NURS 5350 ADVANCED
PATHOPHYSIOLOGY MASTER
EXAM 150 QUESTIONS AND
ANSWERS WITH
COMPREHENSIVE CLINICAL
RATIONALES LATEST 2026 2027
GUIDE
Advanced Pathophysiology Exam
1. A 64-year-old male with a history of severe chronic
obstructive pulmonary disease (COPD) is admitted with
acute respiratory failure. His arterial blood gas (ABG) reveals
a pH of 7.22, PaCO2 of 68 mmHg, and HCO3- of 28 mEq/L.
Which cellular adaptation or response is most likely
occurring in his renal tubular epithelial cells to compensate
for this chronic state?
A. Atrophy due to chronic hypoxia
B. Hyperplasia of carbonic anhydrase-producing intercalated
cells
C. Metaplasia of the proximal convoluted tubule epithelium
D. Apoptosis induced by persistent intracellular acidosis
CORRECT ANSWER: B
RATiONAlE: The patient is experiencing respiratory
, acidosis. In response to chronic elevation of PaCO2, the
kidneys compensate by increasing the excretion of
hydrogen ions and reabsorbing bicarbonate. This is
accomplished by the hypertrophy and hyperplasia of type A
intercalated cells within the collecting ducts, which actively
secrete H+ via H+-ATPase pumps and generate new HCO3-
.
2. During ischemia, the failure of the plasma membrane
sodium-potassium adenosine triphosphatase (Na+/K+-
ATPase) pump leads directly to which intracellular shift?
A. Influx of sodium and water, causing cellular swelling
B. Efflux of calcium into the extracellular space
C. Influx of potassium, leading to intracellular
hyperosmolality
D. Efflux of hydrogen ions, causing intracellular alkalosis
CORRECT ANSWER: A
RATiONAlE: Ischemia impairs oxidative
phosphorylation, depleting cellular ATP. Without ATP, the
Na+/K+-ATPase pump fails. Sodium accumulates inside the
cell, creating an osmotic gradient that draws water inward,
resulting in acute cellular swelling (onchosis). Potassium
leaks out of the cell, and calcium influxes into the cytoplasm.
3. A 45-year-old female is diagnosed with hashimoto
thyroiditis. Biopsy of the thyroid tissue demonstrates an
abundance of lymphocytes and plasma cells destroying the
parenchymal tissue. Which mechanism of cell death is
primarily driving the tissue destruction seen in this
autoimmune disorder?
A. Liquefactive necrosis
, B. Coagulative necrosis
C. Apoptosis via the extrinsic pathway
D. Caseous necrosis
CORRECT ANSWER: C
RATiONAlE: Autoimmune destruction in Hashimoto
thyroiditis is primarily mediated by cytotoxic T
lymphocytes (CD8+) and cytokines that activate the
extrinsic pathway of apoptosis (Fas/FasL interaction) or
via perforin/granzyme delivery, leading to programmed
cell death of thyroid follicular cells rather than widespread
accidental necrosis.
4. A 28-year-old male presents with severe muscle weakness,
cramping, and an abnormal electrocardiogram (ECG)
showing flattened T waves and prominent U waves. His
serum potassium level is 2.4 mEq/L. Which
pathophysiological mechanism best explains the
hyperpolarization of the myocardial cell membrane in this
patient?
A. The resting membrane potential becomes more positive,
bringing it closer to the threshold.
B. The resting membrane potential becomes more negative,
moving it further from the threshold.
C. The threshold potential shifts upward, requiring a
stronger stimulus to depolarize.
D. The phase 0 depolarization is accelerated due to increased
sodium permeability.
CORRECT ANSWER: B
RATiONAlE: Hypokalemia increases the concentration
, gradient for potassium across the cell membrane, causing
more potassium to leave the cell via leak channels. This
increases the negativity of the intracellular environment,
shifting the resting membrane potential further away from
the threshold potential (hyperpolarization), making cells
less excitable and delaying repolarization.
5. A 72-year-old female with a history of breast cancer develops
severe lethargy, confusion, and a shortened QT interval on
her ECG. Her serum calcium is 14.2 mg/dL. Which
underlying mechanism of hypercalcemia is most commonly
associated with solid tumor malignancies without bony
metastasis?
A. Secretion of parathyroid hormone-related peptide
(PTHrP)
B. Direct osteolytic bone destruction by tumor cells
C. Excess dietary absorption via tumor-induced Vitamin D
activation
D. Decreased renal clearance of calcium due to SIADH
CORRECT ANSWER: A
RATiONAlE: Humoral hypercalcemia of malignancy is
most frequently caused by the tumor secretion of PTHrP,
which mimics parathyroid hormone (PTH) by activating
PTH receptors in bone and kidney, stimulating osteoclastic
bone resorption and renal calcium reabsorption.
6. Which statement accurately describes the pathophysiological
role of oncogenes in carcinogenesis?
A. They are inactivated genes that normally inhibit cell
proliferation.
