NURS6501 NURS 6501 ADVANCED
PATHOPHYSIOLOGY ACTUAL WEEK 6
1. A patient with chronic obstructive pulmonary disease
(COPD) develops hypoxemia. Which mechanism is
primarily responsible for this condition?
A. Increased cardiac output
B. Ventilation-perfusion mismatch
C. Increased oxygen affinity of hemoglobin
D. Hyperventilation
Correct Answer: B. Ventilation-perfusion mismatch
Rationale: In COPD, damaged alveoli and airway obstruction
impair proper matching of ventilation and blood flow, resulting
in inadequate oxygen exchange. This ventilation-perfusion
mismatch is the primary cause of hypoxemia in COPD patients.
2. Which electrolyte imbalance is most commonly associated
with cardiac dysrhythmias?
A. Hypercalcemia
B. Hypermagnesemia
C. Hypokalemia
D. Hyperphosphatemia
Correct Answer: C. Hypokalemia
Rationale: Potassium is essential for normal cardiac conduction.
Low potassium levels alter myocardial excitability and
repolarization, increasing the risk of dangerous arrhythmias
such as ventricular tachycardia.
, 3. A patient presents with edema, proteinuria, and
hypoalbuminemia. Which condition is most likely?
A. Nephritic syndrome
B. Nephrotic syndrome
C. Acute kidney injury
D. Pyelonephritis
Correct Answer: B. Nephrotic syndrome
Rationale: Nephrotic syndrome is characterized by massive
protein loss in urine, leading to low serum albumin and edema.
Proteinuria exceeding 3.5 g/day is a hallmark finding.
4. Which hormone is primarily responsible for increasing
blood glucose levels during stress?
A. Insulin
B. Aldosterone
C. Cortisol
D. Oxytocin
Correct Answer: C. Cortisol
Rationale: Cortisol is a glucocorticoid released during stress that
stimulates gluconeogenesis and raises blood glucose levels to
provide energy during physiologic stress.
5. A patient with left-sided heart failure is most likely to
develop which symptom?
A. Peripheral edema
B. Jugular venous distention
C. Pulmonary congestion
D. Hepatomegaly
Correct Answer: C. Pulmonary congestion
,Rationale: Left-sided heart failure causes blood to back up into
the pulmonary circulation, leading to pulmonary edema,
dyspnea, and crackles.
6. Which pathophysiologic process is responsible for type 1
diabetes mellitus?
A. Insulin resistance
B. Autoimmune destruction of beta cells
C. Excess glucagon secretion
D. Obesity-related inflammation
Correct Answer: B. Autoimmune destruction of beta cells
Rationale: Type 1 diabetes results from autoimmune
destruction of pancreatic beta cells, leading to absolute insulin
deficiency.
7. What is the most common cause of iron deficiency anemia
in adults?
A. Bone marrow failure
B. Acute infection
C. Chronic blood loss
D. Hemolysis
Correct Answer: C. Chronic blood loss
Rationale: Chronic blood loss, especially from the
gastrointestinal tract or menstruation, is the leading cause of
iron deficiency anemia in adults.
8. Which acid-base imbalance is characterized by elevated
bicarbonate levels?
, A. Respiratory acidosis
B. Respiratory alkalosis
C. Metabolic acidosis
D. Metabolic alkalosis
Correct Answer: D. Metabolic alkalosis
Rationale: Metabolic alkalosis occurs when bicarbonate
concentration increases due to loss of hydrogen ions or
excessive bicarbonate retention.
9. A patient with hyperthyroidism is likely to exhibit which
manifestation?
A. Weight gain
B. Bradycardia
C. Cold intolerance
D. Tachycardia
Correct Answer: D. Tachycardia
Rationale: Excess thyroid hormone increases metabolic rate and
sympathetic nervous system activity, causing tachycardia and
palpitations.
10. Which condition is associated with destruction of the
myelin sheath in the central nervous system?
