WGU D027 Advanced Pathopharmacological
Foundations Test Bank Actual Questions & Study
Guide | INSTANT PDF DOWNLOAD.
Question 1
A 65-year-old with chronic heart failure (HFrEF, EF 35%) presents with worsening
dyspnea, fatigue, and 3-kg weight gain over 2 days. Current medications: lisinopril 20
mg daily, metoprolol succinate 100 mg daily, furosemide 40 mg daily. Which
pathophysiological mechanism is most likely driving this exacerbation?
A) Increased afterload from hypertension
B) Activation of the renin-angiotensin-aldosterone system (RAAS)
C) Reduced myocardial contractility from beta-blocker toxicity
D) Pulmonary embolism
Answer: B
In chronic HFrEF, RAAS activation leads to sodium and water retention, worsening volume
overload despite loop diuretics. Increased afterload (A) contributes but is not the primary
driver of acute decompensation. Beta-blockers (C) improve outcomes and do not cause
acute toxicity at this dose. PE (D) is a differential but less likely without risk factors or
hypoxia.
Question 2
A 55-year-old with type 2 diabetes (HbA1c 8.5%) on metformin 2000 mg daily is started
on empagliflozin. Which adverse effect requires immediate patient education and
monitoring?
A) Hypoglycemia
B) Euglycemic diabetic ketoacidosis (DKA)
C) Weight gain
D) Hyperkalemia
,Answer: B
SGLT2 inhibitors (empagliflozin, canagliflozin, dapagliflozin) can cause euglycemic DKA
(normal or mildly elevated glucose with metabolic acidosis and ketones). Patients should
be advised to hold the medication during illness, surgery, or reduced oral intake.
Hypoglycemia (A) is less common without insulin or sulfonylureas. Weight loss (not gain,
C) occurs. Hyperkalemia (D) is not typical.
Question 3
A 70-year-old with chronic kidney disease stage 4 (eGFR 25 mL/min) presents with
fatigue, bone pain, and serum calcium 8.0 mg/dL, phosphorus 6.5 mg/dL, PTH 450
pg/mL. Which pathophysiological process best explains these findings?
A) Vitamin D deficiency
B) Secondary hyperparathyroidism from phosphate retention
C) Primary hyperparathyroidism
D) Malignancy-related hypercalcemia
Answer: B
In CKD, declining GFR leads to phosphate retention, which stimulates fibroblast growth
factor 23 (FGF23) and causes secondary hyperparathyroidism. PTH rises to maintain
normal calcium but results in bone disease (renal osteodystrophy). Vitamin D deficiency
(A) may coexist but is not the primary driver. Primary hyperparathyroidism (C) would
show high calcium. Malignancy (D) causes hypercalcemia, not hypocalcemia.
Question 4
A 45-year-old with rheumatoid arthritis on methotrexate 20 mg weekly and folic acid
presents with new dyspnea, nonproductive cough, and hypoxemia. Chest HRCT shows
diffuse ground-glass opacities. Which medication-related complication is most likely?
A) Methotrexate-induced pneumonitis
B) Folic acid toxicity
C) Rheumatoid arthritis-related interstitial lung disease
D) Opportunistic infection
,Answer: A
Methotrexate can cause acute or subacute pneumonitis (hypersensitivity reaction) with
dyspnea, cough, fever, and ground-glass opacities. Treatment includes drug
discontinuation and corticosteroids. Folic acid (B) prevents methotrexate toxicity, not
causes it. RA-ILD (C) is usually more indolent. Infection (D) remains possible but less likely
without fever or immunocompromise severity.
Question 5
A 60-year-old with atrial fibrillation on warfarin (INR 2.5) presents with acute onset of
severe left leg pain, pallor, paresthesia, and pulselessness. Which pathophysiological
event is most likely?
