WGU ADVANCED PATHOPHYSIOLOGY — D115
WGU D115 OA AND PRE-OA REVIEW A+
TEST BANK 2026/2027
Real Exam Questions and Correct Answers (Guaranteed Pass) | D115 Advanced Pathophysiology Exam Test Bank (New!) — A+ Verified
A+ QUESTIONS 5 SECTIONS 100% RATIONALES
VERIFIED COVERED INCLUDED
CATEGORIES
■ Section 1: Cellular Injury, Inflammation, Immunity & Genetics
■ Section 2: Fluid/Electrolyte/Acid-Base & Hematology
■ Section 3: Cardiovascular & Respiratory
■ Section 4: Endocrine, Renal & GI
■ Section 5: Neurologic, MSK & Reproductive
Examination Specifications
• Question Format: Multiple Choice (A–D)
• Total Marks: 1 mark per question
• Passing Score: 75%
• Cognitive Level: Application & Analysis
• Content aligned to WGU D115 Units 2–7 Advanced Pathophysiology.
STUVIAACTUALEXAM
STUVIAACTUALEXAM Page 1
, SECTION 1: Cellular Injury, Inflammation, Immunity & Genetics
Q1.
A patient sustains prolonged ischemia to a lower limb. Upon reperfusion, tissue damage increases rather than improves. Which mechanism best explains this
reperfusion injury?
A. Generation of reactive oxygen species and inflammatory mediators when oxygen is reintroduced to ischemic tissue
B. Immediate restoration of ATP stores without free-radical formation
C. Exclusive reliance on anaerobic metabolism after blood flow returns
D. Complete absence of neutrophil activity
Correct Answer: A
Rationale: Reperfusion injury is driven largely by oxidative stress and inflammation when oxygen returns to previously ischemic cells.
Q2.
A pathologist examines tissue showing cellular swelling, fatty change, and loss of ATP. The changes reverse when the stress is removed. What type of cellular
alteration is described?
A. Reversible cell injury
B. Metaplasia
C. Apoptosis
D. Necrosis
Correct Answer: A
Rationale: Cellular swelling and fatty change with preserved potential for recovery characterize reversible injury.
Q3.
A chronic smoker develops replacement of normal bronchial columnar epithelium with stratified squamous epithelium. What adaptive process is this?
A. Hypertrophy
B. Atrophy
C. Hyperplasia
D. Metaplasia
Correct Answer: D
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by another, often in response to chronic irritation.
Q4.
During acute inflammation, neutrophils migrate from the bloodstream into tissue. Which sequence of events is correct?
A. Diapedesis, then margination, then chemotaxis
B. Margination and rolling, adhesion, diapedesis, then chemotaxis toward the injury
C. Chemotaxis only within the vessel lumen
D. Immediate apoptosis of neutrophils before emigration
Correct Answer: B
Rationale: Leukocyte recruitment follows margination/rolling, firm adhesion, transmigration (diapedesis), and chemotaxis.
Q5.
A patient with a genetic deficiency of C1 inhibitor experiences recurrent episodes of non-pitting edema. Which pathway is excessively activated?
A. Only adaptive antibody production
B. Exclusively the coagulation cascade
C. The classical complement pathway and contact system, leading to excess bradykinin and angioedema
D. Only the alternative complement pathway without bradykinin involvement
Correct Answer: C
Rationale: C1-inhibitor deficiency allows uncontrolled activation that generates excess bradykinin, producing hereditary angioedema.
Q6.
A delayed-type hypersensitivity reaction (e.g., tuberculin skin test) is mediated primarily by which cells?
A. IgE-coated mast cells only
B. Eosinophils without T-cell involvement
C. T lymphocytes (especially Th1) and macrophages
D. Neutrophils exclusively
Correct Answer: C
Rationale: Type IV hypersensitivity is T-cell mediated and involves macrophage activation.
Q7.
A newborn has conjugated hyperbilirubinemia and dark urine. Laboratory studies suggest impaired canalicular excretion of bilirubin. Which process is
defective?
A. Uptake of unconjugated bilirubin into hepatocytes only
B. Excretion of conjugated bilirubin into the bile
C. Conversion of biliverdin to bilirubin
D. Intestinal reabsorption of urobilinogen exclusively
Correct Answer: B
Rationale: Conjugated hyperbilirubinemia with dark urine points to impaired biliary excretion after conjugation.