B. They are mutated proto-oncogenes that promote
PATHOPHYSIOLOGY MASTER
EXAM 150 QUESTIONS AND
ANSWERS WITH
COMPREHENSIVE CLINICAL
RATIONALES LATEST 2026 2027
GUIDE
Advanced Pathophysiology Exam
1. A 64-year-old male with a history of severe chronic
obstructive pulmonary disease (COPD) is admitted with
acute respiratory failure. His arterial blood gas (ABG) reveals
a pH of 7.22, PaCO2 of 68 mmHg, and HCO3- of 28 mEq/L.
Which cellular adaptation or response is most likely
occurring in his renal tubular epithelial cells to compensate
for this chronic state?
A. Atrophy due to chronic hypoxia
B. Hyperplasia of carbonic anhydrase-producing intercalated
cells
C. Metaplasia of the proximal convoluted tubule epithelium
D. Apoptosis induced by persistent intracellular acidosis
CORRECT ANSWER: B
RATiONAlE: The patient is experiencing respiratory
, acidosis. In response to chronic elevation of PaCO2, the
kidneys compensate by increasing the excretion of
hydrogen ions and reabsorbing bicarbonate. This is
accomplished by the hypertrophy and hyperplasia of type A
intercalated cells within the collecting ducts, which actively
secrete H+ via H+-ATPase pumps and generate new HCO3-
.
2. During ischemia, the failure of the plasma membrane
sodium-potassium adenosine triphosphatase (Na+/K+-
ATPase) pump leads directly to which intracellular shift?
A. Influx of sodium and water, causing cellular swelling
B. Efflux of calcium into the extracellular space
C. Influx of potassium, leading to intracellular
hyperosmolality
D. Efflux of hydrogen ions, causing intracellular alkalosis
CORRECT ANSWER: A
RATiONAlE: Ischemia impairs oxidative
phosphorylation, depleting cellular ATP. Without ATP, the
Na+/K+-ATPase pump fails. Sodium accumulates inside the
cell, creating an osmotic gradient that draws water inward,
resulting in acute cellular swelling (onchosis). Potassium
leaks out of the cell, and calcium influxes into the cytoplasm.
3. A 45-year-old female is diagnosed with hashimoto
thyroiditis. Biopsy of the thyroid tissue demonstrates an
abundance of lymphocytes and plasma cells destroying the
parenchymal tissue. Which mechanism of cell death is
primarily driving the tissue destruction seen in this
autoimmune disorder?
A. Liquefactive necrosis
, B. Coagulative necrosis
C. Apoptosis via the extrinsic pathway
D. Caseous necrosis
CORRECT ANSWER: C
RATiONAlE: Autoimmune destruction in Hashimoto
thyroiditis is primarily mediated by cytotoxic T
lymphocytes (CD8+) and cytokines that activate the
extrinsic pathway of apoptosis (Fas/FasL interaction) or
via perforin/granzyme delivery, leading to programmed
cell death of thyroid follicular cells rather than widespread
accidental necrosis.
4. A 28-year-old male presents with severe muscle weakness,
cramping, and an abnormal electrocardiogram (ECG)
showing flattened T waves and prominent U waves. His
serum potassium level is 2.4 mEq/L. Which
pathophysiological mechanism best explains the
hyperpolarization of the myocardial cell membrane in this
patient?
A. The resting membrane potential becomes more positive,
bringing it closer to the threshold.
B. The resting membrane potential becomes more negative,
moving it further from the threshold.
C. The threshold potential shifts upward, requiring a
stronger stimulus to depolarize.
D. The phase 0 depolarization is accelerated due to increased
sodium permeability.
CORRECT ANSWER: B
RATiONAlE: Hypokalemia increases the concentration
, gradient for potassium across the cell membrane, causing
more potassium to leave the cell via leak channels. This
increases the negativity of the intracellular environment,
shifting the resting membrane potential further away from
the threshold potential (hyperpolarization), making cells
less excitable and delaying repolarization.
5. A 72-year-old female with a history of breast cancer develops
severe lethargy, confusion, and a shortened QT interval on
her ECG. Her serum calcium is 14.2 mg/dL. Which
underlying mechanism of hypercalcemia is most commonly
associated with solid tumor malignancies without bony
metastasis?
A. Secretion of parathyroid hormone-related peptide
(PTHrP)
B. Direct osteolytic bone destruction by tumor cells
C. Excess dietary absorption via tumor-induced Vitamin D
activation
D. Decreased renal clearance of calcium due to SIADH
CORRECT ANSWER: A
RATiONAlE: Humoral hypercalcemia of malignancy is
most frequently caused by the tumor secretion of PTHrP,
which mimics parathyroid hormone (PTH) by activating
PTH receptors in bone and kidney, stimulating osteoclastic
bone resorption and renal calcium reabsorption.
6. Which statement accurately describes the pathophysiological
role of oncogenes in carcinogenesis?
A. They are inactivated genes that normally inhibit cell
proliferation.
B. They are mutated proto-oncogenes that promote