A) Arterial thromboembolism from left atrial appendage
B) Deep vein thrombosis with phlegmasia cerulea dolens
C) Warfarin-induced skin necrosis
D) Acute limb ischemia from atherosclerosis
Answer: A
*In atrial fibrillation, thrombi form in the left atrial appendage and can embolize
systemically. Sudden limb ischemia with the "6 Ps" (pain, pallor, paresthesia,
pulselessness, poikilothermia, paralysis) indicates arterial embolism. DVT (B) causes
swelling, not pallor/pulselessness. Warfarin necrosis (C) occurs early in therapy (days 3-
6) with protein C deficiency. Atherosclerotic occlusion (D) is usually more gradual.*
Question 6
A 30-year-old with sickle cell disease presents with severe back and chest pain, fever,
and hypoxia. Chest X-ray shows a new right lower lobe infiltrate. Which
pathophysiological process is the primary cause of this presentation?
A) Bacterial pneumonia
B) Acute chest syndrome from pulmonary vaso-occlusion
C) Pulmonary embolism
D) Fat embolism syndrome
, Answer: B
Acute chest syndrome in sickle cell disease results from pulmonary vaso-occlusion of
sickled erythrocytes, leading to infarction, inflammation, and infection (often atypical
organisms). It presents with chest pain, fever, hypoxia, and new infiltrate. Bacterial
pneumonia (A) can occur but is often a complication, not the primary driver. PE (C) and fat
embolism (D) are less likely without trauma or DVT.
Question 7
A 50-year-old with hypertension and diabetes presents with nausea, vomiting, diffuse
abdominal pain, and serum bicarbonate 12 mEq/L, anion gap 25, osmolal gap 15. Which
toxin ingestion is most likely?
A) Methanol
B) Ethylene glycol
C) Salicylates
D) Isoniazid
Answer: B
Ethylene glycol (antifreeze) causes high anion gap metabolic acidosis with elevated
osmolal gap, plus neurologic symptoms and renal failure (calcium oxalate crystals).
Methanol (A) causes visual symptoms. Salicylates (C) cause respiratory alkalosis then
mixed disorder. Isoniazid (D) causes seizures and lactic acidosis without osmolal gap.
Question 8
A 65-year-old with Parkinson's disease on carbidopa-levodopa reports that his
medication "wears off" 1 hour before the next dose, causing freezing and difficulty
walking. Which pharmacologic adjustment is most appropriate?
A) Increase carbidopa-levodopa dose
B) Add entacapone
C) Switch to pramipexole
D) Add benztropine
Foundations Test Bank Actual Questions & Study
Guide | INSTANT PDF DOWNLOAD.
Question 1
A 65-year-old with chronic heart failure (HFrEF, EF 35%) presents with worsening
dyspnea, fatigue, and 3-kg weight gain over 2 days. Current medications: lisinopril 20
mg daily, metoprolol succinate 100 mg daily, furosemide 40 mg daily. Which
pathophysiological mechanism is most likely driving this exacerbation?
A) Increased afterload from hypertension
B) Activation of the renin-angiotensin-aldosterone system (RAAS)
C) Reduced myocardial contractility from beta-blocker toxicity
D) Pulmonary embolism
Answer: B
In chronic HFrEF, RAAS activation leads to sodium and water retention, worsening volume
overload despite loop diuretics. Increased afterload (A) contributes but is not the primary
driver of acute decompensation. Beta-blockers (C) improve outcomes and do not cause
acute toxicity at this dose. PE (D) is a differential but less likely without risk factors or
hypoxia.
Question 2
A 55-year-old with type 2 diabetes (HbA1c 8.5%) on metformin 2000 mg daily is started
on empagliflozin. Which adverse effect requires immediate patient education and
monitoring?
A) Hypoglycemia
B) Euglycemic diabetic ketoacidosis (DKA)
C) Weight gain
D) Hyperkalemia
,Answer: B
SGLT2 inhibitors (empagliflozin, canagliflozin, dapagliflozin) can cause euglycemic DKA
(normal or mildly elevated glucose with metabolic acidosis and ketones). Patients should
be advised to hold the medication during illness, surgery, or reduced oral intake.
Hypoglycemia (A) is less common without insulin or sulfonylureas. Weight loss (not gain,
C) occurs. Hyperkalemia (D) is not typical.
Question 3
A 70-year-old with chronic kidney disease stage 4 (eGFR 25 mL/min) presents with
fatigue, bone pain, and serum calcium 8.0 mg/dL, phosphorus 6.5 mg/dL, PTH 450
pg/mL. Which pathophysiological process best explains these findings?
