Pathophysiology Exam 3 Practice
Questions and Answers Latest
2026 Update(Complete test bank
100% correct)
Course
pathophysiology Exam 3 Practice Questions and Answers
1. A patient with chronic hypertension develops left ventricular hypertrophy. Which
pathophysiologic process best explains this change?
A. Hyperplasia
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Correct Answer: B. Hypertrophy
Rationale: Hypertrophy is an increase in cell size. Chronic hypertension increases ventricular
afterload, causing cardiac muscle cells to enlarge to generate greater force.
2. Which mechanism is primarily responsible for edema formation in congestive heart
failure?
A. Decreased hydrostatic pressure
B. Increased capillary hydrostatic pressure
C. Increased plasma albumin concentration
D. Decreased sodium retention
Correct Answer: B. Increased capillary hydrostatic pressure
Rationale: Heart failure increases venous pressure, which raises capillary hydrostatic pressure
and promotes movement of fluid into the interstitial space. Sodium and water retention can
further worsen edema.
3. A patient with left-sided heart failure develops pulmonary crackles and dyspnea. What
directly causes these respiratory manifestations?
A. Increased pulmonary capillary hydrostatic pressure
B. Decreased pulmonary blood flow
C. Increased red blood cell production
D. Decreased systemic venous pressure
,Correct Answer: A. Increased pulmonary capillary hydrostatic pressure
Rationale: Left ventricular dysfunction causes blood to back up into the pulmonary circulation.
Increased pulmonary capillary pressure promotes fluid movement into the interstitial and
alveolar spaces.
4. Which pathophysiologic change is characteristic of atherosclerosis?
A. Loss of all arterial smooth muscle
B. Lipid accumulation and inflammatory plaque formation within the arterial wall
C. Complete absence of endothelial cells
D. Increased arterial elasticity
Correct Answer: B. Lipid accumulation and inflammatory plaque formation within the
arterial wall
Rationale: Atherosclerosis involves endothelial dysfunction, lipid accumulation, inflammatory
responses, and plaque formation within arterial walls.
5. A patient experiences an acute myocardial infarction caused by prolonged coronary
artery occlusion. What is the primary cellular consequence?
A. Increased oxygen delivery
B. Myocardial ischemia followed by cellular injury and necrosis
C. Increased ATP production
D. Reversible skeletal muscle hypertrophy
Correct Answer: B. Myocardial ischemia followed by cellular injury and necrosis
Rationale: Coronary occlusion reduces oxygen delivery. Prolonged ischemia causes ATP
depletion, cellular dysfunction, membrane injury, and ultimately myocardial necrosis.
6. Which condition is characterized by airway inflammation, bronchial
hyperresponsiveness, and generally reversible bronchoconstriction?
A. Asthma
B. Emphysema
C. Pulmonary fibrosis
D. Pleural effusion
Correct Answer: A. Asthma
Rationale: Asthma involves chronic airway inflammation and hyperresponsiveness, producing
episodic bronchoconstriction and airflow limitation that is typically variable and reversible.
7. What is the fundamental pathophysiologic abnormality in emphysema?
,A. Destruction of alveolar walls
B. Increased alveolar surface area
C. Excessive pleural fluid production
D. Increased pulmonary capillary density
Correct Answer: A. Destruction of alveolar walls
Rationale: Emphysema involves destruction of alveolar walls and loss of elastic recoil, reducing
the surface area available for gas exchange.
8. A patient with COPD has chronic carbon dioxide retention. Which acid-base disturbance
is most likely?
A. Respiratory alkalosis
B. Respiratory acidosis
C. Metabolic alkalosis
D. Metabolic acidosis
Correct Answer: B. Respiratory acidosis
Rationale: Hypoventilation causes carbon dioxide retention. Increased PaCO₂ increases
carbonic acid and hydrogen ion concentration, producing respiratory acidosis.
9. A patient develops acute respiratory distress syndrome after severe sepsis. Which
pathophysiologic process is most characteristic?
A. Increased alveolar-capillary permeability
B. Decreased pulmonary inflammation
C. Increased surfactant production
D. Reduced pulmonary edema
Correct Answer: A. Increased alveolar-capillary permeability
Rationale: ARDS involves diffuse inflammatory lung injury and increased alveolar-capillary
permeability, causing protein-rich pulmonary edema and impaired gas exchange.
10. A pulmonary embolism most directly causes which abnormality?
A. Increased pulmonary perfusion
B. Ventilation-perfusion mismatch
C. Increased systemic oxygen delivery
D. Complete airway obstruction
Correct Answer: B. Ventilation-perfusion mismatch
Rationale: A pulmonary embolus obstructs pulmonary blood flow to ventilated alveoli, creating
areas of ventilation without adequate perfusion and impairing gas exchange.
, 11. Which type of acute kidney injury results from decreased renal blood flow?
A. Prerenal AKI
B. Intrarenal AKI
C. Postrenal AKI
D. Chronic renal failure
Correct Answer: A. Prerenal AKI
Rationale: Prerenal AKI results from inadequate renal perfusion, such as from severe
dehydration, hemorrhage, or reduced cardiac output.
12. Which condition is an example of postrenal acute kidney injury?
A. Severe dehydration
B. Acute glomerulonephritis
C. Ureteral obstruction from a kidney stone
D. Acute tubular necrosis
Correct Answer: C. Ureteral obstruction from a kidney stone
Rationale: Postrenal AKI results from obstruction of urine outflow. Stones, tumors, or prostate
enlargement can obstruct urinary flow.
