Autosomal dominant
B) Autosomal recessive
C) X-linked recessive
D) Mitochondrial
Correct Answer: C
Rationale: Hemophilia A is an X-linked recessive disorder, which means it commonly affects males because
they possess only one X chromosome. Females can be carriers with a normal second X chromosome .
QUESTION 7
A child is born with an extra copy of chromosome 21. Which syndrome is present?
A) Turner syndrome
B) Klinefelter syndrome
C) Down syndrome
D) Edwards syndrome
Correct Answer: C
Rationale: Down syndrome (Trisomy 21) is caused by the presence of an extra copy of chromosome 21.
Turner syndrome is 45,XO; Klinefelter is 47,XXY; Edwards is Trisomy 18 .
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QUESTION 8
A patient with severe nausea and vomiting from an intestinal obstruction develops acute kidney injury. Which
type of kidney injury is most likely?
A) Prerenal azotemia
B) Intrinsic renal failure
C) Postrenal failure
D) Glomerulonephritis
Correct Answer: A
Rationale: Prerenal azotemia occurs due to decreased blood flow to the kidneys from volume depletion.
Severe vomiting leads to fluid loss, reducing renal perfusion and causing prerenal injury .
QUESTION 9
A patient is diagnosed with an autoimmune disorder. Which pathophysiological mechanism best explains this
condition?
A) Deficient red blood cell production
B) Failure of self-tolerance resulting in immune attack against self-antigens
C) Excessive production of digestive enzymes
D) Inadequate oxygen transport
Correct Answer: B
Rationale: Autoimmune disorders occur when immune tolerance mechanisms fail, leading the immune
system to recognize and attack normal body tissues as foreign .
QUESTION 10
A patient with a peanut allergy develops widespread vasodilation and bronchoconstriction within minutes of
exposure. Which hypersensitivity mechanism is responsible?
A) Type I hypersensitivity
B) Type II hypersensitivity
C) Type III hypersensitivity
D) Type IV hypersensitivity
WGU D115 OA ADVANCED PATHOPHYSIOLOGY - ACTUAL
EXAM 2026/2027 | EXPERT VERIFIED | 100 VERIFIED Q&A |
COMPLETE RATIONALES | PASS GUARANTEED - A+
GRADED
EXAM OVERVIEW
This comprehensive exam covers the WGU D115 Advanced Pathophysiology Objective Assessment (OA),
including cellular adaptation and injury, inflammation and immunity, genetics, fluid and electrolyte
disorders, and pathophysiology across all major body systems .
QUESTION 1
A client with longstanding hypertension develops left ventricular hypertrophy. Which cellular adaptation best
explains this change?
A) Hyperplasia
B) Metaplasia
C) Hypertrophy
D) Dysplasia
Correct Answer: C
Rationale: Hypertrophy is an increase in cell size in response to increased workload. Cardiac myocytes cannot
significantly divide, so the heart compensates for increased afterload by enlarging existing cells rather than
increasing cell number .
QUESTION 2
A client experiences prolonged myocardial ischemia resulting in irreversible injury and cell membrane
rupture. Which type of cellular death has most likely occurred?
A) Apoptosis
B) Necrosis
C) Atrophy
D) Autophagy
,2
Correct Answer: B
Rationale: Necrosis results from irreversible cellular injury and is characterized by cell swelling, membrane
rupture, and inflammation. This is distinct from apoptosis, which is programmed cell death without
inflammation .
QUESTION 3
A patient with COPD develops chronic irritation of the bronchial epithelium. Which cellular change is most
likely to occur?
A) Hypertrophy
B) Metaplasia
C) Hyperplasia
D) Dysplasia
Correct Answer: B
Rationale: Metaplasia is a reversible change in which one differentiated cell type is replaced by another. In
COPD, chronic irritation from smoking causes the normal ciliated columnar epithelium to be replaced by
stratified squamous epithelium .
QUESTION 4
A patient with gastroesophageal reflux disease develops Barrett's esophagus. This is an example of which
cellular adaptation?
A) Hypertrophy
B) Hyperplasia
C) Metaplasia
D) Dysplasia
Correct Answer: C
Rationale: Barrett's esophagus is a metaplastic change in which the normal squamous epithelium of the
esophagus is replaced by columnar epithelium in response to chronic acid exposure. This is a premalignant
condition .
QUESTION 5
,3
Which inheritance pattern is associated with cystic fibrosis?
A) Autosomal dominant
B) Autosomal recessive
C) X-linked recessive
D) Mitochondrial
Correct Answer: B
Rationale: Cystic fibrosis requires inheritance of two defective CFTR genes, making it an autosomal recessive
disorder. Both parents must be carriers for a child to be affected .
QUESTION 6
A male patient develops hemophilia A. Which inheritance pattern is most likely?
A) Autosomal dominant
B) Autosomal recessive
C) X-linked recessive
D) Mitochondrial
Correct Answer: C
Rationale: Hemophilia A is an X-linked recessive disorder, which means it commonly affects males because
they possess only one X chromosome. Females can be carriers with a normal second X chromosome .
QUESTION 7
A child is born with an extra copy of chromosome 21. Which syndrome is present?
A) Turner syndrome
B) Klinefelter syndrome
C) Down syndrome
D) Edwards syndrome
Correct Answer: C
Rationale: Down syndrome (Trisomy 21) is caused by the presence of an extra copy of chromosome 21.
Turner syndrome is 45,XO; Klinefelter is 47,XXY; Edwards is Trisomy 18 .
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QUESTION 8
A patient with severe nausea and vomiting from an intestinal obstruction develops acute kidney injury. Which
type of kidney injury is most likely?
A) Prerenal azotemia
B) Intrinsic renal failure
C) Postrenal failure
D) Glomerulonephritis
Correct Answer: A
Rationale: Prerenal azotemia occurs due to decreased blood flow to the kidneys from volume depletion.
Severe vomiting leads to fluid loss, reducing renal perfusion and causing prerenal injury .
QUESTION 9
A patient is diagnosed with an autoimmune disorder. Which pathophysiological mechanism best explains this
condition?
A) Deficient red blood cell production
B) Failure of self-tolerance resulting in immune attack against self-antigens
C) Excessive production of digestive enzymes
D) Inadequate oxygen transport
Correct Answer: B
Rationale: Autoimmune disorders occur when immune tolerance mechanisms fail, leading the immune
system to recognize and attack normal body tissues as foreign .
QUESTION 10
A patient with a peanut allergy develops widespread vasodilation and bronchoconstriction within minutes of
exposure. Which hypersensitivity mechanism is responsible?
A) Type I hypersensitivity
B) Type II hypersensitivity
C) Type III hypersensitivity
D) Type IV hypersensitivity