A) Vitamin D deficiency
B) Secondary hyperparathyroidism from phosphate retention
C) Primary hyperparathyroidism
D) Malignancy-related hypercalcemia
Answer: B
In CKD, declining GFR leads to phosphate retention, which stimulates fibroblast growth
factor 23 (FGF23) and causes secondary hyperparathyroidism. PTH rises to maintain
normal calcium but results in bone disease (renal osteodystrophy). Vitamin D deficiency
(A) may coexist but is not the primary driver. Primary hyperparathyroidism (C) would
show high calcium. Malignancy (D) causes hypercalcemia, not hypocalcemia.
Question 4
A 45-year-old with rheumatoid arthritis on methotrexate 20 mg weekly and folic acid
presents with new dyspnea, nonproductive cough, and hypoxemia. Chest HRCT shows
diffuse ground-glass opacities. Which medication-related complication is most likely?
A) Methotrexate-induced pneumonitis
B) Folic acid toxicity
C) Rheumatoid arthritis-related interstitial lung disease
D) Opportunistic infection
,Answer: A
Methotrexate can cause acute or subacute pneumonitis (hypersensitivity reaction) with
dyspnea, cough, fever, and ground-glass opacities. Treatment includes drug
discontinuation and corticosteroids. Folic acid (B) prevents methotrexate toxicity, not
causes it. RA-ILD (C) is usually more indolent. Infection (D) remains possible but less likely
without fever or immunocompromise severity.
Question 5
A 60-year-old with atrial fibrillation on warfarin (INR 2.5) presents with acute onset of
severe left leg pain, pallor, paresthesia, and pulselessness. Which pathophysiological
event is most likely?
A) Arterial thromboembolism from left atrial appendage
B) Deep vein thrombosis with phlegmasia cerulea dolens
C) Warfarin-induced skin necrosis
D) Acute limb ischemia from atherosclerosis
Answer: A
*In atrial fibrillation, thrombi form in the left atrial appendage and can embolize
systemically. Sudden limb ischemia with the "6 Ps" (pain, pallor, paresthesia,
pulselessness, poikilothermia, paralysis) indicates arterial embolism. DVT (B) causes
swelling, not pallor/pulselessness. Warfarin necrosis (C) occurs early in therapy (days 3-
6) with protein C deficiency. Atherosclerotic occlusion (D) is usually more gradual.*
Question 6
A 30-year-old with sickle cell disease presents with severe back and chest pain, fever,
and hypoxia. Chest X-ray shows a new right lower lobe infiltrate. Which
pathophysiological process is the primary cause of this presentation?
A) Bacterial pneumonia
B) Acute chest syndrome from pulmonary vaso-occlusion
C) Pulmonary embolism
D) Fat embolism syndrome
, Answer: B
Acute chest syndrome in sickle cell disease results from pulmonary vaso-occlusion of
sickled erythrocytes, leading to infarction, inflammation, and infection (often atypical
organisms). It presents with chest pain, fever, hypoxia, and new infiltrate. Bacterial
pneumonia (A) can occur but is often a complication, not the primary driver. PE (C) and fat
embolism (D) are less likely without trauma or DVT.
Question 7
A 50-year-old with hypertension and diabetes presents with nausea, vomiting, diffuse
abdominal pain, and serum bicarbonate 12 mEq/L, anion gap 25, osmolal gap 15. Which
toxin ingestion is most likely?
A) Methanol
B) Ethylene glycol
C) Salicylates
D) Isoniazid
Answer: B
Ethylene glycol (antifreeze) causes high anion gap metabolic acidosis with elevated
osmolal gap, plus neurologic symptoms and renal failure (calcium oxalate crystals).
Methanol (A) causes visual symptoms. Salicylates (C) cause respiratory alkalosis then
mixed disorder. Isoniazid (D) causes seizures and lactic acidosis without osmolal gap.
Question 8
A 65-year-old with Parkinson's disease on carbidopa-levodopa reports that his
medication "wears off" 1 hour before the next dose, causing freezing and difficulty
walking. Which pharmacologic adjustment is most appropriate?
A) Increase carbidopa-levodopa dose
B) Add entacapone
C) Switch to pramipexole
D) Add benztropine
