NURSING PATHOPHYSIOLOGY — EXAM 4 COMPLETE STUDY
GUIDE 300 QUESTIONS WITH VERIFIED ANSWERS & DETAILED
RATIONALES
Cardiovascular Pathophysiology
1. A patient with long-standing hypertension develops left ventricular
hypertrophy. Which cellular adaptation process best explains this change?
A. Hyperplasia
B. Metaplasia
C. Hypertrophy
D. Atrophy
Correct Answer: C
Rationale: Hypertrophy is an increase in cell size, which occurs in cardiac
myocytes in response to increased workload (pressure overload) from
hypertension. Hyperplasia (increase in cell number) is limited in cardiac muscle,
metaplasia is a reversible change of one cell type to another, and atrophy is a
decrease in cell size.
2. Which neurohormonal mechanism is primarily responsible for sodium and
water retention in heart failure with reduced ejection fraction (HFrEF)?
A. Decreased sympathetic nervous system activity
B. Activation of the renin-angiotensin-aldosterone system (RAAS)
C. Increased release of atrial natriuretic peptide (ANP)
,D. Downregulation of antidiuretic hormone (ADH)
Correct Answer: B
Rationale: In HFrEF, decreased cardiac output triggers compensatory activation of
the RAAS, leading to vasoconstriction and aldosterone-mediated sodium and
water retention, which worsens volume overload. Sympathetic activity increases,
ANP is released in response to stretch but is insufficient, and ADH is typically
elevated.
3. A 55-year-old patient presents with sudden onset of severe, tearing chest pain
radiating to the back. Blood pressure is 190/110 mmHg in the right arm and
160/90 mmHg in the left arm. Which pathophysiologic process is most likely
occurring?
A. Plaque rupture with coronary artery thrombosis
B. Intimal tear with blood dissecting into the aortic media
C. Transmural inflammation of the pericardial sac
D. Spasm of the epicardial coronary arteries
Correct Answer: B
Rationale: The classic presentation of tearing chest pain with interarm blood
pressure discrepancy strongly suggests aortic dissection, which involves an intimal
tear allowing blood to enter and dissect the aortic media.
4. A patient with chronic kidney disease stage 4 develops muscle weakness and
peaked T waves on ECG. Which underlying pathophysiologic change best explains
these findings?
A. Hypocalcemia secondary to vitamin D deficiency
B. Hyperkalemia due to decreased renal excretion
,C. Metabolic alkalosis from excessive bicarbonate reabsorption
D. Hyperphosphatemia causing soft tissue calcification
Correct Answer: B
Rationale: Decreased renal excretion in advanced CKD leads to hyperkalemia,
which classically presents with muscle weakness and peaked T waves on ECG.
5. In the pathophysiology of asthma, which cell type is primarily responsible for
the early-phase bronchoconstrictive response upon exposure to an allergen?
A. Neutrophils
B. Eosinophils
C. Mast cells
D. Macrophages
Correct Answer: C
Rationale: Mast cells degranulate upon allergen exposure, releasing histamine
and leukotrienes that cause immediate bronchoconstriction in the early phase of
an asthma attack.
6. What is the primary pathophysiologic mechanism of diabetic peripheral
neuropathy?
A. Demyelination of peripheral nerves due to autoimmune attack
B. Microvascular ischemia and sorbitol accumulation in nerves
C. Compression of the sciatic nerve at the lumbar spine
D. Direct bacterial invasion of the peripheral nerve endings
, Correct Answer: B
Rationale: Chronic hyperglycemia leads to microvascular damage and polyol
pathway activation, causing sorbitol accumulation and subsequent ischemic nerve
injury.
7. A patient with systemic lupus erythematosus presents with new-onset
proteinuria and hypertension. Which pathophysiologic process is most likely
driving this clinical change?
A. Immune complex deposition in the glomerular basement membrane
B. Direct bacterial infection of the renal tubules
C. Obstruction of the ureters by uric acid crystals
D. Ischemic necrosis of the renal papillae
Correct Answer: A
Rationale: SLE commonly causes lupus nephritis via immune complex deposition
in the glomerular basement membrane, leading to proteinuria and hypertension.
8. A 68-year-old patient with long-standing hypertension develops progressive left
ventricular hypertrophy. The nurse recognizes that cardiac myocytes have
adapted through which cellular process to reduce wall stress?
