NR 546 Advanced Pathophysiology Final Exam | Questions with
Correct Answers | Verified 2026/2027
Question 1
A client is diagnosed with metaplasia in the bronchial epithelium. The
nurse recognizes that this cellular adaptation:
• A. Is an irreversible process indicating imminent malignancy.
• B. Represents the replacement of one mature cell type with
another, often in response to chronic irritation.
• C. Results in a significant increase in the rate of DNA replication
and cell division.
• D. Is the direct result of a lack of oxygen to the bronchial tissue.
Correct Answer: B. Represents the replacement of one mature cell type
with another, often in response to chronic irritation.
Detailed Rationale: Metaplasia is a reversible cellular adaptation where
one adult cell type is replaced by another, usually better suited to
survive a stressor (e.g., columnar epithelium changing to squamous
epithelium in smokers).
Question 2
Which mechanism best describes the pathophysiology of Type I
Hypersensitivity reactions?
• A. Formation of antigen-antibody immune complexes that deposit
in blood vessel walls.
• B. T-cell mediated delayed reaction causing tissue destruction.
, • C. IgE-mediated release of histamine and other inflammatory
mediators from mast cells.
• D. Antibodies directed against cell surface antigens.
Correct Answer: C. IgE-mediated release of histamine and other
inflammatory mediators from mast cells.
Detailed Rationale: Type I hypersensitivity involves IgE antibodies
binding to mast cells; subsequent exposure to the antigen triggers
degranulation, releasing histamine and causing immediate
inflammatory symptoms.
Question 3
A patient with chronic kidney disease (CKD) presents with anemia.
What is the primary pathophysiological mechanism causing this finding?
• A. Decreased production of erythropoietin by the kidneys.
• B. Increased destruction of red blood cells in the spleen.
• C. Deficiency of dietary iron absorption in the gut.
• D. Bone marrow suppression due to metabolic acidosis.
Correct Answer: A. Decreased production of erythropoietin by the
kidneys.
Detailed Rationale: The peritubular cells in the kidney produce
erythropoietin, which stimulates the bone marrow to produce RBCs. In
CKD, this production is impaired, leading to normocytic, normochromic
anemia.
Question 4
,Which of the following describes the role of the RAAS pathway in a
patient with heart failure?
• A. It causes vasodilation to decrease the workload on the heart.
• B. It promotes the excretion of sodium and water to reduce blood
volume.
• C. It triggers vasoconstriction and sodium/water retention,
ultimately worsening ventricular remodeling.
• D. It directly stimulates the parasympathetic nervous system to
decrease heart rate.
Correct Answer: C. It triggers vasoconstriction and sodium/water
retention, ultimately worsening ventricular remodeling.
Detailed Rationale: The Renin-Angiotensin-Aldosterone System (RAAS)
is chronically activated in heart failure. Angiotensin II causes
vasoconstriction and aldosterone causes fluid retention; while
compensatory initially, chronic activation leads to detrimental cardiac
hypertrophy and remodeling.
Question 5
In the context of tumor biology, what is the significance of
angiogenesis?
• A. It is the process by which tumors acquire the ability to invade
surrounding tissues.
• B. It refers to the formation of new blood vessels that provide the
tumor with oxygen and nutrients for growth.
, • C. It is a protective mechanism where the host immune system
creates a barrier around the tumor.
• D. It involves the mutation of proto-oncogenes into tumor
suppressor genes.
Correct Answer: B. It refers to the formation of new blood vessels that
provide the tumor with oxygen and nutrients for growth.
Detailed Rationale: Angiogenesis is essential for tumor progression
beyond a certain size ($1\text{--}2\text{ mm}$), as it allows the tumor
to secure a blood supply, facilitating growth and potential metastasis.
Question 6
A client with diabetes mellitus develops peripheral neuropathy. Which
pathophysiological change is the most likely cause?
• A. Direct damage to the myelin sheath caused by
hyperinsulinemia.
• B. Microvascular changes and the accumulation of sorbitol via the
polyol pathway.
• C. Excessive protein synthesis leading to neuronal hypertrophy.
• D. Decreased intracellular glucose leading to neuronal starvation.
Correct Answer: B. Microvascular changes and the accumulation of
sorbitol via the polyol pathway.
Detailed Rationale: Chronic hyperglycemia leads to the accumulation of
sorbitol (via the polyol pathway), which damages nerves and osmotic
balance, alongside microvascular ischemia that damages the vasa
nervorum (blood supply to nerves).