A. Myasthenia gravis
B. Multiple sclerosis
C. Parkinson disease
D. Alzheimer disease
Correct Answer: B. Multiple sclerosis
PATHOPHYSIOLOGY ACTUAL WEEK 6
1. A patient with chronic obstructive pulmonary disease
(COPD) develops hypoxemia. Which mechanism is
primarily responsible for this condition?
A. Increased cardiac output
B. Ventilation-perfusion mismatch
C. Increased oxygen affinity of hemoglobin
D. Hyperventilation
Correct Answer: B. Ventilation-perfusion mismatch
Rationale: In COPD, damaged alveoli and airway obstruction
impair proper matching of ventilation and blood flow, resulting
in inadequate oxygen exchange. This ventilation-perfusion
mismatch is the primary cause of hypoxemia in COPD patients.
2. Which electrolyte imbalance is most commonly associated
with cardiac dysrhythmias?
A. Hypercalcemia
B. Hypermagnesemia
C. Hypokalemia
D. Hyperphosphatemia
Correct Answer: C. Hypokalemia
Rationale: Potassium is essential for normal cardiac conduction.
Low potassium levels alter myocardial excitability and
repolarization, increasing the risk of dangerous arrhythmias
such as ventricular tachycardia.
, 3. A patient presents with edema, proteinuria, and
hypoalbuminemia. Which condition is most likely?
A. Nephritic syndrome
B. Nephrotic syndrome
C. Acute kidney injury
D. Pyelonephritis
Correct Answer: B. Nephrotic syndrome
Rationale: Nephrotic syndrome is characterized by massive
protein loss in urine, leading to low serum albumin and edema.
Proteinuria exceeding 3.5 g/day is a hallmark finding.
4. Which hormone is primarily responsible for increasing
blood glucose levels during stress?
A. Insulin
B. Aldosterone
C. Cortisol
D. Oxytocin
Correct Answer: C. Cortisol
Rationale: Cortisol is a glucocorticoid released during stress that
stimulates gluconeogenesis and raises blood glucose levels to
provide energy during physiologic stress.
5. A patient with left-sided heart failure is most likely to
develop which symptom?
A. Peripheral edema
B. Jugular venous distention
C. Pulmonary congestion
D. Hepatomegaly
Correct Answer: C. Pulmonary congestion
,Rationale: Left-sided heart failure causes blood to back up into
the pulmonary circulation, leading to pulmonary edema,
dyspnea, and crackles.
6. Which pathophysiologic process is responsible for type 1
diabetes mellitus?
A. Insulin resistance
B. Autoimmune destruction of beta cells
C. Excess glucagon secretion
D. Obesity-related inflammation
Correct Answer: B. Autoimmune destruction of beta cells
Rationale: Type 1 diabetes results from autoimmune
destruction of pancreatic beta cells, leading to absolute insulin
deficiency.
7. What is the most common cause of iron deficiency anemia
in adults?
A. Bone marrow failure
B. Acute infection
C. Chronic blood loss
D. Hemolysis
Correct Answer: C. Chronic blood loss
Rationale: Chronic blood loss, especially from the
gastrointestinal tract or menstruation, is the leading cause of
iron deficiency anemia in adults.
8. Which acid-base imbalance is characterized by elevated
bicarbonate levels?
, A. Respiratory acidosis
B. Respiratory alkalosis
C. Metabolic acidosis
D. Metabolic alkalosis
Correct Answer: D. Metabolic alkalosis
Rationale: Metabolic alkalosis occurs when bicarbonate
concentration increases due to loss of hydrogen ions or
excessive bicarbonate retention.
9. A patient with hyperthyroidism is likely to exhibit which
manifestation?
A. Weight gain
B. Bradycardia
C. Cold intolerance
D. Tachycardia
Correct Answer: D. Tachycardia
Rationale: Excess thyroid hormone increases metabolic rate and
sympathetic nervous system activity, causing tachycardia and
palpitations.
10. Which condition is associated with destruction of the
myelin sheath in the central nervous system?
A. Myasthenia gravis
B. Multiple sclerosis
C. Parkinson disease
D. Alzheimer disease
Correct Answer: B. Multiple sclerosis
