NR507 WEEK 4 ADVANCED
PATHOPHYSIOLOGY EXAM
QUESTIONS AND VERIFIED ANSWERS |
100% CORRECT | GRADE A+
1. Which compensatory mechanism is most directly responsible for the increase in myocardial
oxygen demand in a patient with untreated chronic hypertension?
A. Increased ventricular compliance
B. Myocardial hypertrophy
C. Decreased peripheral resistance
D. Atrial natriuretic peptide secretion
Answer: B
Conceptual Explanation: In response to increased afterload (hypertension), the heart
undergoes hypertrophy to compensate, which increases the mass of the muscle and
consequently the demand for oxygen.
2. A patient presents with dyspnea, pink frothy sputum, and orthopnea. Which physiological
change most accurately describes the underlying cause of pulmonary edema in this left-sided
heart failure case?
A. Increased pulmonary capillary hydrostatic pressure
,B. Decreased capillary permeability
C. Increased capillary oncotic pressure
D. Decreased lymphatic drainage
Answer: A
Conceptual Explanation: Left heart failure leads to backup of blood into the pulmonary
circulation, increasing hydrostatic pressure and forcing fluid into the alveolar spaces.
3. In the pathophysiology of asthma, which interleukin is primarily responsible for the
recruitment and activation of eosinophils?
A. IL-5
B. IL-2
C. IL-10
D. IL-1
Answer: A
Conceptual Explanation: IL-5 is a key cytokine in the allergic inflammatory response,
specifically driving eosinophil maturation and activation.
4. A 65-year-old male with a history of smoking presents with a barrel chest and prolonged
expiration. Pathological examination would likely show:
A. Thickening of the alveolar-capillary membrane
B. Obliteration of the pleural space
, C. Hypertrophy of the bronchial smooth muscle
D. Destruction of alveolar walls and loss of elastic recoil
Answer: D
Conceptual Explanation: Emphysema involves the destruction of alveolar walls and loss
of elasticity, leading to air trapping and the characteristic barrel chest.
5. What is the primary hemodynamic consequence of aortic stenosis?
A. Increased stroke volume
B. Increased left ventricular pressure
C. Decreased left ventricular afterload
D. Decreased left atrial pressure
Answer: B
Conceptual Explanation: Aortic stenosis creates resistance to blood ejection from the left
ventricle, requiring higher intraventricular pressure to overcome the narrowed opening.
6. Which of the following is a characteristic feature of Cor Pulmonale?
A. Right ventricular hypertrophy secondary to pulmonary hypertension
B. Left ventricular failure due to systemic hypertension
C. Mitral valve prolapse causing pulmonary congestion
D. Aortic regurgitation leading to systemic edema
PATHOPHYSIOLOGY EXAM
QUESTIONS AND VERIFIED ANSWERS |
100% CORRECT | GRADE A+
1. Which compensatory mechanism is most directly responsible for the increase in myocardial
oxygen demand in a patient with untreated chronic hypertension?
A. Increased ventricular compliance
B. Myocardial hypertrophy
C. Decreased peripheral resistance
D. Atrial natriuretic peptide secretion
Answer: B
Conceptual Explanation: In response to increased afterload (hypertension), the heart
undergoes hypertrophy to compensate, which increases the mass of the muscle and
consequently the demand for oxygen.
2. A patient presents with dyspnea, pink frothy sputum, and orthopnea. Which physiological
change most accurately describes the underlying cause of pulmonary edema in this left-sided
heart failure case?
A. Increased pulmonary capillary hydrostatic pressure
,B. Decreased capillary permeability
C. Increased capillary oncotic pressure
D. Decreased lymphatic drainage
Answer: A
Conceptual Explanation: Left heart failure leads to backup of blood into the pulmonary
circulation, increasing hydrostatic pressure and forcing fluid into the alveolar spaces.
3. In the pathophysiology of asthma, which interleukin is primarily responsible for the
recruitment and activation of eosinophils?
A. IL-5
B. IL-2
C. IL-10
D. IL-1
Answer: A
Conceptual Explanation: IL-5 is a key cytokine in the allergic inflammatory response,
specifically driving eosinophil maturation and activation.
4. A 65-year-old male with a history of smoking presents with a barrel chest and prolonged
expiration. Pathological examination would likely show:
A. Thickening of the alveolar-capillary membrane
B. Obliteration of the pleural space
, C. Hypertrophy of the bronchial smooth muscle
D. Destruction of alveolar walls and loss of elastic recoil
Answer: D
Conceptual Explanation: Emphysema involves the destruction of alveolar walls and loss
of elasticity, leading to air trapping and the characteristic barrel chest.
5. What is the primary hemodynamic consequence of aortic stenosis?
A. Increased stroke volume
B. Increased left ventricular pressure
C. Decreased left ventricular afterload
D. Decreased left atrial pressure
Answer: B
Conceptual Explanation: Aortic stenosis creates resistance to blood ejection from the left
ventricle, requiring higher intraventricular pressure to overcome the narrowed opening.
6. Which of the following is a characteristic feature of Cor Pulmonale?
A. Right ventricular hypertrophy secondary to pulmonary hypertension
B. Left ventricular failure due to systemic hypertension
C. Mitral valve prolapse causing pulmonary congestion
D. Aortic regurgitation leading to systemic edema
