NR507 ADVANCED
PATHOPHYSIOLOGY FINAL EXAM
PREPARATION QUESTIONS AND
ANSWERS
1. Which of the following is the primary mechanism behind the development of type 1
diabetes mellitus?
A. Insulin resistance in peripheral tissues
B. Excessive glucagon production by alpha cells
C. Autoimmune destruction of pancreatic beta cells
D. Decreased glucose absorption in the gut
Answer: C
Conceptual Explanation: Type 1 diabetes is characterized by an autoimmune-mediated
destruction of the insulin-producing beta cells in the pancreas, leading to absolute insulin
deficiency.
2. In the Renin-Angiotensin-Aldosterone System (RAAS), what is the direct effect of
Angiotensin II?
A. Systemic vasoconstriction and aldosterone release
,B. Inhibition of ADH release
C. Peripheral vasodilation
D. Increased potassium excretion in the proximal tubule
Answer: A
Conceptual Explanation: Angiotensin II is a potent vasoconstrictor and stimulates the
adrenal cortex to release aldosterone, which promotes sodium and water retention.
3. Which type of hypersensitivity reaction is primarily mediated by IgE antibodies and mast
cell degranulation?
A. Type II
B. Type I
C. Type III
D. Type IV
Answer: B
Conceptual Explanation: Type I hypersensitivity is an immediate allergic reaction
involving IgE binding to mast cells, causing the release of histamine.
4. A patient with chronic kidney disease (CKD) often develops secondary hyperparathyroidism
due to which mechanism?
A. Excessive vitamin D intake
B. Hypercalcemia inhibiting the parathyroid gland
, C. Hypophosphatemia causing gland atrophy
D. Hypocalcemia resulting from decreased vitamin D activation
Answer: D
Conceptual Explanation: In CKD, the kidneys cannot activate Vitamin D (calcitriol),
leading to low calcium levels, which stimulates the parathyroid glands to produce more
PTH.
5. Which characteristic is typically associated with Parkinson’s disease?
A. Demyelination of central nervous system axons
B. Formation of amyloid plaques in the cerebral cortex
C. Excessive acetylcholine at the neuromuscular junction
D. Loss of dopaminergic neurons in the substantia nigra
Answer: D
Conceptual Explanation: Parkinson’s disease is a neurodegenerative disorder caused by
the loss of dopamine-producing neurons in the substantia nigra of the basal ganglia.
6. What is the pathophysiological cause of the ‘skip lesions’ observed in Crohn’s disease?
A. Transmural inflammation affecting any part of the GI tract
B. Superficial mucosal inflammation limited to the colon
C. Bacterial overgrowth in the small intestine
PATHOPHYSIOLOGY FINAL EXAM
PREPARATION QUESTIONS AND
ANSWERS
1. Which of the following is the primary mechanism behind the development of type 1
diabetes mellitus?
A. Insulin resistance in peripheral tissues
B. Excessive glucagon production by alpha cells
C. Autoimmune destruction of pancreatic beta cells
D. Decreased glucose absorption in the gut
Answer: C
Conceptual Explanation: Type 1 diabetes is characterized by an autoimmune-mediated
destruction of the insulin-producing beta cells in the pancreas, leading to absolute insulin
deficiency.
2. In the Renin-Angiotensin-Aldosterone System (RAAS), what is the direct effect of
Angiotensin II?
A. Systemic vasoconstriction and aldosterone release
,B. Inhibition of ADH release
C. Peripheral vasodilation
D. Increased potassium excretion in the proximal tubule
Answer: A
Conceptual Explanation: Angiotensin II is a potent vasoconstrictor and stimulates the
adrenal cortex to release aldosterone, which promotes sodium and water retention.
3. Which type of hypersensitivity reaction is primarily mediated by IgE antibodies and mast
cell degranulation?
A. Type II
B. Type I
C. Type III
D. Type IV
Answer: B
Conceptual Explanation: Type I hypersensitivity is an immediate allergic reaction
involving IgE binding to mast cells, causing the release of histamine.
4. A patient with chronic kidney disease (CKD) often develops secondary hyperparathyroidism
due to which mechanism?
A. Excessive vitamin D intake
B. Hypercalcemia inhibiting the parathyroid gland
, C. Hypophosphatemia causing gland atrophy
D. Hypocalcemia resulting from decreased vitamin D activation
Answer: D
Conceptual Explanation: In CKD, the kidneys cannot activate Vitamin D (calcitriol),
leading to low calcium levels, which stimulates the parathyroid glands to produce more
PTH.
5. Which characteristic is typically associated with Parkinson’s disease?
A. Demyelination of central nervous system axons
B. Formation of amyloid plaques in the cerebral cortex
C. Excessive acetylcholine at the neuromuscular junction
D. Loss of dopaminergic neurons in the substantia nigra
Answer: D
Conceptual Explanation: Parkinson’s disease is a neurodegenerative disorder caused by
the loss of dopamine-producing neurons in the substantia nigra of the basal ganglia.
6. What is the pathophysiological cause of the ‘skip lesions’ observed in Crohn’s disease?
A. Transmural inflammation affecting any part of the GI tract
B. Superficial mucosal inflammation limited to the colon
C. Bacterial overgrowth in the small intestine
