WGU D027 Advanced Pathopharmacological Foundations
Exam Prep 2026 | 200 Practice Questions with Answers &
Rationales | Assessment Guide
Section 1: Cellular & Molecular Pathophysiology (Questions 1–20)
1. A patient with chronic heart failure has decreased cardiac output leading to activation of the
renin‑angiotensin‑aldosterone system (RAAS). Which of the following is a direct effect of angiotensin II?
A. Decreased systemic vascular resistance
B. Increased sodium and water excretion
C. Vasoconstriction and aldosterone release
D. Decreased blood pressure
Answer: C
Rationale: Angiotensin II is a potent vasoconstrictor and stimulates aldosterone secretion, leading to
sodium and water retention, increased blood volume, and increased blood pressure.
2. Which statement best describes apoptosis?
A. Uncontrolled cell death due to injury
B. Programmed cell death without inflammation
C. Cell death caused by hypoxia
D. Necrosis with inflammatory response
Answer: B
Rationale: Apoptosis is genetically programmed cell death that occurs in a controlled manner, typically
without triggering an inflammatory response.
3. A patient has a mutation in the CFTR gene leading to defective chloride channels. This is the
underlying cause of:
A. Sickle cell anemia
,B. Cystic fibrosis
C. Huntington’s disease
D. Marfan syndrome
Answer: B
Rationale: Cystic fibrosis is caused by mutations in the CFTR gene, resulting in abnormal chloride
transport and thick mucus secretions.
4. True or False: The inflammatory response is always harmful and should be completely suppressed.
Answer: False
Rationale: Inflammation is a protective response to injury or infection. It helps eliminate pathogens and
initiate tissue repair; only chronic or excessive inflammation is harmful.
5. Which type of hypersensitivity reaction is mediated by IgE antibodies and mast cells, as seen in
allergic rhinitis?
A. Type I
B. Type II
C. Type III
D. Type IV
Answer: A
Rationale: Type I hypersensitivity is IgE‑mediated and involves mast cell degranulation, leading to
immediate allergic reactions.
6. A patient with systemic lupus erythematosus (SLE) has tissue damage caused by immune complexes
depositing in small vessels. This represents which type of hypersensitivity?
A. Type I
B. Type II
C. Type III
D. Type IV
,Answer: C
Rationale: Type III hypersensitivity involves immune complex deposition (antigen‑antibody complexes)
leading to complement activation and tissue damage, as seen in SLE and serum sickness.
7. The process of programmed cell death that occurs during normal development and tissue
homeostasis is called:
A. Necrosis
B. Apoptosis
C. Autophagy
D. Pyroptosis
Answer: B
Rationale: Apoptosis is essential for normal development (e.g., removing webbing between digits) and
for eliminating damaged or old cells without inflammation.
8. Which cellular change is characteristic of reversible cell injury?
A. Nuclear pyknosis
B. Cellular swelling and fatty change
C. Karyorrhexis
D. Karyolysis
Answer: B
Rationale: Reversible injury is marked by cellular swelling and fatty change (lipid accumulation). Nuclear
changes (pyknosis, karyorrhexis, karyolysis) indicate irreversible injury.
9. A patient with a tumor that has cells that resemble the tissue of origin but are disorganized would be
described as:
A. Anaplastic
B. Dysplastic
, C. Well‑differentiated
D. Metaplastic
Answer: C
Rationale: Well‑differentiated tumors have cells that closely resemble the normal tissue of origin.
Anaplastic tumors are poorly differentiated and highly malignant.
10. Which second messenger is activated by binding of epinephrine to beta‑1 adrenergic receptors in
the heart?
A. cAMP
B. IP3
C. DAG
D. Calcium
Answer: A
Rationale: Beta‑1 adrenergic receptors are Gs‑coupled, leading to activation of adenylyl cyclase and
increased intracellular cAMP.
11. True or False: Metastasis requires that tumor cells invade blood vessels or lymphatics, survive in
circulation, and establish growth at a distant site.
Answer: True
Rationale: Metastasis is a multi‑step process including local invasion, intravasation, circulation survival,
extravasation, and proliferation at a secondary site.
12. Which of the following is a tumor suppressor gene that is commonly mutated in many cancers and is
known as the “guardian of the genome”?
