WGU D115 OBJECTIVE ASSESSMENT AND PRACTICE
EXAM LATEST 2025/2026 TEST BANK | COMPLETE 670
REAL EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES
ALREADY GRADED A+| D115 ADVANCED
PATHOPHYSIOLOGY OA FINAL EXAM PREP (BRAND
NEW!!)
Q1: A 55-year-old male with a 30-year history of hypertension presents with
dyspnea on exertion and peripheral edema. Echocardiogram reveals increased left
ventricular wall thickness without chamber dilation. Which cellular adaptation best
describes this finding?
A) Hyperplasia
B) Atrophy
C) Hypertrophy
D) Metaplasia
Answer: C
Rationale: Hypertrophy is an increase in cell size in response to increased
workload, as seen in the left ventricle of a patient with chronic hypertension. This
adaptation allows the heart to generate more force but eventually leads to impaired
function if the stress persists.
Q2: A patient with chronic gastroesophageal reflux disease develops replacement
of normal stratified squamous epithelium with columnar epithelium in the distal
esophagus. This cellular change is best described as:
A) Dysplasia
B) Metaplasia
C) Anaplasia
1|Page SUCCESS!!!
,D) Hyperplasia
Answer: B
Rationale: Metaplasia is the reversible replacement of one differentiated cell type
with another in response to chronic irritation. In Barrett's esophagus, the normal
squamous epithelium is replaced by columnar epithelium as an adaptive response
to acid exposure, though this increases the risk of adenocarcinoma.
Q3: A 68-year-old female with a history of smoking presents with a non-healing
ulcer on her lower leg. The wound is pale, dry, and painful, with well-demarcated
borders. Which pathophysiological mechanism is most likely responsible?
A) Venous insufficiency
B) Arterial insufficiency
C) Neuropathic changes
D) Pressure injury
Answer: B
Rationale: Arterial insufficiency ulcers are pale, dry, painful, and have well-
demarcated borders due to inadequate arterial blood flow. Venous ulcers are
typically moist and irregular with surrounding hemosiderin staining. Neuropathic
ulcers are painless and located on pressure points.
Q4: A 42-year-old female with systemic lupus erythematosus develops proteinuria,
hematuria, and hypertension. Renal biopsy shows immune complex deposition in
the glomerular basement membrane. Which type of hypersensitivity reaction is
primarily responsible for this glomerulonephritis?
A) Type I hypersensitivity
B) Type II hypersensitivity
C) Type III hypersensitivity
D) Type IV hypersensitivity
Answer: C
2|Page SUCCESS!!!
,Rationale: Systemic lupus erythematosus causes glomerulonephritis through Type
III hypersensitivity, where circulating immune complexes deposit in the
glomerular basement membrane, activating complement and causing inflammation.
Type I is anaphylactic, Type II is cytotoxic, and Type IV is delayed cell-mediated.
Question 5: A 28-year-old male presents with recurrent sinus and pulmonary
infections. Laboratory evaluation reveals low serum IgG, IgA, and IgM levels with
absent antibody response to vaccination. This presentation is most consistent with
which immunodeficiency?
A) Selective IgA deficiency
B) Common variable immunodeficiency
C) Severe combined immunodeficiency
D) Wiskott-Aldrich syndrome
Answer: B
Rationale: Common variable immunodeficiency is characterized by low levels of
all immunoglobulin classes with impaired antibody production, leading to
recurrent sinopulmonary infections. Selective IgA deficiency only affects IgA,
SCID presents in infancy, and Wiskott-Aldrich includes thrombocytopenia and
eczema.
Question 6: A 45-year-old female with rheumatoid arthritis is prescribed
methotrexate. Which mechanism of action makes methotrexate effective in
autoimmune disease?
A) Inhibition of TNF-alpha
B) Inhibition of dihydrofolate reductase
C) Blockade of IL-6 receptors
D) Depletion of B lymphocytes
Answer: B
Rationale: Methotrexate inhibits dihydrofolate reductase, reducing folate
availability and suppressing proliferation of activated lymphocytes. This decreases
3|Page SUCCESS!!!
, the inflammatory response in autoimmune conditions. TNF-alpha inhibitors, IL-6
receptor blockers, and B-cell depleting agents work through different mechanisms.
Question 7: A 60-year-old male with a history of type 2 diabetes presents with
sudden onset of severe chest pain radiating to the jaw, diaphoresis, and nausea.
ECG shows ST-segment elevation in leads V1–V4. Which coronary artery is most
likely occluded?
A) Right coronary artery
B) Left anterior descending artery
C) Left circumflex artery
D) Posterior descending artery
Answer: B
Rationale: ST-segment elevation in leads V1–V4 indicates an anterior wall
myocardial infarction, which is most commonly caused by occlusion of the left
anterior descending artery. The right coronary artery typically affects the inferior
wall (leads II, III, aVF), and the circumflex artery affects the lateral wall.
Question 8: A 72-year-old female with heart failure is prescribed furosemide.
Which electrolyte imbalance is the most significant concern with this medication?
A) Hyperkalemia
B) Hyponatremia
C) Hypokalemia
D) Hypercalcemia
Answer: C
Rationale: Furosemide is a loop diuretic that inhibits sodium and chloride
reabsorption in the ascending loop of Henle, leading to increased potassium
excretion. Hypokalemia is the most significant electrolyte concern and can
precipitate cardiac arrhythmias, especially in patients on digoxin.
