NURS 5220 EXAM 3 - ADVANCED
PATHOPHYSIOLOGY QUESTIONS AND
VERIFIED ANSWERS. JUST RELEASED
1. In the context of Heart Failure with Reduced Ejection Fraction (HFrEF), which of the
following best describes the physiological consequence of chronic activation of the
sympathetic nervous system?
A. Downregulation of beta-1 receptors and increased myocardial oxygen demand
B. Increased myocardial contractility leading to improved long-term cardiac output
C. Decreased systemic vascular resistance due to peripheral vasodilation
D. Inhibition of the renin-angiotensin-aldosterone system
Answer: A
Conceptual Explanation: Chronic sympathetic activation in HFrEF leads to catecholamine
toxicity, beta-receptor downregulation, and increased oxygen demand, which ultimately
worsens ventricular remodeling and failure.
,2. A patient presents with a mid-systolic crescendo-decrescendo murmur at the second right
intercostal space that radiates to the carotid arteries. What is the most likely
pathophysiological adaptation in the left ventricle?
A. Eccentric hypertrophy due to volume overload
B. Concentric hypertrophy due to pressure overload
C. Ventricular dilation with thinning of the myocardial wall
D. Increased compliance to accommodate regurgitant flow
Answer: B
Conceptual Explanation: The murmur describes aortic stenosis, which causes pressure
overload on the left ventricle, leading to concentric hypertrophy (thickening of the wall to
normalize wall stress).
3. Which compensatory mechanism is primarily responsible for the development of
pulmonary edema in a patient with acute left-sided heart failure?
A. Increased pulmonary capillary oncotic pressure
B. Decreased pulmonary capillary hydrostatic pressure
C. Decreased systemic vascular resistance
D. Increased pulmonary capillary hydrostatic pressure
Answer: D
, Conceptual Explanation: Left ventricular failure leads to a backup of blood into the left
atrium and pulmonary veins, increasing pulmonary capillary hydrostatic pressure, which
forces fluid into the interstitial and alveolar spaces.
4. In the renin-angiotensin-aldosterone system (RAAS), which enzyme is responsible for the
conversion of Angiotensin I to Angiotensin II?
A. Renin
B. Aminopeptidase
C. Aldosterone synthase
D. Angiotensin-converting enzyme (ACE)
Answer: D
Conceptual Explanation: ACE, primarily located in the pulmonary vascular endothelium,
converts Angiotensin I to the potent vasoconstrictor Angiotensin II.
5. A patient with chronic kidney disease (CKD) develops secondary hyperparathyroidism.
What is the underlying trigger for this condition?
A. Hypercalcemia and hypophosphatemia
B. Decreased production of erythropoietin
C. Metabolic alkalosis
D. Hypocalcemia and hyperphosphatemia
Answer: D
PATHOPHYSIOLOGY QUESTIONS AND
VERIFIED ANSWERS. JUST RELEASED
1. In the context of Heart Failure with Reduced Ejection Fraction (HFrEF), which of the
following best describes the physiological consequence of chronic activation of the
sympathetic nervous system?
A. Downregulation of beta-1 receptors and increased myocardial oxygen demand
B. Increased myocardial contractility leading to improved long-term cardiac output
C. Decreased systemic vascular resistance due to peripheral vasodilation
D. Inhibition of the renin-angiotensin-aldosterone system
Answer: A
Conceptual Explanation: Chronic sympathetic activation in HFrEF leads to catecholamine
toxicity, beta-receptor downregulation, and increased oxygen demand, which ultimately
worsens ventricular remodeling and failure.
,2. A patient presents with a mid-systolic crescendo-decrescendo murmur at the second right
intercostal space that radiates to the carotid arteries. What is the most likely
pathophysiological adaptation in the left ventricle?
A. Eccentric hypertrophy due to volume overload
B. Concentric hypertrophy due to pressure overload
C. Ventricular dilation with thinning of the myocardial wall
D. Increased compliance to accommodate regurgitant flow
Answer: B
Conceptual Explanation: The murmur describes aortic stenosis, which causes pressure
overload on the left ventricle, leading to concentric hypertrophy (thickening of the wall to
normalize wall stress).
3. Which compensatory mechanism is primarily responsible for the development of
pulmonary edema in a patient with acute left-sided heart failure?
A. Increased pulmonary capillary oncotic pressure
B. Decreased pulmonary capillary hydrostatic pressure
C. Decreased systemic vascular resistance
D. Increased pulmonary capillary hydrostatic pressure
Answer: D
, Conceptual Explanation: Left ventricular failure leads to a backup of blood into the left
atrium and pulmonary veins, increasing pulmonary capillary hydrostatic pressure, which
forces fluid into the interstitial and alveolar spaces.
4. In the renin-angiotensin-aldosterone system (RAAS), which enzyme is responsible for the
conversion of Angiotensin I to Angiotensin II?
A. Renin
B. Aminopeptidase
C. Aldosterone synthase
D. Angiotensin-converting enzyme (ACE)
Answer: D
Conceptual Explanation: ACE, primarily located in the pulmonary vascular endothelium,
converts Angiotensin I to the potent vasoconstrictor Angiotensin II.
5. A patient with chronic kidney disease (CKD) develops secondary hyperparathyroidism.
What is the underlying trigger for this condition?
A. Hypercalcemia and hypophosphatemia
B. Decreased production of erythropoietin
C. Metabolic alkalosis
D. Hypocalcemia and hyperphosphatemia
Answer: D
