NR507 Advanced Pathophysiology Exam Bank (Questions 1–
10)
Question 1
A patient presents with severe peripheral edema and tachycardia. Diagnostic
imaging reveals cardiac hypertrophy. Which cellular alteration mechanism
represents the initial response of myocardial cells to chronic hemodynamic
overload?
A. Hyperplasia
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Rationale: Myocardial cells are permanent cells that cannot undergo division
(hyperplasia). Instead, they adapt to chronic increased workloads or
hemodynamic overload by increasing in individual cell size (hypertrophy) to
synthesize more structural proteins.
Question 2
During myocardial ischemia, a lack of oxygen shifts cellular metabolism from
aerobic to anaerobic pathways. Which immediate intracellular change occurs
as a direct result of a failing sodium-potassium (Na+/K+) ATPase pump?
A. Intracellular accumulation of sodium and water causing cell swelling
B. Intracellular accumulation of potassium causing cell shrinkage
C. Extracellular accumulation of sodium causing cell dehydration
D. Increased intracellular pH due to lactic acid clearance
Rationale: Depletion of ATP causes the Na+/K+ pump to fail. Sodium floods into
the cell, and because water follows sodium osmotically, acute cellular swelling
, occurs. Anaerobic glycolysis also produces lactic acid, dropping intracellular
pH.
Question 3
A 54-year-old patient with a long history of acid reflux (GERD) undergoes an
endoscopy. The pathology report notes that the normal stratified squamous
epithelium of the lower esophagus has been replaced by simple columnar
epithelium. What is this cellular adaptation called?
A. Atrophy
B. Anaplasia
C. Metaplasia
D. Dysplasia
Rationale: Metaplasia is the reversible replacement of one mature cell type by
another mature cell type, often driven by chronic irritation or inflammation like
gastric acid exposure.
Question 4
A lab report for an asymptomatic patient reveals a serum calcium level of 12.2
mg/dL (hypercalcemia) secondary to primary hyperparathyroidism. If this
condition is left untreated, where is metastatic calcification most likely to occur
first?
A. Skeletal muscle tissue
B. Deep vein valves of the lower extremities
C. Alveolar walls of the lungs and renal tubules
D. Epidermal layers of the skin
Rationale: Metastatic calcification occurs in normal tissues during
hypercalcemia. It primarily targets acid-excreting organs like the lungs,
kidneys, and gastric mucosa, because the local alkaline environment
predisposes them to calcium precipitation.
Question 5
Which of the following compensatory mechanisms does the kidney activate
during chronic renal hypoperfusion to maintain the glomerular filtration rate
(GFR)?
A. Inhibition of aldosterone secretion
B. Vasodilation of the afferent arteriole via Thromboxane A2
C. Vasoconstriction of the efferent arteriole via Angiotensin II
D. Excretion of excess sodium in the distal convoluted tubule
Rationale: When renal perfusion drops, the renin-angiotensin-aldosterone
system (RAAS) triggers the release of Angiotensin II. Angiotensin II
preferentially constricts the efferent arteriole, increasing glomerular hydrostatic
pressure to preserve GFR.
Question 6
A patient with chronic kidney disease (CKD) presents with a low hemoglobin
level, fatigue, and weakness. What is the primary pathophysiological cause of
this patient's anemia?
A. Chronic occult gastrointestinal bleeding
B. Deficient erythropoietin production by peritubular capillary cells
C. Premature destruction of red blood cells due to metabolic acidosis
, D. Poor dietary absorption of vitamin B12 in the distal ileum
Rationale: The kidneys produce erythropoietin (EPO), a hormone that
stimulates red blood cell production in the bone marrow. In CKD, functional
renal tissue is lost, causing an EPO deficiency and subsequent normocytic,
normochromic anemia.
Question 7
A 65-year-old male is admitted with an acute myocardial infarction. Within
hours, his arterial blood gas (ABG) analysis shows a pH of 7.21, PaCO2 of 38
mmHg, and HCO3- of 15 mEq/L. How should the clinician classify this acid-base
imbalance?
