NR507 ADVANCED
PATHOPHYSIOLOGY FINAL EXAM
PREP
1. Which component of the renin-angiotensin-aldosterone system (RAAS) is directly
responsible for potent vasoconstriction and the stimulation of aldosterone release?
A. Angiotensin II
B. Angiotensin I
C. Renin
D. Angiotensinogen
Answer: A
Conceptual Explanation: Angiotensin II is a potent vasoconstrictor and stimulates the
adrenal cortex to release aldosterone, which increases sodium and water reabsorption.
2. In the pathophysiology of heart failure, what is the primary effect of chronic sympathetic
nervous system activation?
A. Decreased afterload through vasodilation
B. Increased myocardial oxygen demand and remodeling
,C. Enhanced renal perfusion and diuresis
D. Decreased heart rate to improve filling time
Answer: B
Conceptual Explanation: Chronic sympathetic activation leads to persistent tachycardia
and vasoconstriction, increasing myocardial oxygen demand and promoting structural
remodeling/hypertrophy.
3. A patient with chronic kidney disease (CKD) develops secondary hyperparathyroidism.
What is the underlying mechanism?
A. Hypocalcemia resulting from decreased renal activation of Vitamin D and phosphate
retention
B. Excessive Vitamin D activation by the kidneys
C. Hypercalcemia inhibiting the parathyroid gland
D. Primary tumor of the parathyroid gland
Answer: A
Conceptual Explanation: In CKD, kidneys cannot activate Vitamin D or excrete phosphate
efficiently. Low Vitamin D and high phosphate lead to low serum calcium, which triggers
the parathyroid glands to overproduce PTH.
, 4. Which type of hypersensitivity reaction is mediated by IgE antibodies and involves the
degranulation of mast cells?
A. Type II (Cytotoxic)
B. Type I (Immediate)
C. Type III (Immune Complex)
D. Type IV (Delayed)
Answer: B
Conceptual Explanation: Type I hypersensitivity involves IgE binding to mast cells,
leading to the release of histamine upon allergen re-exposure.
5. In Multiple Sclerosis, what is the primary target of the immune-mediated inflammatory
response?
A. Myelin sheaths of the central nervous system
B. Dopaminergic neurons in the substantia nigra
C. Acetylcholine receptors at the neuromuscular junction
D. Peripheral nerve axons
Answer: A
Conceptual Explanation: Multiple Sclerosis is an autoimmune disorder characterized by
the destruction of myelin in the brain and spinal cord (CNS).
PATHOPHYSIOLOGY FINAL EXAM
PREP
1. Which component of the renin-angiotensin-aldosterone system (RAAS) is directly
responsible for potent vasoconstriction and the stimulation of aldosterone release?
A. Angiotensin II
B. Angiotensin I
C. Renin
D. Angiotensinogen
Answer: A
Conceptual Explanation: Angiotensin II is a potent vasoconstrictor and stimulates the
adrenal cortex to release aldosterone, which increases sodium and water reabsorption.
2. In the pathophysiology of heart failure, what is the primary effect of chronic sympathetic
nervous system activation?
A. Decreased afterload through vasodilation
B. Increased myocardial oxygen demand and remodeling
,C. Enhanced renal perfusion and diuresis
D. Decreased heart rate to improve filling time
Answer: B
Conceptual Explanation: Chronic sympathetic activation leads to persistent tachycardia
and vasoconstriction, increasing myocardial oxygen demand and promoting structural
remodeling/hypertrophy.
3. A patient with chronic kidney disease (CKD) develops secondary hyperparathyroidism.
What is the underlying mechanism?
A. Hypocalcemia resulting from decreased renal activation of Vitamin D and phosphate
retention
B. Excessive Vitamin D activation by the kidneys
C. Hypercalcemia inhibiting the parathyroid gland
D. Primary tumor of the parathyroid gland
Answer: A
Conceptual Explanation: In CKD, kidneys cannot activate Vitamin D or excrete phosphate
efficiently. Low Vitamin D and high phosphate lead to low serum calcium, which triggers
the parathyroid glands to overproduce PTH.
, 4. Which type of hypersensitivity reaction is mediated by IgE antibodies and involves the
degranulation of mast cells?
A. Type II (Cytotoxic)
B. Type I (Immediate)
C. Type III (Immune Complex)
D. Type IV (Delayed)
Answer: B
Conceptual Explanation: Type I hypersensitivity involves IgE binding to mast cells,
leading to the release of histamine upon allergen re-exposure.
5. In Multiple Sclerosis, what is the primary target of the immune-mediated inflammatory
response?
A. Myelin sheaths of the central nervous system
B. Dopaminergic neurons in the substantia nigra
C. Acetylcholine receptors at the neuromuscular junction
D. Peripheral nerve axons
Answer: A
Conceptual Explanation: Multiple Sclerosis is an autoimmune disorder characterized by
the destruction of myelin in the brain and spinal cord (CNS).
