NURS 5220 ADVANCED
PATHOPHYSIOLOGY EXAM 2
CHALLENGE QUESTIONS WITH
CORRECT VERIFIED ANSWERS |
GURANTEED A+
1. Which process is considered the initial step in the development of atherosclerosis?
A. Formation of foam cells
B. Fibrous plaque rupture
C. Smooth muscle cell proliferation
D. Endothelial injury and dysfunction
Answer: D
Conceptual Explanation: Atherosclerosis begins with injury to the endothelial cells that
line artery walls. Common causes include hypertension, smoking, and hyperlipidemia,
leading to inflammation and oxidative stress.
2. In Heart Failure with Reduced Ejection Fraction (HFrEF), what is the primary
pathophysiological mechanism?
A. Increased ventricular compliance
B. Excessive thickening of the pericardium
,C. Abnormal diastolic relaxation
D. Impaired ventricular contraction and reduced stroke volume
Answer: D
Conceptual Explanation: HFrEF is characterized by a decrease in left ventricular
contractility, leading to an ejection fraction of less than 40% and reduced cardiac output.
3. What is the compensatory mechanism of the Renin-Angiotensin-Aldosterone System
(RAAS) in chronic heart failure?
A. Decreasing systemic vascular resistance
B. Increasing preload and afterload to maintain perfusion
C. Promoting water and sodium excretion
D. Inhibiting sympathetic nervous system activity
Answer: B
Conceptual Explanation: RAAS is activated to maintain blood pressure; however, the
resulting sodium/water retention (increased preload) and vasoconstriction (increased
afterload) eventually worsen heart failure.
4. Which valvular disorder is characterized by a loud S1 and a mid-diastolic rumble heard at
the apex?
A. Mitral Stenosis
B. Aortic Regurgitation
, C. Mitral Regurgitation
D. Aortic Stenosis
Answer: A
Conceptual Explanation: Mitral stenosis causes resistance to blood flow from the left
atrium to the left ventricle, typically resulting in a diastolic murmur and an opening snap.
5. How long does it take for myocardial cells to become ischemic after a total coronary
occlusion?
A. 10 seconds
B. 2 minutes
C. 30 seconds
D. 20 minutes
Answer: A
Conceptual Explanation: Myocardial cells become ischemic within 10 seconds of coronary
occlusion. If perfusion is not restored within 20 minutes, irreversible necrosis (infarction)
begins.
6. Which laboratory marker is the most sensitive and specific for diagnosing acute myocardial
infarction?
A. Cardiac Troponin I (cTnI)
B. Creatine Kinase (CK-MB)
PATHOPHYSIOLOGY EXAM 2
CHALLENGE QUESTIONS WITH
CORRECT VERIFIED ANSWERS |
GURANTEED A+
1. Which process is considered the initial step in the development of atherosclerosis?
A. Formation of foam cells
B. Fibrous plaque rupture
C. Smooth muscle cell proliferation
D. Endothelial injury and dysfunction
Answer: D
Conceptual Explanation: Atherosclerosis begins with injury to the endothelial cells that
line artery walls. Common causes include hypertension, smoking, and hyperlipidemia,
leading to inflammation and oxidative stress.
2. In Heart Failure with Reduced Ejection Fraction (HFrEF), what is the primary
pathophysiological mechanism?
A. Increased ventricular compliance
B. Excessive thickening of the pericardium
,C. Abnormal diastolic relaxation
D. Impaired ventricular contraction and reduced stroke volume
Answer: D
Conceptual Explanation: HFrEF is characterized by a decrease in left ventricular
contractility, leading to an ejection fraction of less than 40% and reduced cardiac output.
3. What is the compensatory mechanism of the Renin-Angiotensin-Aldosterone System
(RAAS) in chronic heart failure?
A. Decreasing systemic vascular resistance
B. Increasing preload and afterload to maintain perfusion
C. Promoting water and sodium excretion
D. Inhibiting sympathetic nervous system activity
Answer: B
Conceptual Explanation: RAAS is activated to maintain blood pressure; however, the
resulting sodium/water retention (increased preload) and vasoconstriction (increased
afterload) eventually worsen heart failure.
4. Which valvular disorder is characterized by a loud S1 and a mid-diastolic rumble heard at
the apex?
A. Mitral Stenosis
B. Aortic Regurgitation
, C. Mitral Regurgitation
D. Aortic Stenosis
Answer: A
Conceptual Explanation: Mitral stenosis causes resistance to blood flow from the left
atrium to the left ventricle, typically resulting in a diastolic murmur and an opening snap.
5. How long does it take for myocardial cells to become ischemic after a total coronary
occlusion?
A. 10 seconds
B. 2 minutes
C. 30 seconds
D. 20 minutes
Answer: A
Conceptual Explanation: Myocardial cells become ischemic within 10 seconds of coronary
occlusion. If perfusion is not restored within 20 minutes, irreversible necrosis (infarction)
begins.
6. Which laboratory marker is the most sensitive and specific for diagnosing acute myocardial
infarction?
A. Cardiac Troponin I (cTnI)
B. Creatine Kinase (CK-MB)
