1
NURS 6501 – Advanced Pathophysiology
(Latest 2025/2026 Update) – Midterm
Exam Review with Verified Questions
and Answers
1. What is the primary cellular process responsible for tissue damage in acute
myocardial infarction?
• Apoptosis
• Necrosis
• Autophagy
• Hyperplasia
Rationale: Acute myocardial infarction (AMI) results from prolonged ischemia,
leading to ATP depletion and irreversible myocyte necrosis (AHA, 2025). Necrosis
causes cell membrane rupture and inflammation, unlike apoptosis (programmed
cell death) or autophagy (cellular recycling). Hyperplasia involves cell
proliferation, not damage. Clinical correlation: Elevated troponin confirms
necrosis; reperfusion therapy is critical.
2. In type 1 diabetes mellitus, what is the primary mechanism causing
hyperglycemia?
• Insulin resistance
• Absolute insulin deficiency
• Increased glucagon secretion
• Reduced glycogenolysis
Rationale: Type 1 diabetes results from autoimmune destruction of pancreatic beta
cells, causing absolute insulin deficiency and impaired glucose uptake (ADA,
2025). Insulin resistance is characteristic of type 2 diabetes. Glucagon secretion
and glycogenolysis contribute but are secondary. Clinical correlation: Insulin
therapy is required to manage hyperglycemia.
, 2
3. Which compensatory mechanism is activated in early heart failure to
maintain cardiac output?
• Decreased sympathetic tone
• Increased sympathetic activation
• Reduced preload
• Decreased contractility
Rationale: In early heart failure, reduced cardiac output triggers sympathetic
activation, increasing heart rate and contractility via catecholamines to maintain
perfusion (AHA, 2025). This increases myocardial oxygen demand, risking
decompensation. Decreased sympathetic tone or contractility worsens failure.
Clinical correlation: Beta-blockers modulate this response long-term.
4. What is the primary pathophysiological cause of edema in nephrotic
syndrome?
• Increased hydrostatic pressure
• Hypoalbuminemia
• Sodium retention
• Lymphatic obstruction
Rationale: Nephrotic syndrome causes massive proteinuria, reducing serum
albumin and oncotic pressure, leading to fluid leakage into interstitial spaces
(NKF, 2025). Sodium retention is secondary; hydrostatic pressure and lymphatic
obstruction are less relevant. Clinical correlation: Diuretics and albumin infusion
manage edema.
5. In acute respiratory distress syndrome (ARDS), what cellular process
causes hypoxemia?
• Bronchial smooth muscle hypertrophy
• Diffuse alveolar injury
• Pulmonary artery occlusion
• Fibrotic remodeling
, 3
Rationale: ARDS involves diffuse alveolar injury from inflammation, disrupting
the alveolar-capillary membrane and causing edema, which impairs gas exchange
and leads to hypoxemia (ATS, 2025). Fibrosis occurs in chronic stages; bronchial
hypertrophy and artery occlusion are unrelated. Clinical correlation: Mechanical
ventilation supports oxygenation.
6. What is the primary mechanism of hypotension in septic shock?
• Increased cardiac output
• Systemic vasodilation
• Reduced vascular permeability
• Decreased cytokine release
Rationale: Septic shock triggers cytokine release (e.g., IL-1, TNF-α), stimulating
nitric oxide production, causing systemic vasodilation and hypotension (SCCM,
2025). Cardiac output may initially increase; permeability increases, not decreases.
Clinical correlation: Vasopressors (e.g., norepinephrine) restore vascular tone.
7. In chronic obstructive pulmonary disease (COPD), what is the primary
organ dysfunction?
• Cardiac hypertrophy
• Alveolar destruction
• Renal tubular necrosis
• Hepatic steatosis
Rationale: COPD, particularly emphysema, involves alveolar destruction from
protease-antiprotease imbalance, reducing gas exchange surface area (ATS, 2025).
Cardiac hypertrophy is a secondary complication. Clinical correlation: Oxygen
therapy and bronchodilators manage symptoms.
8. Which cellular process is primarily responsible for joint destruction in
rheumatoid arthritis?
• Osteoblast activation
, 4
• Synovial inflammation
• Chondrocyte hypertrophy
• Fibroblast atrophy
Rationale: Rheumatoid arthritis involves autoimmune synovial inflammation, with
cytokines (e.g., TNF-α, IL-6) causing pannus formation and cartilage destruction
(ACR, 2025). Osteoblast activation and chondrocyte hypertrophy are not primary.
Clinical correlation: DMARDs (e.g., methotrexate) reduce inflammation.
9. What is the primary compensatory mechanism in hypovolemic shock to
maintain blood pressure?
• Decreased heart rate
• Vasoconstriction
• Increased preload
• Reduced cardiac output
Rationale: Hypovolemic shock activates the renin-angiotensin-aldosterone system
(RAAS) and sympathetic system, causing vasoconstriction to maintain blood
pressure (AACN, 2025). Heart rate increases; preload is reduced. Clinical
correlation: Fluid resuscitation restores volume.
10. In cirrhosis, what cellular process contributes to portal hypertension?
• Hepatocyte hypertrophy
• Fibrosis
• Endothelial relaxation
• Kupffer cell apoptosis
Rationale: Cirrhosis causes hepatic fibrosis from stellate cell activation, increasing
intrahepatic resistance and portal pressure (AASLD, 2025). Hepatocyte
hypertrophy and endothelial relaxation are not primary. Clinical correlation: Beta -
blockers reduce variceal bleeding risk.
