1
Exam 1: NSG530/ NSG 530 (NEW 2025/ 2026 Update)
Advanced Pathophysiology Review | Questions &
Answers | Grade A | 100% Correct (Verified
Solutions) - Wilkes
Exam 1: Foundations of Pathophysiology, Cellular Function & Immunity
Part 1: Cellular Injury & Adaptations
Q1: A patient with chronic alcoholism presents with confusion, ataxia, and ophthalmoplegia.
This triad is characteristic of Wernicke's encephalopathy. Which cellular process is most
directly affected?
• A) Oxidative phosphorylation in the mitochondria
• B) Thiamine-dependent enzymatic reactions in the Krebs cycle
• C) DNA repair mechanisms in the nucleus
• D) Ribosomal protein synthesis
• ☑ Correct Answer: B) Thiamine-dependent enzymatic reactions in the Krebs
cycle
• Rationale: Wernicke's encephalopathy results from thiamine (vitamin B1) deficiency.
Thiamine is a critical cofactor for pyruvate dehydrogenase and alpha-ketoglutarate
dehydrogenase in the Krebs cycle. Without it, energy production in neurons is impaired .
Q2: What is the single most common cause of cellular injury?
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• ☑ Correct Answer: Hypoxic injury (lack of sufficient oxygen within cells)
• Rationale: Hypoxia is the most frequent cause of cellular injury, often resulting from
ischemia (reduced blood supply), which leads to decreased ATP production and cellular
dysfunction .
Q3: What term describes the total lack of oxygen in tissues?
• ☑ Correct Answer: Anoxia
• Rationale: Anoxia represents the complete absence of oxygen, which progressive
hypoxia ultimately leads to if not corrected .
Q4: What is reperfusion injury?
• ☑ Correct Answer: Tissue damage that occurs when blood supply returns to
tissue after a period of ischemia
• Rationale: Reperfusion injury occurs because the sudden reintroduction of oxygen to
ischemic tissues causes the formation of reactive oxygen species (ROS), leading to
further cellular damage. The mitochondrial electron transport chain becomes
dysfunctional, producing harmful ROS instead of ATP .
Q5: A biopsy of a chronic wound shows abundant granulation tissue with many small blood
vessels and fibroblasts. This phase of wound healing is called:
• A) Hemostasis
• B) Inflammatory phase
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• C) Proliferative phase
• D) Maturation phase
• ☑ Correct Answer: C) Proliferative phase
• Rationale: The proliferative phase (days 3–21) is characterized by angiogenesis (new
blood vessels), fibroplasia (fibroblast proliferation), and the formation of granulation
tissue .
Part 2: Fluid & Electrolyte Disorders
Q6: Which alteration develops when the osmolality of the ECF is elevated above normal,
causing water to move out of cells?
• ☑ Correct Answer: Hypertonic alteration
• Rationale: In hypertonic alterations, too much solute exists outside the cell, so water
spills out of the cell to neutralize the concentration gradient, leading to cell shrinkage.
Common causes include dehydration .
Q7: Which alteration occurs when the osmolality of the ECF is less than normal, causing cells
to swell?
• ☑ Correct Answer: Hypotonic alteration
• Rationale: This occurs when there is too much water relative to solute outside the cell.
Common causes include sodium deficit or water intoxication .
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Q8: What is the most common cause of edema?
• ☑ Correct Answer: Filtration exceeding reabsorption
• Rationale: Edema is the excessive accumulation of fluid within the interstitial spaces. It
can be caused by increased capillary hydrostatic pressure, decreased plasma oncotic
pressure, increased capillary membrane permeability, lymphatic obstruction, or
increased tissue oncotic pressure .
Q9: What are the 5 mechanisms of edema formation?
• Answer:
1. Increased capillary hydrostatic pressure
2. Decreased plasma/capillary oncotic pressure
3. Increased capillary membrane permeability
4. Lymphatic channel obstruction
5. Increased tissue oncotic pressure
Q10: A patient presents with low ECF sodium. What condition is this, and what are its effects
on cells?
• ☑ Correct Answer: Hyponatremia. This causes cellular swelling and intracellular
deficits in Na⁺ alter the cell's ability to depolarize and repolarize normally. Causes
include water intoxication and renal failure .