A. Hypertrophy of cardiac myocytes
B. Atrophy of myocardial fibers
C. Hyperplasia of the ventricular wall
D. Metaplasia of endocardial tissue
Correct Answer: A
GUIDE 300 QUESTIONS WITH VERIFIED ANSWERS & DETAILED
RATIONALES
Cardiovascular Pathophysiology
1. A patient with long-standing hypertension develops left ventricular
hypertrophy. Which cellular adaptation process best explains this change?
A. Hyperplasia
B. Metaplasia
C. Hypertrophy
D. Atrophy
Correct Answer: C
Rationale: Hypertrophy is an increase in cell size, which occurs in cardiac
myocytes in response to increased workload (pressure overload) from
hypertension. Hyperplasia (increase in cell number) is limited in cardiac muscle,
metaplasia is a reversible change of one cell type to another, and atrophy is a
decrease in cell size.
2. Which neurohormonal mechanism is primarily responsible for sodium and
water retention in heart failure with reduced ejection fraction (HFrEF)?
A. Decreased sympathetic nervous system activity
B. Activation of the renin-angiotensin-aldosterone system (RAAS)
C. Increased release of atrial natriuretic peptide (ANP)
,D. Downregulation of antidiuretic hormone (ADH)
Correct Answer: B
Rationale: In HFrEF, decreased cardiac output triggers compensatory activation of
the RAAS, leading to vasoconstriction and aldosterone-mediated sodium and
water retention, which worsens volume overload. Sympathetic activity increases,
ANP is released in response to stretch but is insufficient, and ADH is typically
elevated.
3. A 55-year-old patient presents with sudden onset of severe, tearing chest pain
radiating to the back. Blood pressure is 190/110 mmHg in the right arm and
160/90 mmHg in the left arm. Which pathophysiologic process is most likely
occurring?
A. Plaque rupture with coronary artery thrombosis
B. Intimal tear with blood dissecting into the aortic media
C. Transmural inflammation of the pericardial sac
D. Spasm of the epicardial coronary arteries
Correct Answer: B
Rationale: The classic presentation of tearing chest pain with interarm blood
pressure discrepancy strongly suggests aortic dissection, which involves an intimal
tear allowing blood to enter and dissect the aortic media.
4. A patient with chronic kidney disease stage 4 develops muscle weakness and
peaked T waves on ECG. Which underlying pathophysiologic change best explains
these findings?
A. Hypocalcemia secondary to vitamin D deficiency
B. Hyperkalemia due to decreased renal excretion
,C. Metabolic alkalosis from excessive bicarbonate reabsorption
D. Hyperphosphatemia causing soft tissue calcification
Correct Answer: B
Rationale: Decreased renal excretion in advanced CKD leads to hyperkalemia,
which classically presents with muscle weakness and peaked T waves on ECG.
5. In the pathophysiology of asthma, which cell type is primarily responsible for
the early-phase bronchoconstrictive response upon exposure to an allergen?
A. Neutrophils
B. Eosinophils
C. Mast cells
D. Macrophages
Correct Answer: C
Rationale: Mast cells degranulate upon allergen exposure, releasing histamine
and leukotrienes that cause immediate bronchoconstriction in the early phase of
an asthma attack.
6. What is the primary pathophysiologic mechanism of diabetic peripheral
neuropathy?
A. Demyelination of peripheral nerves due to autoimmune attack
B. Microvascular ischemia and sorbitol accumulation in nerves
C. Compression of the sciatic nerve at the lumbar spine
D. Direct bacterial invasion of the peripheral nerve endings
, Correct Answer: B
Rationale: Chronic hyperglycemia leads to microvascular damage and polyol
pathway activation, causing sorbitol accumulation and subsequent ischemic nerve
injury.
7. A patient with systemic lupus erythematosus presents with new-onset
proteinuria and hypertension. Which pathophysiologic process is most likely
driving this clinical change?
A. Immune complex deposition in the glomerular basement membrane
B. Direct bacterial infection of the renal tubules
C. Obstruction of the ureters by uric acid crystals
D. Ischemic necrosis of the renal papillae
Correct Answer: A
Rationale: SLE commonly causes lupus nephritis via immune complex deposition
in the glomerular basement membrane, leading to proteinuria and hypertension.
8. A 68-year-old patient with long-standing hypertension develops progressive left
ventricular hypertrophy. The nurse recognizes that cardiac myocytes have
adapted through which cellular process to reduce wall stress?
A. Hypertrophy of cardiac myocytes
B. Atrophy of myocardial fibers
C. Hyperplasia of the ventricular wall
D. Metaplasia of endocardial tissue
Correct Answer: A
