NR507 FINAL EXAM – COMPREHENSIVE
ADVANCED PATHOPHYSIOLOGY REVIEW
EXAM QUESTIONS AND 100% VERIFIED
ANSWERS WITH RATIONALES GRADED A+
LATEST
1.
A 58-year-old patient with long-standing hypertension develops concentric left ventricular hypertrophy.
Which mechanism primarily drives this structural change?
A. Increased preload from volume overload
B. Chronic pressure overload leading to myocardial fiber thickening
C. Decreased afterload resulting in chamber dilation
D. Increased sympathetic stimulation causing myocyte apoptosis
Correct Answer: B
Rationale: Chronic pressure overload, such as from hypertension, stimulates myocardial cells to thicken
(concentric hypertrophy) in order to reduce wall stress.
2.
Which electrolyte abnormality is most likely to cause peaked T waves on an electrocardiogram?
A. Hypocalcemia
B. Hypokalemia
C. Hyperkalemia
D. Hypermagnesemia
,Correct Answer: C
Rationale: Hyperkalemia alters cardiac membrane potentials, leading to characteristic ECG changes
including peaked T waves and widened QRS complexes.
3.
A patient with chronic obstructive pulmonary disease develops secondary polycythemia. What is the
primary stimulus for this condition?
A. Reduced erythropoietin production
B. Chronic hypoxemia stimulating erythropoietin release
C. Increased plasma volume
D. Bone marrow suppression
Correct Answer: B
Rationale: Chronic hypoxemia stimulates the kidneys to increase erythropoietin production, resulting in
elevated red blood cell mass.
4.
Which cytokine plays a central role in the acute-phase inflammatory response?
A. Interleukin-10
B. Tumor necrosis factor-alpha
C. Interleukin-1
D. Transforming growth factor-beta
Correct Answer: C
Rationale: Interleukin-1 is a key mediator of the acute-phase response, promoting fever, leukocyte
activation, and hepatic protein synthesis.
5.
,Correct Answer: Rationale:
A decrease in surfactant production in premature infants primarily leads to:
A. Increased lung compliance
B. Alveolar collapse due to increased surface tension
C. Pulmonary edema from capillary leakage
D. Hyperinflation of alveoli
B
Surfactant reduces surface tension in alveoli; its deficiency causes alveolar
collapse (atelectasis), characteristic of neonatal respiratory distress syndrome.
6.
Which condition results from an autoimmune destruction of acetylcholine receptors at the neuromuscular
junction?
A. Lambert-Eaton syndrome
B. Myasthenia gravis
C. Guillain-Barré syndrome
D. Amyotrophic lateral sclerosis
Correct Answer: B
Rationale: Myasthenia gravis is caused by autoantibodies targeting postsynaptic acetylcholine receptors,
leading to muscle weakness.
7.
A patient with chronic kidney disease develops metabolic acidosis. Which compensatory mechanism is
expected?
A. Hypoventilation
B. Increased bicarbonate excretion
C. Increased respiratory rate
D. Decreased hydrogen ion secretion
Correct Answer: C
Rationale: The respiratory system compensates for metabolic acidosis by increasing ventilation to
eliminate carbon dioxide.
, 8.
Which hormone primarily regulates sodium reabsorption in the distal nephron?
A. Antidiuretic hormone
B. Aldosterone
C. Atrial natriuretic peptide
D. Renin
Correct Answer: B
Rationale: Aldosterone increases sodium reabsorption and potassium secretion in the distal tubules and
collecting ducts.
9.
Insulin resistance in type 2 diabetes mellitus is most strongly associated with:
A. Autoimmune beta-cell destruction
B. Increased insulin receptor sensitivity
C. Decreased glucose uptake by peripheral tissues
D. Complete absence of insulin secretion
Correct Answer: C
Rationale: Insulin resistance impairs glucose uptake in skeletal muscle and adipose tissue despite
adequate or elevated insulin levels.
10.
Which pathophysiologic process best explains edema formation in nephrotic syndrome?
