NURS6501 ADVANCED
PATHOPHYSIOLOGY FINAL EXAM
QUESTIONS AND VERIFIED ANSWERS |
100% CORRECT | GRADE A+
1. Which of the following describes the mechanism by which chronic hyperglycemia leads to
microvascular complications in patients with Diabetes Mellitus?
A. Activation of the polyol pathway causing osmotic stress and oxidative damage
B. Decrease in advanced glycation end products (AGEs) leading to vessel fragility
C. Inhibition of protein kinase C signaling in endothelial cells
D. Systemic vasodilation caused by nitric oxide overproduction
Answer: A
Conceptual Explanation: Chronic hyperglycemia activates the polyol pathway, leading to
the accumulation of sorbitol, which creates osmotic stress and generates reactive oxygen
species, contributing to microvascular damage.
,2. In the context of heart failure with reduced ejection fraction (HFrEF), what is the primary
deleterious effect of long-term activation of the renin-angiotensin-aldosterone system
(RAAS)?
A. Increased myocardial contractility through beta-1 stimulation
B. Ventricular remodeling and myocardial fibrosis
C. Peripheral vasodilation reducing afterload
D. Enhanced renal perfusion and sodium excretion
Answer: B
Conceptual Explanation: While initially compensatory, chronic RAAS activation leads to
angiotensin II-mediated ventricular remodeling and aldosterone-mediated fibrosis, which
worsens cardiac function over time.
3. A patient presents with a pH of 7.25, PaCO2 of 55 mmHg, and HCO3- of 26 mEq/L. Which
condition is the most likely cause?
A. Hypoventilation due to COPD
B. Excessive vomiting
C. Diabetic ketoacidosis
D. Hyperventilation due to anxiety
Answer: A
, Conceptual Explanation: The pH is low (acidosis) and the PaCO2 is high (respiratory),
indicating respiratory acidosis, which is commonly caused by hypoventilation in conditions
like COPD.
4. What is the hallmark pathophysiological change in the brain of a patient with Alzheimer’s
disease?
A. Demyelination of axons in the white matter
B. Accumulation of amyloid-beta plaques and neurofibrillary tangles
C. Depletion of dopamine in the substantia nigra
D. Excessive glutamate release causing excitotoxicity in the cerebellum
Answer: B
Conceptual Explanation: Alzheimer’s disease is characterized by the extracellular
accumulation of amyloid-beta plaques and intracellular neurofibrillary tangles composed
of hyperphosphorylated tau protein.
5. During the progression of Chronic Kidney Disease (CKD), why does secondary
hyperparathyroidism develop?
A. Increased renal excretion of calcium
B. Direct stimulation of the parathyroid gland by urea
C. Hyperphosphatemia and decreased activation of Vitamin D
D. Hypokalemia triggering PTH release
PATHOPHYSIOLOGY FINAL EXAM
QUESTIONS AND VERIFIED ANSWERS |
100% CORRECT | GRADE A+
1. Which of the following describes the mechanism by which chronic hyperglycemia leads to
microvascular complications in patients with Diabetes Mellitus?
A. Activation of the polyol pathway causing osmotic stress and oxidative damage
B. Decrease in advanced glycation end products (AGEs) leading to vessel fragility
C. Inhibition of protein kinase C signaling in endothelial cells
D. Systemic vasodilation caused by nitric oxide overproduction
Answer: A
Conceptual Explanation: Chronic hyperglycemia activates the polyol pathway, leading to
the accumulation of sorbitol, which creates osmotic stress and generates reactive oxygen
species, contributing to microvascular damage.
,2. In the context of heart failure with reduced ejection fraction (HFrEF), what is the primary
deleterious effect of long-term activation of the renin-angiotensin-aldosterone system
(RAAS)?
A. Increased myocardial contractility through beta-1 stimulation
B. Ventricular remodeling and myocardial fibrosis
C. Peripheral vasodilation reducing afterload
D. Enhanced renal perfusion and sodium excretion
Answer: B
Conceptual Explanation: While initially compensatory, chronic RAAS activation leads to
angiotensin II-mediated ventricular remodeling and aldosterone-mediated fibrosis, which
worsens cardiac function over time.
3. A patient presents with a pH of 7.25, PaCO2 of 55 mmHg, and HCO3- of 26 mEq/L. Which
condition is the most likely cause?
A. Hypoventilation due to COPD
B. Excessive vomiting
C. Diabetic ketoacidosis
D. Hyperventilation due to anxiety
Answer: A
, Conceptual Explanation: The pH is low (acidosis) and the PaCO2 is high (respiratory),
indicating respiratory acidosis, which is commonly caused by hypoventilation in conditions
like COPD.
4. What is the hallmark pathophysiological change in the brain of a patient with Alzheimer’s
disease?
A. Demyelination of axons in the white matter
B. Accumulation of amyloid-beta plaques and neurofibrillary tangles
C. Depletion of dopamine in the substantia nigra
D. Excessive glutamate release causing excitotoxicity in the cerebellum
Answer: B
Conceptual Explanation: Alzheimer’s disease is characterized by the extracellular
accumulation of amyloid-beta plaques and intracellular neurofibrillary tangles composed
of hyperphosphorylated tau protein.
5. During the progression of Chronic Kidney Disease (CKD), why does secondary
hyperparathyroidism develop?
A. Increased renal excretion of calcium
B. Direct stimulation of the parathyroid gland by urea
C. Hyperphosphatemia and decreased activation of Vitamin D
D. Hypokalemia triggering PTH release