NURS 6501 – Advanced Pathophysiology
(Latest 2025/2026 Update) – Midterm
Exam Review with Verified Questions
and Answers
1. What is the primary cellular process responsible for tissue damage in acute
myocardial infarction?
• Apoptosis
• Necrosis
• Autophagy
• Hyperplasia
Rationale: Acute myocardial infarction (AMI) results from prolonged ischemia,
leading to ATP depletion and irreversible myocyte necrosis (AHA, 2025). Necrosis
causes cell membrane rupture and inflammation, unlike apoptosis (programmed
cell death) or autophagy (cellular recycling). Hyperplasia involves cell
proliferation, not damage. Clinical correlation: Elevated troponin confirms
necrosis; reperfusion therapy is critical.
2. In type 1 diabetes mellitus, what is the primary mechanism causing
hyperglycemia?
• Insulin resistance
• Absolute insulin deficiency
• Increased glucagon secretion
• Reduced glycogenolysis
Rationale: Type 1 diabetes results from autoimmune destruction of pancreatic beta
cells, causing absolute insulin deficiency and impaired glucose uptake (ADA,
2025). Insulin resistance is characteristic of type 2 diabetes. Glucagon secretion
and glycogenolysis contribute but are secondary. Clinical correlation: Insulin
therapy is required to manage hyperglycemia.
, 2
3. Which compensatory mechanism is activated in early heart failure to
maintain cardiac output?
• Decreased sympathetic tone
• Increased sympathetic activation
• Reduced preload
• Decreased contractility
Rationale: In early heart failure, reduced cardiac output triggers sympathetic
activation, increasing heart rate and contractility via catecholamines to maintain
perfusion (AHA, 2025). This increases myocardial oxygen demand, risking
decompensation. Decreased sympathetic tone or contractility worsens failure.
Clinical correlation: Beta-blockers modulate this response long-term.
4. What is the primary pathophysiological cause of edema in nephrotic
syndrome?
• Increased hydrostatic pressure
• Hypoalbuminemia
• Sodium retention
• Lymphatic obstruction
Rationale: Nephrotic syndrome causes massive proteinuria, reducing serum
albumin and oncotic pressure, leading to fluid leakage into interstitial spaces
(NKF, 2025). Sodium retention is secondary; hydrostatic pressure and lymphatic
obstruction are less relevant. Clinical correlation: Diuretics and albumin infusion
manage edema.
5. In acute respiratory distress syndrome (ARDS), what cellular process
causes hypoxemia?
• Bronchial smooth muscle hypertrophy
• Diffuse alveolar injury
• Pulmonary artery occlusion
• Fibrotic remodeling
, 3
Rationale: ARDS involves diffuse alveolar injury from inflammation, disrupting
the alveolar-capillary membrane and causing edema, which impairs gas exchange
and leads to hypoxemia (ATS, 2025). Fibrosis occurs in chronic stages; bronchial
hypertrophy and artery occlusion are unrelated. Clinical correlation: Mechanical
ventilation supports oxygenation.
6. What is the primary mechanism of hypotension in septic shock?
• Increased cardiac output
• Systemic vasodilation
• Reduced vascular permeability
• Decreased cytokine release
Rationale: Septic shock triggers cytokine release (e.g., IL-1, TNF-α), stimulating
nitric oxide production, causing systemic vasodilation and hypotension (SCCM,
2025). Cardiac output may initially increase; permeability increases, not decreases.
Clinical correlation: Vasopressors (e.g., norepinephrine) restore vascular tone.
7. In chronic obstructive pulmonary disease (COPD), what is the primary
organ dysfunction?
• Cardiac hypertrophy
• Alveolar destruction
• Renal tubular necrosis
• Hepatic steatosis
Rationale: COPD, particularly emphysema, involves alveolar destruction from
protease-antiprotease imbalance, reducing gas exchange surface area (ATS, 2025).
Cardiac hypertrophy is a secondary complication. Clinical correlation: Oxygen
therapy and bronchodilators manage symptoms.
8. Which cellular process is primarily responsible for joint destruction in
rheumatoid arthritis?
• Osteoblast activation
, 4
• Synovial inflammation
• Chondrocyte hypertrophy
• Fibroblast atrophy
Rationale: Rheumatoid arthritis involves autoimmune synovial inflammation, with
cytokines (e.g., TNF-α, IL-6) causing pannus formation and cartilage destruction
(ACR, 2025). Osteoblast activation and chondrocyte hypertrophy are not primary.
Clinical correlation: DMARDs (e.g., methotrexate) reduce inflammation.
9. What is the primary compensatory mechanism in hypovolemic shock to
maintain blood pressure?
• Decreased heart rate
• Vasoconstriction
• Increased preload
• Reduced cardiac output
Rationale: Hypovolemic shock activates the renin-angiotensin-aldosterone system
(RAAS) and sympathetic system, causing vasoconstriction to maintain blood
pressure (AACN, 2025). Heart rate increases; preload is reduced. Clinical
correlation: Fluid resuscitation restores volume.
10. In cirrhosis, what cellular process contributes to portal hypertension?
• Hepatocyte hypertrophy
• Fibrosis
• Endothelial relaxation
• Kupffer cell apoptosis
Rationale: Cirrhosis causes hepatic fibrosis from stellate cell activation, increasing
intrahepatic resistance and portal pressure (AASLD, 2025). Hepatocyte
hypertrophy and endothelial relaxation are not primary. Clinical correlation: Beta -
blockers reduce variceal bleeding risk.
