NR 507 MIDTERM EXAM – ADVANCED
PATHOPHYSIOLOGY EXAMINATION
QUESTIONS AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR JUST RELEASED
Exam Coverage Areas
1. Cellular Injury, Adaptation, and Death – Mechanisms of reversible and irreversible cell injury,
apoptosis, necrosis, oxidative stress, and cellular adaptations.
2. Inflammation and Immune Responses – Acute and chronic inflammation, inflammatory
mediators, complement, hypersensitivity, autoimmunity, and immune dysfunction.
3. Genetic and Molecular Disorders – Genetic mutations, inheritance patterns, chromosomal
abnormalities, epigenetics, and molecular mechanisms contributing to disease.
4. Fluid, Electrolyte, and Acid-Base Disorders – Regulation of body fluids, sodium and potassium
abnormalities, osmolality, acid-base disturbances, and compensatory mechanisms.
5. Cardiovascular Pathophysiology – Hypertension, atherosclerosis, ischemia, heart failure, shock,
vascular disease, and mechanisms of cardiac dysfunction.
6. Respiratory Pathophysiology – Ventilation and perfusion abnormalities, gas exchange,
obstructive and restrictive diseases, respiratory failure, and pulmonary vascular disorders.
7. Renal and Urinary Disorders – Glomerular disease, acute kidney injury, chronic kidney disease,
acid-base regulation, and mechanisms of renal dysfunction.
8. Endocrine and Metabolic Disorders – Hormonal regulation and disorders involving the thyroid,
adrenal glands, pancreas, calcium metabolism, and glucose homeostasis.
9. Neurologic Pathophysiology – Neuronal injury, intracranial pressure, seizures, cerebrovascular
disease, neurodegeneration, and disorders of the central nervous system.
10. Neoplasia and Cancer Biology – Cellular transformation, oncogenes, tumor suppressor genes,
angiogenesis, invasion, metastasis, and systemic effects of malignancy.
NR 507 Midterm Exam – Advanced Pathophysiology
1. A patient experiences prolonged cellular hypoxia that disrupts mitochondrial
ATP production and eventually causes irreversible cellular damage. Which
process occurs first?
,A. Increased oxidative phosphorylation
B. Failure of the sodium-potassium pump
C. Increased intracellular protein synthesis
D. Enhanced mitochondrial ATP production
Answer: B. Failure of the sodium-potassium pump
Rationale: ATP depletion impairs the sodium-potassium pump, causing
intracellular sodium and water accumulation, cellular swelling, and early
reversible injury.
2. During early reversible cellular injury caused by ischemia, which intracellular
change most directly reflects impaired energy metabolism?
A. Increased intracellular ATP concentration
B. Decreased anaerobic glycolysis
C. Increased lactic acid production
D. Increased mitochondrial oxidative phosphorylation
Answer: C. Increased lactic acid production
Rationale: Ischemia decreases oxygen-dependent oxidative phosphorylation,
forcing cells to rely more heavily on anaerobic glycolysis, which increases lactic
acid production.
3. Which cellular adaptation allows an organ to increase individual cell size
when subjected to increased workload or hormonal stimulation?
A. Hyperplasia
B. Hypertrophy
C. Atrophy
D. Metaplasia
Answer: B. Hypertrophy
,Rationale: Hypertrophy involves enlargement of individual cells and commonly
occurs in tissues with limited ability to undergo cell division, such as cardiac
muscle.
4. A chronic irritant causes replacement of normal bronchial columnar
epithelium with stratified squamous epithelium. Which adaptive process is
demonstrated?
A. Dysplasia
B. Hyperplasia
C. Metaplasia
D. Hypertrophy
Answer: C. Metaplasia
Rationale: Metaplasia is a reversible adaptive change in which one mature
differentiated cell type is replaced by another better suited to withstand chronic
stress.
5. Which characteristic best distinguishes apoptosis from necrosis when
describing mechanisms of programmed cellular death?
A. Apoptosis typically causes extensive surrounding inflammation
B. Apoptosis involves uncontrolled cellular swelling
C. Apoptosis occurs through regulated cellular signaling pathways
D. Apoptosis always results from severe ischemic injury
Answer: C. Apoptosis occurs through regulated cellular signaling pathways
Rationale: Apoptosis is programmed, regulated cell death involving caspase
activation and cellular fragmentation with minimal inflammatory response.
, 6. Which mechanism contributes most directly to cellular injury when reactive
oxygen species overwhelm endogenous antioxidant defense systems?
A. Oxidative stress causing lipid, protein, and DNA damage
B. Increased ATP synthesis through oxidative phosphorylation
C. Enhanced cellular membrane stabilization
D. Reduced mitochondrial permeability
Answer: A. Oxidative stress causing lipid, protein, and DNA damage
Rationale: Excess reactive oxygen species can damage membrane lipids, proteins,
and nucleic acids, contributing significantly to cellular dysfunction and death.
7. A patient develops acute inflammation following tissue injury. Which vascular
change occurs earliest during the inflammatory response?
A. Persistent arteriolar vasoconstriction
B. Immediate widespread venous thrombosis
C. Transient arteriolar vasoconstriction followed by vasodilation
D. Complete vascular obstruction
Answer: C. Transient arteriolar vasoconstriction followed by vasodilation
Rationale: Acute inflammation begins with brief vasoconstriction followed by
arteriolar vasodilation, increasing blood flow and producing redness and warmth.
8. Which inflammatory mediator is primarily responsible for increasing vascular
permeability during the early phase of acute inflammation?
