WGU D027 Objective Assessment 2
Newest 2026 Actual Exam | D027
Advanced Pathopharmacological
Foundations OA Exam | 100 Real Exam
Questions and Correct Verified Answers
(Graded A+)
1. A patient with chronic hypertension develops an enlarged left ventricle. Which
cellular adaptation best explains this finding?
A. Hyperplasia
B. Atrophy
C. Hypertrophy
D. Metaplasia
Answer: C. Hypertrophy
Rationale: Cardiac myocytes respond to chronic increased workload primarily
through hypertrophy, an increase in cell size. This adaptation allows the
myocardium to generate greater contractile force but can eventually contribute to
heart failure.
2. Which finding most strongly indicates irreversible cellular injury?
A. Mild cellular swelling
B. Fatty change
C. Temporary reduction in ATP production
D. Severe membrane disruption with mitochondrial failure
Answer: D. Severe membrane disruption with mitochondrial failure
,Rationale: Severe plasma-membrane damage, calcium influx, and irreversible
mitochondrial dysfunction are characteristic of irreversible cell injury and
progression toward cell death.
3. Which inflammatory mediator is primarily responsible for vasodilation and
increased vascular permeability during acute inflammation?
A. Albumin
B. Histamine
C. Hemoglobin
D. Insulin
Answer: B. Histamine
Rationale: Histamine released from mast cells causes arteriolar vasodilation and
increases vascular permeability, contributing to redness, warmth, and edema.
4. A patient develops wheezing, urticaria, hypotension, and airway swelling
minutes after exposure to an allergen. Which mechanism is most likely
responsible?
A. Type II hypersensitivity
B. Type III hypersensitivity
C. Type IV hypersensitivity
D. Type I hypersensitivity
Answer: D. Type I hypersensitivity
Rationale: Type I hypersensitivity is an immediate, IgE-mediated reaction
involving mast-cell degranulation. Anaphylaxis is a severe systemic example.
5. Which electrolyte abnormality creates the greatest immediate risk for life-
threatening cardiac dysrhythmias?
A. Mild hyponatremia
B. Mild hypocalcemia
C. Severe hyperkalemia
D. Mild hyperphosphatemia
Answer: C. Severe hyperkalemia
,Rationale: Potassium strongly influences cardiac membrane excitability. Severe
hyperkalemia can cause conduction abnormalities, ventricular dysrhythmias, and
cardiac arrest.
6. A patient has a serum sodium of 122 mEq/L and develops confusion and
seizures. Which mechanism best explains the neurologic manifestations?
A. Cerebral dehydration
B. Water movement into brain cells causing cerebral edema
C. Increased intracellular potassium
D. Increased plasma oncotic pressure
Answer: B. Water movement into brain cells causing cerebral edema
Rationale: Severe hyponatremia lowers extracellular osmolality, causing water to
move into cells. In the brain, this can produce cerebral edema and neurologic
symptoms.
7. Which acid-base disorder is expected in a patient with prolonged vomiting?
A. Metabolic acidosis
B. Respiratory acidosis
C. Metabolic alkalosis
D. Respiratory alkalosis
Answer: C. Metabolic alkalosis
Rationale: Persistent vomiting causes loss of gastric hydrochloric acid, increasing
serum bicarbonate relative to hydrogen ions and producing metabolic alkalosis.
8. A patient with diabetic ketoacidosis has a pH of 7.20 and decreased bicarbonate.
Which compensatory response should occur?
A. Decreased respiratory rate
B. Renal retention of hydrogen ions
C. Increased ventilation to eliminate carbon dioxide
D. Increased bicarbonate excretion
Answer: C. Increased ventilation to eliminate carbon dioxide
, Rationale: Metabolic acidosis stimulates hyperventilation, which decreases PaCO₂
and partially compensates for the low bicarbonate concentration.
9. Which mechanism is characteristic of type 1 diabetes mellitus?
A. Increased insulin production
B. Peripheral insulin resistance alone
C. Autoimmune destruction of pancreatic beta cells
D. Excessive glucagon receptor activity only
Answer: C. Autoimmune destruction of pancreatic beta cells
Rationale: Type 1 diabetes results from destruction of pancreatic beta cells,
producing an absolute deficiency of endogenous insulin.
10. Which finding is most characteristic of diabetic ketoacidosis?
A. Severe metabolic alkalosis
B. Elevated anion gap metabolic acidosis
C. Low serum ketones
D. Respiratory acidosis without metabolic abnormalities
Answer: B. Elevated anion gap metabolic acidosis
Rationale: Insulin deficiency promotes lipolysis and ketone production.
Accumulation of ketoacids produces an elevated anion gap metabolic acidosis.
11. Which medication class directly reduces hepatic cholesterol synthesis?
A. Bile-acid sequestrants
B. PCSK9 inhibitors
C. HMG-CoA reductase inhibitors
D. Fibrates
Answer: C. HMG-CoA reductase inhibitors
Rationale: Statins inhibit HMG-CoA reductase, the rate-limiting enzyme in hepatic
cholesterol synthesis, thereby lowering LDL cholesterol.
12. Which adverse effect should be emphasized when teaching a patient taking a
statin?