A. Uncompensated metabolic acidosis
B. Fully compensated respiratory acidosis
C. Partially compensated metabolic alkalosis
D. Uncompensated respiratory alkalosis
Rationale: The pH is low (<7.35) indicating acidosis. The HCO3- is low (<22
mEq/L), which aligns with the acidosis (metabolic). The PaCO2 is within the
normal range (35–45 mmHg), meaning the respiratory system has not yet
compensated.
Question 8
Which clinical sign represents a classic indicator of severe hypocalcemia and
neuromuscular irritability, demonstrated by tapping the facial nerve anterior to
the earlobe?
A. Trousseau's sign
B. Chvostek's sign
C. Kernig's sign
D. Homans' sign
Rationale: Chvostek's sign is positive when tapping the facial nerve induces
hyperreactive twitching of the facial muscles, signaling hypocalcemia.
Trousseau's sign is also for hypocalcemia but involves carpal spasms induced
by a blood pressure cuff.
Question 9
In the pathophysiology of Type 1 Diabetes Mellitus, what is the primary
mechanism responsible for the destruction of pancreatic beta cells?
A. Insignificant dietary intake of essential amino acids
B. Insulin resistance in peripheral skeletal muscle tissue
C. T-cell mediated autoimmune destruction of beta-cell antigens
D. Chronic low-grade inflammation from obesity-induced cytokines
Rationale: Type 1 Diabetes is an autoimmune disorder where self-reactive T-
lymphocytes (cell-mediated immunity) target and systematically destroy
insulin-producing beta cells in the islets of Langerhans.
Question 10
A patient in the intensive care unit develops a severe systemic infection that
leads to septic shock. What is the primary driver of the profound, refractory
hypotension characteristic of distributive septic shock?
A. Mechanical obstruction of blood flow out of the left ventricle
B. Direct loss of circulating intravascular blood volume
, C. Massive systemic vasodilation induced by nitric oxide and inflammatory
cytokines
D. Loss of sympathetic vasomotor tone due to a high spinal cord injury
Rationale: In septic shock, endotoxins release huge amounts of inflammatory
cytokines (like TNF-alpha, IL-1, and nitric oxide). These cause profound,
widespread systemic vasodilation and increased capillary permeability, leading
to relative hypovolemia.
NR507 Advanced Pathophysiology Exam Bank (Questions 11–
40)
Question 11
A 45-year-old female presents with severe fatigue, weight gain, cold
intolerance, and a sluggish deep tendon reflex. Laboratory results reveal an
elevated TSH and a low free T4. Which condition is the most likely diagnosis?
A. Graves' disease
B. Hashimoto's thyroiditis
C. Primary hyperparathyroidism
D. Cushing's syndrome
Rationale: Hashimoto's thyroiditis is an autoimmune destruction of the thyroid
gland, leading to primary hypothyroidism. The pituitary gland attempts to
stimulate production by releasing high levels of TSH, but the damaged thyroid
cannot produce adequate T4.
Question 12
A patient is diagnosed with secondary hyperparathyroidism. Which chronic
organ failure is most tightly linked to this pathophysiological feedback loop?
A. Hepatic failure
B. Congestive heart failure
C. Chronic kidney disease
D. Chronic obstructive pulmonary disease
Rationale: In chronic kidney disease, the loss of vitamin D activation and
phosphorus retention drops serum calcium levels. This chronic hypocalcemia
continually overstimulates the parathyroid glands to secrete parathyroid
hormone (PTH).
Question 13
Which of the following describes the fundamental pathophysiology causing
Type 2 Diabetes Mellitus?
A. Absolute insulin deficiency from autoimmune beta-cell destruction
B. Peripheral insulin resistance combined with a progressive decrease in
insulin secretion
C. Autonomous hypersecretion of glucagon by pancreatic alpha cells
D. Decreased absorption of dietary glucose within the small intestine
Rationale: Type 2 Diabetes is characterized by insulin resistance, where target
10)
Question 1
A patient presents with severe peripheral edema and tachycardia. Diagnostic
imaging reveals cardiac hypertrophy. Which cellular alteration mechanism
represents the initial response of myocardial cells to chronic hemodynamic
overload?