STUVIAACTUALEXAM Page 2
WGU D115 OA AND PRE-OA REVIEW A+
TEST BANK 2026/2027
Real Exam Questions and Correct Answers (Guaranteed Pass) | D115 Advanced Pathophysiology Exam Test Bank (New!) — A+ Verified
A+ QUESTIONS 5 SECTIONS 100% RATIONALES
VERIFIED COVERED INCLUDED
CATEGORIES
■ Section 1: Cellular Injury, Inflammation, Immunity & Genetics
■ Section 2: Fluid/Electrolyte/Acid-Base & Hematology
■ Section 3: Cardiovascular & Respiratory
■ Section 4: Endocrine, Renal & GI
■ Section 5: Neurologic, MSK & Reproductive
Examination Specifications
• Question Format: Multiple Choice (A–D)
• Total Marks: 1 mark per question
• Passing Score: 75%
• Cognitive Level: Application & Analysis
• Content aligned to WGU D115 Units 2–7 Advanced Pathophysiology.
STUVIAACTUALEXAM
STUVIAACTUALEXAM Page 1
, SECTION 1: Cellular Injury, Inflammation, Immunity & Genetics
Q1.
A patient sustains prolonged ischemia to a lower limb. Upon reperfusion, tissue damage increases rather than improves. Which mechanism best explains this
reperfusion injury?
A. Generation of reactive oxygen species and inflammatory mediators when oxygen is reintroduced to ischemic tissue
B. Immediate restoration of ATP stores without free-radical formation
C. Exclusive reliance on anaerobic metabolism after blood flow returns
D. Complete absence of neutrophil activity
Correct Answer: A
Rationale: Reperfusion injury is driven largely by oxidative stress and inflammation when oxygen returns to previously ischemic cells.
Q2.
A pathologist examines tissue showing cellular swelling, fatty change, and loss of ATP. The changes reverse when the stress is removed. What type of cellular
alteration is described?
A. Reversible cell injury
B. Metaplasia
C. Apoptosis
D. Necrosis
Correct Answer: A
Rationale: Cellular swelling and fatty change with preserved potential for recovery characterize reversible injury.
Q3.
A chronic smoker develops replacement of normal bronchial columnar epithelium with stratified squamous epithelium. What adaptive process is this?
A. Hypertrophy
B. Atrophy
C. Hyperplasia
D. Metaplasia
Correct Answer: D
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by another, often in response to chronic irritation.
Q4.
During acute inflammation, neutrophils migrate from the bloodstream into tissue. Which sequence of events is correct?
A. Diapedesis, then margination, then chemotaxis
B. Margination and rolling, adhesion, diapedesis, then chemotaxis toward the injury
C. Chemotaxis only within the vessel lumen
D. Immediate apoptosis of neutrophils before emigration
Correct Answer: B
Rationale: Leukocyte recruitment follows margination/rolling, firm adhesion, transmigration (diapedesis), and chemotaxis.
Q5.
A patient with a genetic deficiency of C1 inhibitor experiences recurrent episodes of non-pitting edema. Which pathway is excessively activated?
A. Only adaptive antibody production
B. Exclusively the coagulation cascade
C. The classical complement pathway and contact system, leading to excess bradykinin and angioedema
D. Only the alternative complement pathway without bradykinin involvement
Correct Answer: C
Rationale: C1-inhibitor deficiency allows uncontrolled activation that generates excess bradykinin, producing hereditary angioedema.
Q6.
A delayed-type hypersensitivity reaction (e.g., tuberculin skin test) is mediated primarily by which cells?
A. IgE-coated mast cells only
B. Eosinophils without T-cell involvement
C. T lymphocytes (especially Th1) and macrophages
D. Neutrophils exclusively
Correct Answer: C
Rationale: Type IV hypersensitivity is T-cell mediated and involves macrophage activation.
Q7.
A newborn has conjugated hyperbilirubinemia and dark urine. Laboratory studies suggest impaired canalicular excretion of bilirubin. Which process is
defective?
A. Uptake of unconjugated bilirubin into hepatocytes only
B. Excretion of conjugated bilirubin into the bile
C. Conversion of biliverdin to bilirubin
D. Intestinal reabsorption of urobilinogen exclusively
Correct Answer: B
Rationale: Conjugated hyperbilirubinemia with dark urine points to impaired biliary excretion after conjugation.
STUVIAACTUALEXAM Page 2