A. Increased capillary hydrostatic pressure
B. Reduced plasma oncotic pressure from protein loss
C. Increased lymphatic obstruction
D. Elevated antidiuretic hormone levels
ADVANCED PATHOPHYSIOLOGY REVIEW
EXAM QUESTIONS AND 100% VERIFIED
ANSWERS WITH RATIONALES GRADED A+
LATEST
1.
A 58-year-old patient with long-standing hypertension develops concentric left ventricular hypertrophy.
Which mechanism primarily drives this structural change?
A. Increased preload from volume overload
B. Chronic pressure overload leading to myocardial fiber thickening
C. Decreased afterload resulting in chamber dilation
D. Increased sympathetic stimulation causing myocyte apoptosis
Correct Answer: B
Rationale: Chronic pressure overload, such as from hypertension, stimulates myocardial cells to thicken
(concentric hypertrophy) in order to reduce wall stress.
2.
Which electrolyte abnormality is most likely to cause peaked T waves on an electrocardiogram?
A. Hypocalcemia
B. Hypokalemia
C. Hyperkalemia
D. Hypermagnesemia
,Correct Answer: C
Rationale: Hyperkalemia alters cardiac membrane potentials, leading to characteristic ECG changes
including peaked T waves and widened QRS complexes.
3.
A patient with chronic obstructive pulmonary disease develops secondary polycythemia. What is the
primary stimulus for this condition?
A. Reduced erythropoietin production
B. Chronic hypoxemia stimulating erythropoietin release
C. Increased plasma volume
D. Bone marrow suppression
Correct Answer: B
Rationale: Chronic hypoxemia stimulates the kidneys to increase erythropoietin production, resulting in
elevated red blood cell mass.
4.
Which cytokine plays a central role in the acute-phase inflammatory response?
A. Interleukin-10
B. Tumor necrosis factor-alpha
C. Interleukin-1
D. Transforming growth factor-beta
Correct Answer: C
Rationale: Interleukin-1 is a key mediator of the acute-phase response, promoting fever, leukocyte
activation, and hepatic protein synthesis.
5.
,Correct Answer: Rationale:
A decrease in surfactant production in premature infants primarily leads to:
A. Increased lung compliance
B. Alveolar collapse due to increased surface tension
C. Pulmonary edema from capillary leakage
D. Hyperinflation of alveoli
B
Surfactant reduces surface tension in alveoli; its deficiency causes alveolar
collapse (atelectasis), characteristic of neonatal respiratory distress syndrome.
6.
Which condition results from an autoimmune destruction of acetylcholine receptors at the neuromuscular
junction?
A. Lambert-Eaton syndrome
B. Myasthenia gravis
C. Guillain-Barré syndrome
D. Amyotrophic lateral sclerosis
Correct Answer: B
Rationale: Myasthenia gravis is caused by autoantibodies targeting postsynaptic acetylcholine receptors,
leading to muscle weakness.
7.
A patient with chronic kidney disease develops metabolic acidosis. Which compensatory mechanism is
expected?
A. Hypoventilation
B. Increased bicarbonate excretion
C. Increased respiratory rate
D. Decreased hydrogen ion secretion
Correct Answer: C
Rationale: The respiratory system compensates for metabolic acidosis by increasing ventilation to
eliminate carbon dioxide.
, 8.
Which hormone primarily regulates sodium reabsorption in the distal nephron?
A. Antidiuretic hormone
B. Aldosterone
C. Atrial natriuretic peptide
D. Renin
Correct Answer: B
Rationale: Aldosterone increases sodium reabsorption and potassium secretion in the distal tubules and
collecting ducts.
9.
Insulin resistance in type 2 diabetes mellitus is most strongly associated with:
A. Autoimmune beta-cell destruction
B. Increased insulin receptor sensitivity
C. Decreased glucose uptake by peripheral tissues
D. Complete absence of insulin secretion
Correct Answer: C
Rationale: Insulin resistance impairs glucose uptake in skeletal muscle and adipose tissue despite
adequate or elevated insulin levels.
10.
Which pathophysiologic process best explains edema formation in nephrotic syndrome?
A. Increased capillary hydrostatic pressure
B. Reduced plasma oncotic pressure from protein loss
C. Increased lymphatic obstruction
D. Elevated antidiuretic hormone levels