A. Hyperplasia
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Rationale: Myocardial cells are permanent cells that cannot undergo division
(hyperplasia). Instead, they adapt to chronic increased workloads or
hemodynamic overload by increasing in individual cell size (hypertrophy) to
synthesize more structural proteins.
Question 2
During myocardial ischemia, a lack of oxygen shifts cellular metabolism from
aerobic to anaerobic pathways. Which immediate intracellular change occurs
as a direct result of a failing sodium-potassium (Na+/K+) ATPase pump?
A. Intracellular accumulation of sodium and water causing cell swelling
B. Intracellular accumulation of potassium causing cell shrinkage
C. Extracellular accumulation of sodium causing cell dehydration
D. Increased intracellular pH due to lactic acid clearance
Rationale: Depletion of ATP causes the Na+/K+ pump to fail. Sodium floods into
the cell, and because water follows sodium osmotically, acute cellular swelling
, occurs. Anaerobic glycolysis also produces lactic acid, dropping intracellular
pH.
Question 3
A 54-year-old patient with a long history of acid reflux (GERD) undergoes an
endoscopy. The pathology report notes that the normal stratified squamous
epithelium of the lower esophagus has been replaced by simple columnar
epithelium. What is this cellular adaptation called?
A. Atrophy
B. Anaplasia
C. Metaplasia
D. Dysplasia
Rationale: Metaplasia is the reversible replacement of one mature cell type by
another mature cell type, often driven by chronic irritation or inflammation like
gastric acid exposure.
Question 4
A lab report for an asymptomatic patient reveals a serum calcium level of 12.2
mg/dL (hypercalcemia) secondary to primary hyperparathyroidism. If this
condition is left untreated, where is metastatic calcification most likely to occur
first?
A. Skeletal muscle tissue
B. Deep vein valves of the lower extremities
C. Alveolar walls of the lungs and renal tubules
D. Epidermal layers of the skin
Rationale: Metastatic calcification occurs in normal tissues during
hypercalcemia. It primarily targets acid-excreting organs like the lungs,
kidneys, and gastric mucosa, because the local alkaline environment
predisposes them to calcium precipitation.
Question 5
Which of the following compensatory mechanisms does the kidney activate
during chronic renal hypoperfusion to maintain the glomerular filtration rate
(GFR)?
A. Inhibition of aldosterone secretion
B. Vasodilation of the afferent arteriole via Thromboxane A2
C. Vasoconstriction of the efferent arteriole via Angiotensin II
D. Excretion of excess sodium in the distal convoluted tubule
Rationale: When renal perfusion drops, the renin-angiotensin-aldosterone
system (RAAS) triggers the release of Angiotensin II. Angiotensin II
preferentially constricts the efferent arteriole, increasing glomerular hydrostatic
pressure to preserve GFR.
Question 6
A patient with chronic kidney disease (CKD) presents with a low hemoglobin
level, fatigue, and weakness. What is the primary pathophysiological cause of
this patient's anemia?
A. Chronic occult gastrointestinal bleeding
B. Deficient erythropoietin production by peritubular capillary cells
C. Premature destruction of red blood cells due to metabolic acidosis
, D. Poor dietary absorption of vitamin B12 in the distal ileum
Rationale: The kidneys produce erythropoietin (EPO), a hormone that
stimulates red blood cell production in the bone marrow. In CKD, functional
renal tissue is lost, causing an EPO deficiency and subsequent normocytic,
normochromic anemia.
Question 7
A 65-year-old male is admitted with an acute myocardial infarction. Within
hours, his arterial blood gas (ABG) analysis shows a pH of 7.21, PaCO2 of 38
mmHg, and HCO3- of 15 mEq/L. How should the clinician classify this acid-base
imbalance?
