NU 650 ADVANCED
PATHOPHYSIOLOGY EXAM PREP 2026
QUESTIONS AND ANSWERS
1. Which cellular adaptation is characterized by the replacement of one mature cell type by
another, often as a response to chronic irritation?
A. Atrophy
B. Metaplasia
C. Hyperplasia
D. Dysplasia
Answer: B
Conceptual Explanation: Metaplasia is a reversible replacement of one mature cell type
by another less differentiated cell type, typically in response to chronic injury or irritation.
2. In the process of apoptosis, what is the role of caspases?
A. Maintenance of mitochondrial membrane potential
B. Initiation of the inflammatory response
C. Promotion of cellular hypertrophy
,D. Execution of programmed cell death via proteolysis
Answer: D
Conceptual Explanation: Caspases are a family of protease enzymes that play essential
roles in programmed cell death (apoptosis) by cleaving specific proteins.
3. A patient with chronic renal failure exhibits secondary hyperparathyroidism. What is the
primary pathophysiological trigger for this condition?
A. Hypercalcemia
B. Hyperphosphatemia and low Vitamin D
C. Increased intestinal absorption of calcium
D. Decreased production of Erythropoietin
Answer: B
Conceptual Explanation: In CKD, phosphate retention and reduced activation of Vitamin
D lead to hypocalcemia, which stimulates the parathyroid glands to overproduce PTH.
4. Which mechanism best explains the development of edema in a patient with nephrotic
syndrome?
A. Increased capillary hydrostatic pressure
B. Decreased plasma oncotic pressure
C. Increased capillary permeability due to histamine
D. Lymphatic obstruction
, Answer: B
Conceptual Explanation: Nephrotic syndrome involves massive proteinuria, which
decreases albumin levels in the blood, leading to a drop in plasma oncotic pressure and
subsequent fluid shift.
5. During an inflammatory response, which mediator is primarily responsible for inducing
pain by sensitizing nociceptors?
A. Histamine
B. Leukotrienes
C. Prostaglandins
D. Complement C5a
Answer: C
Conceptual Explanation: Prostaglandins (specifically PGE2) sensitize pain receptors to
other inflammatory mediators like bradykinin.
6. What is the hallmark physiological finding in Type I hypersensitivity reactions?
A. IgG mediated cytotoxic attack
B. Immune complex deposition in joints
C. T-cell mediated delayed response
D. IgE mediated mast cell degranulation
Answer: D
PATHOPHYSIOLOGY EXAM PREP 2026
QUESTIONS AND ANSWERS
1. Which cellular adaptation is characterized by the replacement of one mature cell type by
another, often as a response to chronic irritation?
A. Atrophy
B. Metaplasia
C. Hyperplasia
D. Dysplasia
Answer: B
Conceptual Explanation: Metaplasia is a reversible replacement of one mature cell type
by another less differentiated cell type, typically in response to chronic injury or irritation.
2. In the process of apoptosis, what is the role of caspases?
A. Maintenance of mitochondrial membrane potential
B. Initiation of the inflammatory response
C. Promotion of cellular hypertrophy
,D. Execution of programmed cell death via proteolysis
Answer: D
Conceptual Explanation: Caspases are a family of protease enzymes that play essential
roles in programmed cell death (apoptosis) by cleaving specific proteins.
3. A patient with chronic renal failure exhibits secondary hyperparathyroidism. What is the
primary pathophysiological trigger for this condition?
A. Hypercalcemia
B. Hyperphosphatemia and low Vitamin D
C. Increased intestinal absorption of calcium
D. Decreased production of Erythropoietin
Answer: B
Conceptual Explanation: In CKD, phosphate retention and reduced activation of Vitamin
D lead to hypocalcemia, which stimulates the parathyroid glands to overproduce PTH.
4. Which mechanism best explains the development of edema in a patient with nephrotic
syndrome?
A. Increased capillary hydrostatic pressure
B. Decreased plasma oncotic pressure
C. Increased capillary permeability due to histamine
D. Lymphatic obstruction
, Answer: B
Conceptual Explanation: Nephrotic syndrome involves massive proteinuria, which
decreases albumin levels in the blood, leading to a drop in plasma oncotic pressure and
subsequent fluid shift.
5. During an inflammatory response, which mediator is primarily responsible for inducing
pain by sensitizing nociceptors?
A. Histamine
B. Leukotrienes
C. Prostaglandins
D. Complement C5a
Answer: C
Conceptual Explanation: Prostaglandins (specifically PGE2) sensitize pain receptors to
other inflammatory mediators like bradykinin.
6. What is the hallmark physiological finding in Type I hypersensitivity reactions?
A. IgG mediated cytotoxic attack
B. Immune complex deposition in joints
C. T-cell mediated delayed response
D. IgE mediated mast cell degranulation
Answer: D