A. Ras
B. Myc
C. TP53 (p53)
D. EGFR
Exam Prep 2026 | 200 Practice Questions with Answers &
Rationales | Assessment Guide
Section 1: Cellular & Molecular Pathophysiology (Questions 1–20)
1. A patient with chronic heart failure has decreased cardiac output leading to activation of the
renin‑angiotensin‑aldosterone system (RAAS). Which of the following is a direct effect of angiotensin II?
A. Decreased systemic vascular resistance
B. Increased sodium and water excretion
C. Vasoconstriction and aldosterone release
D. Decreased blood pressure
Answer: C
Rationale: Angiotensin II is a potent vasoconstrictor and stimulates aldosterone secretion, leading to
sodium and water retention, increased blood volume, and increased blood pressure.
2. Which statement best describes apoptosis?
A. Uncontrolled cell death due to injury
B. Programmed cell death without inflammation
C. Cell death caused by hypoxia
D. Necrosis with inflammatory response
Answer: B
Rationale: Apoptosis is genetically programmed cell death that occurs in a controlled manner, typically
without triggering an inflammatory response.
3. A patient has a mutation in the CFTR gene leading to defective chloride channels. This is the
underlying cause of:
A. Sickle cell anemia
,B. Cystic fibrosis
C. Huntington’s disease
D. Marfan syndrome
Answer: B
Rationale: Cystic fibrosis is caused by mutations in the CFTR gene, resulting in abnormal chloride
transport and thick mucus secretions.
4. True or False: The inflammatory response is always harmful and should be completely suppressed.
Answer: False
Rationale: Inflammation is a protective response to injury or infection. It helps eliminate pathogens and
initiate tissue repair; only chronic or excessive inflammation is harmful.
5. Which type of hypersensitivity reaction is mediated by IgE antibodies and mast cells, as seen in
allergic rhinitis?
A. Type I
B. Type II
C. Type III
D. Type IV
Answer: A
Rationale: Type I hypersensitivity is IgE‑mediated and involves mast cell degranulation, leading to
immediate allergic reactions.
6. A patient with systemic lupus erythematosus (SLE) has tissue damage caused by immune complexes
depositing in small vessels. This represents which type of hypersensitivity?
A. Type I
B. Type II
C. Type III
D. Type IV
,Answer: C
Rationale: Type III hypersensitivity involves immune complex deposition (antigen‑antibody complexes)
leading to complement activation and tissue damage, as seen in SLE and serum sickness.
7. The process of programmed cell death that occurs during normal development and tissue
homeostasis is called:
A. Necrosis
B. Apoptosis
C. Autophagy
D. Pyroptosis
Answer: B
Rationale: Apoptosis is essential for normal development (e.g., removing webbing between digits) and
for eliminating damaged or old cells without inflammation.
8. Which cellular change is characteristic of reversible cell injury?
A. Nuclear pyknosis
B. Cellular swelling and fatty change
C. Karyorrhexis
D. Karyolysis
Answer: B
Rationale: Reversible injury is marked by cellular swelling and fatty change (lipid accumulation). Nuclear
changes (pyknosis, karyorrhexis, karyolysis) indicate irreversible injury.
9. A patient with a tumor that has cells that resemble the tissue of origin but are disorganized would be
described as:
A. Anaplastic
B. Dysplastic
, C. Well‑differentiated
D. Metaplastic
Answer: C
Rationale: Well‑differentiated tumors have cells that closely resemble the normal tissue of origin.
Anaplastic tumors are poorly differentiated and highly malignant.
10. Which second messenger is activated by binding of epinephrine to beta‑1 adrenergic receptors in
the heart?
A. cAMP
B. IP3
C. DAG
D. Calcium
Answer: A
Rationale: Beta‑1 adrenergic receptors are Gs‑coupled, leading to activation of adenylyl cyclase and
increased intracellular cAMP.
11. True or False: Metastasis requires that tumor cells invade blood vessels or lymphatics, survive in
circulation, and establish growth at a distant site.
Answer: True
Rationale: Metastasis is a multi‑step process including local invasion, intravasation, circulation survival,
extravasation, and proliferation at a secondary site.
12. Which of the following is a tumor suppressor gene that is commonly mutated in many cancers and is
known as the “guardian of the genome”?
A. Ras
B. Myc
C. TP53 (p53)
D. EGFR