Newest 2026 Actual Exam | D027
Advanced Pathopharmacological
Foundations OA Exam | 100 Real Exam
Questions and Correct Verified Answers
(Graded A+)
1. A patient with chronic hypertension develops an enlarged left ventricle. Which
cellular adaptation best explains this finding?
A. Hyperplasia
B. Atrophy
C. Hypertrophy
D. Metaplasia
Answer: C. Hypertrophy
Rationale: Cardiac myocytes respond to chronic increased workload primarily
through hypertrophy, an increase in cell size. This adaptation allows the
myocardium to generate greater contractile force but can eventually contribute to
heart failure.
2. Which finding most strongly indicates irreversible cellular injury?
A. Mild cellular swelling
B. Fatty change
C. Temporary reduction in ATP production
D. Severe membrane disruption with mitochondrial failure
Answer: D. Severe membrane disruption with mitochondrial failure
,Rationale: Severe plasma-membrane damage, calcium influx, and irreversible
mitochondrial dysfunction are characteristic of irreversible cell injury and
progression toward cell death.
3. Which inflammatory mediator is primarily responsible for vasodilation and
increased vascular permeability during acute inflammation?
A. Albumin
B. Histamine
C. Hemoglobin
D. Insulin
Answer: B. Histamine
Rationale: Histamine released from mast cells causes arteriolar vasodilation and
increases vascular permeability, contributing to redness, warmth, and edema.
4. A patient develops wheezing, urticaria, hypotension, and airway swelling
minutes after exposure to an allergen. Which mechanism is most likely
responsible?
A. Type II hypersensitivity
B. Type III hypersensitivity
C. Type IV hypersensitivity
D. Type I hypersensitivity
Answer: D. Type I hypersensitivity
Rationale: Type I hypersensitivity is an immediate, IgE-mediated reaction
involving mast-cell degranulation. Anaphylaxis is a severe systemic example.
5. Which electrolyte abnormality creates the greatest immediate risk for life-
threatening cardiac dysrhythmias?
A. Mild hyponatremia
B. Mild hypocalcemia
C. Severe hyperkalemia
D. Mild hyperphosphatemia
Answer: C. Severe hyperkalemia
,Rationale: Potassium strongly influences cardiac membrane excitability. Severe
hyperkalemia can cause conduction abnormalities, ventricular dysrhythmias, and
cardiac arrest.
6. A patient has a serum sodium of 122 mEq/L and develops confusion and
seizures. Which mechanism best explains the neurologic manifestations?
A. Cerebral dehydration
B. Water movement into brain cells causing cerebral edema
C. Increased intracellular potassium
D. Increased plasma oncotic pressure
Answer: B. Water movement into brain cells causing cerebral edema
Rationale: Severe hyponatremia lowers extracellular osmolality, causing water to
move into cells. In the brain, this can produce cerebral edema and neurologic
symptoms.
7. Which acid-base disorder is expected in a patient with prolonged vomiting?
A. Metabolic acidosis
B. Respiratory acidosis
C. Metabolic alkalosis
D. Respiratory alkalosis
Answer: C. Metabolic alkalosis
Rationale: Persistent vomiting causes loss of gastric hydrochloric acid, increasing
serum bicarbonate relative to hydrogen ions and producing metabolic alkalosis.
8. A patient with diabetic ketoacidosis has a pH of 7.20 and decreased bicarbonate.
Which compensatory response should occur?
A. Decreased respiratory rate
B. Renal retention of hydrogen ions
C. Increased ventilation to eliminate carbon dioxide
D. Increased bicarbonate excretion
Answer: C. Increased ventilation to eliminate carbon dioxide
, Rationale: Metabolic acidosis stimulates hyperventilation, which decreases PaCO₂
and partially compensates for the low bicarbonate concentration.
9. Which mechanism is characteristic of type 1 diabetes mellitus?
A. Increased insulin production
B. Peripheral insulin resistance alone
C. Autoimmune destruction of pancreatic beta cells
D. Excessive glucagon receptor activity only
Answer: C. Autoimmune destruction of pancreatic beta cells
Rationale: Type 1 diabetes results from destruction of pancreatic beta cells,
producing an absolute deficiency of endogenous insulin.
10. Which finding is most characteristic of diabetic ketoacidosis?
A. Severe metabolic alkalosis
B. Elevated anion gap metabolic acidosis
C. Low serum ketones
D. Respiratory acidosis without metabolic abnormalities
Answer: B. Elevated anion gap metabolic acidosis
Rationale: Insulin deficiency promotes lipolysis and ketone production.
Accumulation of ketoacids produces an elevated anion gap metabolic acidosis.
11. Which medication class directly reduces hepatic cholesterol synthesis?
A. Bile-acid sequestrants
B. PCSK9 inhibitors
C. HMG-CoA reductase inhibitors
D. Fibrates
Answer: C. HMG-CoA reductase inhibitors
Rationale: Statins inhibit HMG-CoA reductase, the rate-limiting enzyme in hepatic
cholesterol synthesis, thereby lowering LDL cholesterol.
12. Which adverse effect should be emphasized when teaching a patient taking a
statin?