Exam 1: NSG530/ NSG 530 (NEW 2025/ 2026 Update)
Advanced Pathophysiology Review | Questions &
Answers | Grade A | 100% Correct (Verified
Solutions) - Wilkes
Exam 1: Foundations of Pathophysiology, Cellular Function & Immunity
Part 1: Cellular Injury & Adaptations
Q1: A patient with chronic alcoholism presents with confusion, ataxia, and ophthalmoplegia.
This triad is characteristic of Wernicke's encephalopathy. Which cellular process is most
directly affected?
• A) Oxidative phosphorylation in the mitochondria
• B) Thiamine-dependent enzymatic reactions in the Krebs cycle
• C) DNA repair mechanisms in the nucleus
• D) Ribosomal protein synthesis
• ☑ Correct Answer: B) Thiamine-dependent enzymatic reactions in the Krebs
cycle
• Rationale: Wernicke's encephalopathy results from thiamine (vitamin B1) deficiency.
Thiamine is a critical cofactor for pyruvate dehydrogenase and alpha-ketoglutarate
dehydrogenase in the Krebs cycle. Without it, energy production in neurons is impaired .
Q2: What is the single most common cause of cellular injury?
, 2
• ☑ Correct Answer: Hypoxic injury (lack of sufficient oxygen within cells)
• Rationale: Hypoxia is the most frequent cause of cellular injury, often resulting from
ischemia (reduced blood supply), which leads to decreased ATP production and cellular
dysfunction .
Q3: What term describes the total lack of oxygen in tissues?
• ☑ Correct Answer: Anoxia
• Rationale: Anoxia represents the complete absence of oxygen, which progressive
hypoxia ultimately leads to if not corrected .
Q4: What is reperfusion injury?
• ☑ Correct Answer: Tissue damage that occurs when blood supply returns to
tissue after a period of ischemia
• Rationale: Reperfusion injury occurs because the sudden reintroduction of oxygen to
ischemic tissues causes the formation of reactive oxygen species (ROS), leading to
further cellular damage. The mitochondrial electron transport chain becomes
dysfunctional, producing harmful ROS instead of ATP .
Q5: A biopsy of a chronic wound shows abundant granulation tissue with many small blood
vessels and fibroblasts. This phase of wound healing is called:
• A) Hemostasis
• B) Inflammatory phase
, 3
• C) Proliferative phase
• D) Maturation phase
• ☑ Correct Answer: C) Proliferative phase
• Rationale: The proliferative phase (days 3–21) is characterized by angiogenesis (new
blood vessels), fibroplasia (fibroblast proliferation), and the formation of granulation
tissue .
Part 2: Fluid & Electrolyte Disorders
Q6: Which alteration develops when the osmolality of the ECF is elevated above normal,
causing water to move out of cells?
• ☑ Correct Answer: Hypertonic alteration
• Rationale: In hypertonic alterations, too much solute exists outside the cell, so water
spills out of the cell to neutralize the concentration gradient, leading to cell shrinkage.
Common causes include dehydration .
Q7: Which alteration occurs when the osmolality of the ECF is less than normal, causing cells
to swell?
• ☑ Correct Answer: Hypotonic alteration
• Rationale: This occurs when there is too much water relative to solute outside the cell.
Common causes include sodium deficit or water intoxication .
, 4
Q8: What is the most common cause of edema?
• ☑ Correct Answer: Filtration exceeding reabsorption
• Rationale: Edema is the excessive accumulation of fluid within the interstitial spaces. It
can be caused by increased capillary hydrostatic pressure, decreased plasma oncotic
pressure, increased capillary membrane permeability, lymphatic obstruction, or
increased tissue oncotic pressure .
Q9: What are the 5 mechanisms of edema formation?
• Answer:
1. Increased capillary hydrostatic pressure
2. Decreased plasma/capillary oncotic pressure
3. Increased capillary membrane permeability
4. Lymphatic channel obstruction
5. Increased tissue oncotic pressure
Q10: A patient presents with low ECF sodium. What condition is this, and what are its effects
on cells?
• ☑ Correct Answer: Hyponatremia. This causes cellular swelling and intracellular
deficits in Na⁺ alter the cell's ability to depolarize and repolarize normally. Causes
include water intoxication and renal failure .
