NU 641 ADVANCED
PATHOPHYSIOLOGY - EXAM 2
PRACTICE QUESTIONS AND ANSWERS
AND EXPLANATIONS | LATEST - REGIS
1. Which compensatory mechanism in heart failure directly leads to increased afterload and
further myocardial stress?
A. Release of Atrial Natriuretic Peptide (ANP)
B. Activation of the Renin-Angiotensin-Aldosterone System (RAAS)
C. Increased parasympathetic vagal tone
D. Downregulation of beta-1 receptors
Answer: B
Conceptual Explanation: RAAS activation results in the production of Angiotensin II, a
potent vasoconstrictor that increases systemic vascular resistance (afterload), forcing the
heart to work harder.
2. In the pathophysiology of Acute Respiratory Distress Syndrome (ARDS), what is the primary
cause of severe hypoxemia that is refractory to oxygen therapy?
A. Bronchoconstriction and airway narrowing
B. Right-to-left intrapulmonary shunting due to alveolar collapse
,C. Increased pulmonary compliance
D. Decrease in pulmonary artery pressure
Answer: B
Conceptual Explanation: Alveolar edema and surfactant inactivation lead to alveolar
collapse, creating areas where blood flows but no gas exchange occurs (shunting).
3. A patient with Chronic Kidney Disease (CKD) develops secondary hyperparathyroidism.
What is the fundamental trigger for this condition?
A. Hyperphosphatemia and decreased activation of Vitamin D
B. Excessive production of active Vitamin D (calcitriol)
C. Hypophosphatemia and increased magnesium
D. Hypercalcemia and hypophosphatemia
Answer: A
Conceptual Explanation: In CKD, phosphate retention and the inability of the kidneys to
activate Vitamin D lead to low serum calcium, which stimulates the parathyroid glands.
4. What is the primary pathophysiological difference between Type 1 and Type 2 Diabetes
Mellitus?
A. Type 1 involves insulin resistance, while Type 2 involves absolute insulin deficiency
B. Type 1 only occurs in children, while Type 2 only occurs in obese adults
, C. Type 1 is characterized by autoimmune destruction of beta cells, while Type 2 is
characterized by insulin resistance and relative deficiency
D. Type 1 is caused by liver failure, while Type 2 is caused by pancreatic exhaustion
Answer: C
Conceptual Explanation: Type 1 DM is an autoimmune condition resulting in the loss of
insulin-producing cells, whereas Type 2 involves impaired insulin sensitivity and gradual
beta-cell dysfunction.
5. During an asthma attack, what is the role of the late-phase response occurring 4 to 8 hours
after the initial trigger?
A. Immediate mast cell degranulation and histamine release
B. Rapid bronchodilation via sympathetic activation
C. Eosinophil recruitment and persistent airway inflammation
D. Decrease in mucus production to clear the airways
Answer: C
Conceptual Explanation: The late-phase response involves the influx of inflammatory
cells like eosinophils and neutrophils, causing prolonged airway inflammation and
hyperresponsiveness.
PATHOPHYSIOLOGY - EXAM 2
PRACTICE QUESTIONS AND ANSWERS
AND EXPLANATIONS | LATEST - REGIS
1. Which compensatory mechanism in heart failure directly leads to increased afterload and
further myocardial stress?
A. Release of Atrial Natriuretic Peptide (ANP)
B. Activation of the Renin-Angiotensin-Aldosterone System (RAAS)
C. Increased parasympathetic vagal tone
D. Downregulation of beta-1 receptors
Answer: B
Conceptual Explanation: RAAS activation results in the production of Angiotensin II, a
potent vasoconstrictor that increases systemic vascular resistance (afterload), forcing the
heart to work harder.
2. In the pathophysiology of Acute Respiratory Distress Syndrome (ARDS), what is the primary
cause of severe hypoxemia that is refractory to oxygen therapy?
A. Bronchoconstriction and airway narrowing
B. Right-to-left intrapulmonary shunting due to alveolar collapse
,C. Increased pulmonary compliance
D. Decrease in pulmonary artery pressure
Answer: B
Conceptual Explanation: Alveolar edema and surfactant inactivation lead to alveolar
collapse, creating areas where blood flows but no gas exchange occurs (shunting).
3. A patient with Chronic Kidney Disease (CKD) develops secondary hyperparathyroidism.
What is the fundamental trigger for this condition?
A. Hyperphosphatemia and decreased activation of Vitamin D
B. Excessive production of active Vitamin D (calcitriol)
C. Hypophosphatemia and increased magnesium
D. Hypercalcemia and hypophosphatemia
Answer: A
Conceptual Explanation: In CKD, phosphate retention and the inability of the kidneys to
activate Vitamin D lead to low serum calcium, which stimulates the parathyroid glands.
4. What is the primary pathophysiological difference between Type 1 and Type 2 Diabetes
Mellitus?
A. Type 1 involves insulin resistance, while Type 2 involves absolute insulin deficiency
B. Type 1 only occurs in children, while Type 2 only occurs in obese adults
, C. Type 1 is characterized by autoimmune destruction of beta cells, while Type 2 is
characterized by insulin resistance and relative deficiency
D. Type 1 is caused by liver failure, while Type 2 is caused by pancreatic exhaustion
Answer: C
Conceptual Explanation: Type 1 DM is an autoimmune condition resulting in the loss of
insulin-producing cells, whereas Type 2 involves impaired insulin sensitivity and gradual
beta-cell dysfunction.
5. During an asthma attack, what is the role of the late-phase response occurring 4 to 8 hours
after the initial trigger?
A. Immediate mast cell degranulation and histamine release
B. Rapid bronchodilation via sympathetic activation
C. Eosinophil recruitment and persistent airway inflammation
D. Decrease in mucus production to clear the airways
Answer: C
Conceptual Explanation: The late-phase response involves the influx of inflammatory
cells like eosinophils and neutrophils, causing prolonged airway inflammation and
hyperresponsiveness.