4|Page SUCCESS!!!
EXAM LATEST 2025/2026 TEST BANK | COMPLETE 670
REAL EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES
ALREADY GRADED A+| D115 ADVANCED
PATHOPHYSIOLOGY OA FINAL EXAM PREP (BRAND
NEW!!)
Q1: A 55-year-old male with a 30-year history of hypertension presents with
dyspnea on exertion and peripheral edema. Echocardiogram reveals increased left
ventricular wall thickness without chamber dilation. Which cellular adaptation best
describes this finding?
A) Hyperplasia
B) Atrophy
C) Hypertrophy
D) Metaplasia
Answer: C
Rationale: Hypertrophy is an increase in cell size in response to increased
workload, as seen in the left ventricle of a patient with chronic hypertension. This
adaptation allows the heart to generate more force but eventually leads to impaired
function if the stress persists.
Q2: A patient with chronic gastroesophageal reflux disease develops replacement
of normal stratified squamous epithelium with columnar epithelium in the distal
esophagus. This cellular change is best described as:
A) Dysplasia
B) Metaplasia
C) Anaplasia
1|Page SUCCESS!!!
,D) Hyperplasia
Answer: B
Rationale: Metaplasia is the reversible replacement of one differentiated cell type
with another in response to chronic irritation. In Barrett's esophagus, the normal
squamous epithelium is replaced by columnar epithelium as an adaptive response
to acid exposure, though this increases the risk of adenocarcinoma.
Q3: A 68-year-old female with a history of smoking presents with a non-healing
ulcer on her lower leg. The wound is pale, dry, and painful, with well-demarcated
borders. Which pathophysiological mechanism is most likely responsible?
A) Venous insufficiency
B) Arterial insufficiency
C) Neuropathic changes
D) Pressure injury
Answer: B
Rationale: Arterial insufficiency ulcers are pale, dry, painful, and have well-
demarcated borders due to inadequate arterial blood flow. Venous ulcers are
typically moist and irregular with surrounding hemosiderin staining. Neuropathic
ulcers are painless and located on pressure points.
Q4: A 42-year-old female with systemic lupus erythematosus develops proteinuria,
hematuria, and hypertension. Renal biopsy shows immune complex deposition in
the glomerular basement membrane. Which type of hypersensitivity reaction is
primarily responsible for this glomerulonephritis?
A) Type I hypersensitivity
B) Type II hypersensitivity
C) Type III hypersensitivity
D) Type IV hypersensitivity
Answer: C
2|Page SUCCESS!!!
,Rationale: Systemic lupus erythematosus causes glomerulonephritis through Type
III hypersensitivity, where circulating immune complexes deposit in the
glomerular basement membrane, activating complement and causing inflammation.
Type I is anaphylactic, Type II is cytotoxic, and Type IV is delayed cell-mediated.
Question 5: A 28-year-old male presents with recurrent sinus and pulmonary
infections. Laboratory evaluation reveals low serum IgG, IgA, and IgM levels with
absent antibody response to vaccination. This presentation is most consistent with
which immunodeficiency?
A) Selective IgA deficiency
B) Common variable immunodeficiency
C) Severe combined immunodeficiency
D) Wiskott-Aldrich syndrome
Answer: B
Rationale: Common variable immunodeficiency is characterized by low levels of
all immunoglobulin classes with impaired antibody production, leading to
recurrent sinopulmonary infections. Selective IgA deficiency only affects IgA,
SCID presents in infancy, and Wiskott-Aldrich includes thrombocytopenia and
eczema.
Question 6: A 45-year-old female with rheumatoid arthritis is prescribed
methotrexate. Which mechanism of action makes methotrexate effective in
autoimmune disease?
A) Inhibition of TNF-alpha
B) Inhibition of dihydrofolate reductase
C) Blockade of IL-6 receptors
D) Depletion of B lymphocytes
Answer: B
Rationale: Methotrexate inhibits dihydrofolate reductase, reducing folate
availability and suppressing proliferation of activated lymphocytes. This decreases
3|Page SUCCESS!!!
, the inflammatory response in autoimmune conditions. TNF-alpha inhibitors, IL-6
receptor blockers, and B-cell depleting agents work through different mechanisms.
Question 7: A 60-year-old male with a history of type 2 diabetes presents with
sudden onset of severe chest pain radiating to the jaw, diaphoresis, and nausea.
ECG shows ST-segment elevation in leads V1–V4. Which coronary artery is most
likely occluded?
A) Right coronary artery
B) Left anterior descending artery
C) Left circumflex artery
D) Posterior descending artery
Answer: B
Rationale: ST-segment elevation in leads V1–V4 indicates an anterior wall
myocardial infarction, which is most commonly caused by occlusion of the left
anterior descending artery. The right coronary artery typically affects the inferior
wall (leads II, III, aVF), and the circumflex artery affects the lateral wall.
Question 8: A 72-year-old female with heart failure is prescribed furosemide.
Which electrolyte imbalance is the most significant concern with this medication?
A) Hyperkalemia
B) Hyponatremia
C) Hypokalemia
D) Hypercalcemia
Answer: C
Rationale: Furosemide is a loop diuretic that inhibits sodium and chloride
reabsorption in the ascending loop of Henle, leading to increased potassium
excretion. Hypokalemia is the most significant electrolyte concern and can
precipitate cardiac arrhythmias, especially in patients on digoxin.
4|Page SUCCESS!!!