A. Histamine
B. Insulin
C. Erythropoietin
D. Thyroxine
Answer: A. Histamine
PATHOPHYSIOLOGY EXAMINATION
QUESTIONS AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR JUST RELEASED
Exam Coverage Areas
1. Cellular Injury, Adaptation, and Death – Mechanisms of reversible and irreversible cell injury,
apoptosis, necrosis, oxidative stress, and cellular adaptations.
2. Inflammation and Immune Responses – Acute and chronic inflammation, inflammatory
mediators, complement, hypersensitivity, autoimmunity, and immune dysfunction.
3. Genetic and Molecular Disorders – Genetic mutations, inheritance patterns, chromosomal
abnormalities, epigenetics, and molecular mechanisms contributing to disease.
4. Fluid, Electrolyte, and Acid-Base Disorders – Regulation of body fluids, sodium and potassium
abnormalities, osmolality, acid-base disturbances, and compensatory mechanisms.
5. Cardiovascular Pathophysiology – Hypertension, atherosclerosis, ischemia, heart failure, shock,
vascular disease, and mechanisms of cardiac dysfunction.
6. Respiratory Pathophysiology – Ventilation and perfusion abnormalities, gas exchange,
obstructive and restrictive diseases, respiratory failure, and pulmonary vascular disorders.
7. Renal and Urinary Disorders – Glomerular disease, acute kidney injury, chronic kidney disease,
acid-base regulation, and mechanisms of renal dysfunction.
8. Endocrine and Metabolic Disorders – Hormonal regulation and disorders involving the thyroid,
adrenal glands, pancreas, calcium metabolism, and glucose homeostasis.
9. Neurologic Pathophysiology – Neuronal injury, intracranial pressure, seizures, cerebrovascular
disease, neurodegeneration, and disorders of the central nervous system.
10. Neoplasia and Cancer Biology – Cellular transformation, oncogenes, tumor suppressor genes,
angiogenesis, invasion, metastasis, and systemic effects of malignancy.
NR 507 Midterm Exam – Advanced Pathophysiology
1. A patient experiences prolonged cellular hypoxia that disrupts mitochondrial
ATP production and eventually causes irreversible cellular damage. Which
process occurs first?
,A. Increased oxidative phosphorylation
B. Failure of the sodium-potassium pump
C. Increased intracellular protein synthesis
D. Enhanced mitochondrial ATP production
Answer: B. Failure of the sodium-potassium pump
Rationale: ATP depletion impairs the sodium-potassium pump, causing
intracellular sodium and water accumulation, cellular swelling, and early
reversible injury.
2. During early reversible cellular injury caused by ischemia, which intracellular
change most directly reflects impaired energy metabolism?
A. Increased intracellular ATP concentration
B. Decreased anaerobic glycolysis
C. Increased lactic acid production
D. Increased mitochondrial oxidative phosphorylation
Answer: C. Increased lactic acid production
Rationale: Ischemia decreases oxygen-dependent oxidative phosphorylation,
forcing cells to rely more heavily on anaerobic glycolysis, which increases lactic
acid production.
3. Which cellular adaptation allows an organ to increase individual cell size
when subjected to increased workload or hormonal stimulation?
A. Hyperplasia
B. Hypertrophy
C. Atrophy
D. Metaplasia
Answer: B. Hypertrophy
,Rationale: Hypertrophy involves enlargement of individual cells and commonly
occurs in tissues with limited ability to undergo cell division, such as cardiac
muscle.
4. A chronic irritant causes replacement of normal bronchial columnar
epithelium with stratified squamous epithelium. Which adaptive process is
demonstrated?
A. Dysplasia
B. Hyperplasia
C. Metaplasia
D. Hypertrophy
Answer: C. Metaplasia
Rationale: Metaplasia is a reversible adaptive change in which one mature
differentiated cell type is replaced by another better suited to withstand chronic
stress.
5. Which characteristic best distinguishes apoptosis from necrosis when
describing mechanisms of programmed cellular death?
A. Apoptosis typically causes extensive surrounding inflammation
B. Apoptosis involves uncontrolled cellular swelling
C. Apoptosis occurs through regulated cellular signaling pathways
D. Apoptosis always results from severe ischemic injury
Answer: C. Apoptosis occurs through regulated cellular signaling pathways
Rationale: Apoptosis is programmed, regulated cell death involving caspase
activation and cellular fragmentation with minimal inflammatory response.
, 6. Which mechanism contributes most directly to cellular injury when reactive
oxygen species overwhelm endogenous antioxidant defense systems?
A. Oxidative stress causing lipid, protein, and DNA damage
B. Increased ATP synthesis through oxidative phosphorylation
C. Enhanced cellular membrane stabilization
D. Reduced mitochondrial permeability
Answer: A. Oxidative stress causing lipid, protein, and DNA damage
Rationale: Excess reactive oxygen species can damage membrane lipids, proteins,
and nucleic acids, contributing significantly to cellular dysfunction and death.
7. A patient develops acute inflammation following tissue injury. Which vascular
change occurs earliest during the inflammatory response?
A. Persistent arteriolar vasoconstriction
B. Immediate widespread venous thrombosis
C. Transient arteriolar vasoconstriction followed by vasodilation
D. Complete vascular obstruction
Answer: C. Transient arteriolar vasoconstriction followed by vasodilation
Rationale: Acute inflammation begins with brief vasoconstriction followed by
arteriolar vasodilation, increasing blood flow and producing redness and warmth.
8. Which inflammatory mediator is primarily responsible for increasing vascular
permeability during the early phase of acute inflammation?
A. Histamine
B. Insulin
C. Erythropoietin
D. Thyroxine
Answer: A. Histamine