A. Uncompensated metabolic acidosis
B. Fully compensated respiratory acidosis
C. Partially compensated metabolic alkalosis
D. Uncompensated respiratory alkalosis
Rationale: The pH is low (<7.35) indicating acidosis. The HCO3- is low (<22
mEq/L), which aligns with the acidosis (metabolic). The PaCO2 is within the
normal range (35–45 mmHg), meaning the respiratory system has not yet
compensated.
Question 8
Which clinical sign represents a classic indicator of severe hypocalcemia and
neuromuscular irritability, demonstrated by tapping the facial nerve anterior to
the earlobe?
A. Trousseau's sign
B. Chvostek's sign
C. Kernig's sign
D. Homans' sign
Rationale: Chvostek's sign is positive when tapping the facial nerve induces
hyperreactive twitching of the facial muscles, signaling hypocalcemia.
Trousseau's sign is also for hypocalcemia but involves carpal spasms induced
by a blood pressure cuff.
Question 9
In the pathophysiology of Type 1 Diabetes Mellitus, what is the primary
mechanism responsible for the destruction of pancreatic beta cells?
A. Insignificant dietary intake of essential amino acids
B. Insulin resistance in peripheral skeletal muscle tissue
C. T-cell mediated autoimmune destruction of beta-cell antigens
D. Chronic low-grade inflammation from obesity-induced cytokines
Rationale: Type 1 Diabetes is an autoimmune disorder where self-reactive T-
lymphocytes (cell-mediated immunity) target and systematically destroy
insulin-producing beta cells in the islets of Langerhans.
Question 10
A patient in the intensive care unit develops a severe systemic infection that
leads to septic shock. What is the primary driver of the profound, refractory
hypotension characteristic of distributive septic shock?
A. Mechanical obstruction of blood flow out of the left ventricle
B. Direct loss of circulating intravascular blood volume
, C. Massive systemic vasodilation induced by nitric oxide and inflammatory
cytokines
D. Loss of sympathetic vasomotor tone due to a high spinal cord injury
Rationale: In septic shock, endotoxins release huge amounts of inflammatory
cytokines (like TNF-alpha, IL-1, and nitric oxide). These cause profound,
widespread systemic vasodilation and increased capillary permeability, leading
to relative hypovolemia.
NR507 Advanced Pathophysiology Exam Bank (Questions 11–
40)
Question 11
A 45-year-old female presents with severe fatigue, weight gain, cold
intolerance, and a sluggish deep tendon reflex. Laboratory results reveal an
elevated TSH and a low free T4. Which condition is the most likely diagnosis?
A. Graves' disease
B. Hashimoto's thyroiditis
C. Primary hyperparathyroidism
D. Cushing's syndrome
Rationale: Hashimoto's thyroiditis is an autoimmune destruction of the thyroid
gland, leading to primary hypothyroidism. The pituitary gland attempts to
stimulate production by releasing high levels of TSH, but the damaged thyroid
cannot produce adequate T4.
Question 12
A patient is diagnosed with secondary hyperparathyroidism. Which chronic
organ failure is most tightly linked to this pathophysiological feedback loop?
A. Hepatic failure
B. Congestive heart failure
C. Chronic kidney disease
D. Chronic obstructive pulmonary disease
Rationale: In chronic kidney disease, the loss of vitamin D activation and
phosphorus retention drops serum calcium levels. This chronic hypocalcemia
continually overstimulates the parathyroid glands to secrete parathyroid
hormone (PTH).
Question 13
Which of the following describes the fundamental pathophysiology causing
Type 2 Diabetes Mellitus?
A. Absolute insulin deficiency from autoimmune beta-cell destruction
B. Peripheral insulin resistance combined with a progressive decrease in
insulin secretion
C. Autonomous hypersecretion of glucagon by pancreatic alpha cells
D. Decreased absorption of dietary glucose within the small intestine
Rationale: Type 2 Diabetes is characterized by insulin resistance, where target