Correct Answers | Verified 2026/2027
Question 1
A client is diagnosed with metaplasia in the bronchial epithelium. The
nurse recognizes that this cellular adaptation:
• A. Is an irreversible process indicating imminent malignancy.
• B. Represents the replacement of one mature cell type with
another, often in response to chronic irritation.
• C. Results in a significant increase in the rate of DNA replication
and cell division.
• D. Is the direct result of a lack of oxygen to the bronchial tissue.
Correct Answer: B. Represents the replacement of one mature cell type
with another, often in response to chronic irritation.
Detailed Rationale: Metaplasia is a reversible cellular adaptation where
one adult cell type is replaced by another, usually better suited to
survive a stressor (e.g., columnar epithelium changing to squamous
epithelium in smokers).
Question 2
Which mechanism best describes the pathophysiology of Type I
Hypersensitivity reactions?
• A. Formation of antigen-antibody immune complexes that deposit
in blood vessel walls.
• B. T-cell mediated delayed reaction causing tissue destruction.
, • C. IgE-mediated release of histamine and other inflammatory
mediators from mast cells.
• D. Antibodies directed against cell surface antigens.
Correct Answer: C. IgE-mediated release of histamine and other
inflammatory mediators from mast cells.
Detailed Rationale: Type I hypersensitivity involves IgE antibodies
binding to mast cells; subsequent exposure to the antigen triggers
degranulation, releasing histamine and causing immediate
inflammatory symptoms.
Question 3
A patient with chronic kidney disease (CKD) presents with anemia.
What is the primary pathophysiological mechanism causing this finding?
• A. Decreased production of erythropoietin by the kidneys.
• B. Increased destruction of red blood cells in the spleen.
• C. Deficiency of dietary iron absorption in the gut.
• D. Bone marrow suppression due to metabolic acidosis.
Correct Answer: A. Decreased production of erythropoietin by the
kidneys.
Detailed Rationale: The peritubular cells in the kidney produce
erythropoietin, which stimulates the bone marrow to produce RBCs. In
CKD, this production is impaired, leading to normocytic, normochromic
anemia.
Question 4
,Which of the following describes the role of the RAAS pathway in a
patient with heart failure?
• A. It causes vasodilation to decrease the workload on the heart.
• B. It promotes the excretion of sodium and water to reduce blood
volume.
• C. It triggers vasoconstriction and sodium/water retention,
ultimately worsening ventricular remodeling.
• D. It directly stimulates the parasympathetic nervous system to
decrease heart rate.
Correct Answer: C. It triggers vasoconstriction and sodium/water
retention, ultimately worsening ventricular remodeling.
Detailed Rationale: The Renin-Angiotensin-Aldosterone System (RAAS)
is chronically activated in heart failure. Angiotensin II causes
vasoconstriction and aldosterone causes fluid retention; while
compensatory initially, chronic activation leads to detrimental cardiac
hypertrophy and remodeling.
Question 5
In the context of tumor biology, what is the significance of
angiogenesis?
• A. It is the process by which tumors acquire the ability to invade
surrounding tissues.
• B. It refers to the formation of new blood vessels that provide the
tumor with oxygen and nutrients for growth.
, • C. It is a protective mechanism where the host immune system
creates a barrier around the tumor.
• D. It involves the mutation of proto-oncogenes into tumor
suppressor genes.
Correct Answer: B. It refers to the formation of new blood vessels that
provide the tumor with oxygen and nutrients for growth.
Detailed Rationale: Angiogenesis is essential for tumor progression
beyond a certain size ($1\text{--}2\text{ mm}$), as it allows the tumor
to secure a blood supply, facilitating growth and potential metastasis.
Question 6
A client with diabetes mellitus develops peripheral neuropathy. Which
pathophysiological change is the most likely cause?
• A. Direct damage to the myelin sheath caused by
hyperinsulinemia.
• B. Microvascular changes and the accumulation of sorbitol via the
polyol pathway.
• C. Excessive protein synthesis leading to neuronal hypertrophy.
• D. Decreased intracellular glucose leading to neuronal starvation.
Correct Answer: B. Microvascular changes and the accumulation of
sorbitol via the polyol pathway.
Detailed Rationale: Chronic hyperglycemia leads to the accumulation of
sorbitol (via the polyol pathway), which damages nerves and osmotic
balance, alongside microvascular ischemia that damages the vasa
nervorum (blood supply to nerves).