13. Why do patients with chronic kidney disease commonly develop anemia?
A. Excessive erythropoietin production
B. Reduced renal erythropoietin production
C. Increased red blood cell lifespan
D. Increased iron absorption in the intestine
Correct Answer: B. Reduced renal erythropoietin production
Rationale: Diseased kidneys produce less erythropoietin, reducing stimulation of the bone
marrow to produce red blood cells.
14. A patient with severe renal failure develops hyperkalemia. Why is this dangerous?
A. Potassium directly lowers blood glucose
B. Hyperkalemia can disrupt cardiac electrical conduction
C. Potassium prevents all muscle contraction
D. Hyperkalemia causes immediate hypothermia
Correct Answer: B. Hyperkalemia can disrupt cardiac electrical conduction
Rationale: The kidneys normally excrete potassium. Significant potassium accumulation alters
myocardial membrane potentials and can cause dangerous dysrhythmias.
Questions and Answers Latest
2026 Update(Complete test bank
100% correct)
Course
pathophysiology Exam 3 Practice Questions and Answers
1. A patient with chronic hypertension develops left ventricular hypertrophy. Which
pathophysiologic process best explains this change?
A. Hyperplasia
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Correct Answer: B. Hypertrophy
Rationale: Hypertrophy is an increase in cell size. Chronic hypertension increases ventricular
afterload, causing cardiac muscle cells to enlarge to generate greater force.
2. Which mechanism is primarily responsible for edema formation in congestive heart
failure?
A. Decreased hydrostatic pressure
B. Increased capillary hydrostatic pressure
C. Increased plasma albumin concentration
D. Decreased sodium retention
Correct Answer: B. Increased capillary hydrostatic pressure
Rationale: Heart failure increases venous pressure, which raises capillary hydrostatic pressure
and promotes movement of fluid into the interstitial space. Sodium and water retention can
further worsen edema.
3. A patient with left-sided heart failure develops pulmonary crackles and dyspnea. What
directly causes these respiratory manifestations?
A. Increased pulmonary capillary hydrostatic pressure
B. Decreased pulmonary blood flow
C. Increased red blood cell production
D. Decreased systemic venous pressure
,Correct Answer: A. Increased pulmonary capillary hydrostatic pressure
Rationale: Left ventricular dysfunction causes blood to back up into the pulmonary circulation.
Increased pulmonary capillary pressure promotes fluid movement into the interstitial and
alveolar spaces.
4. Which pathophysiologic change is characteristic of atherosclerosis?
A. Loss of all arterial smooth muscle
B. Lipid accumulation and inflammatory plaque formation within the arterial wall
C. Complete absence of endothelial cells
D. Increased arterial elasticity
Correct Answer: B. Lipid accumulation and inflammatory plaque formation within the
arterial wall
Rationale: Atherosclerosis involves endothelial dysfunction, lipid accumulation, inflammatory
responses, and plaque formation within arterial walls.
5. A patient experiences an acute myocardial infarction caused by prolonged coronary
artery occlusion. What is the primary cellular consequence?
A. Increased oxygen delivery
B. Myocardial ischemia followed by cellular injury and necrosis
C. Increased ATP production
D. Reversible skeletal muscle hypertrophy
Correct Answer: B. Myocardial ischemia followed by cellular injury and necrosis
Rationale: Coronary occlusion reduces oxygen delivery. Prolonged ischemia causes ATP
depletion, cellular dysfunction, membrane injury, and ultimately myocardial necrosis.
6. Which condition is characterized by airway inflammation, bronchial
hyperresponsiveness, and generally reversible bronchoconstriction?
A. Asthma
B. Emphysema
C. Pulmonary fibrosis
D. Pleural effusion
Correct Answer: A. Asthma
Rationale: Asthma involves chronic airway inflammation and hyperresponsiveness, producing
episodic bronchoconstriction and airflow limitation that is typically variable and reversible.
7. What is the fundamental pathophysiologic abnormality in emphysema?
,A. Destruction of alveolar walls
B. Increased alveolar surface area
C. Excessive pleural fluid production
D. Increased pulmonary capillary density
Correct Answer: A. Destruction of alveolar walls
Rationale: Emphysema involves destruction of alveolar walls and loss of elastic recoil, reducing
the surface area available for gas exchange.
8. A patient with COPD has chronic carbon dioxide retention. Which acid-base disturbance
is most likely?
A. Respiratory alkalosis
B. Respiratory acidosis
C. Metabolic alkalosis
D. Metabolic acidosis
Correct Answer: B. Respiratory acidosis
Rationale: Hypoventilation causes carbon dioxide retention. Increased PaCO₂ increases
carbonic acid and hydrogen ion concentration, producing respiratory acidosis.
9. A patient develops acute respiratory distress syndrome after severe sepsis. Which
pathophysiologic process is most characteristic?
A. Increased alveolar-capillary permeability
B. Decreased pulmonary inflammation
C. Increased surfactant production
D. Reduced pulmonary edema
Correct Answer: A. Increased alveolar-capillary permeability
Rationale: ARDS involves diffuse inflammatory lung injury and increased alveolar-capillary
permeability, causing protein-rich pulmonary edema and impaired gas exchange.
10. A pulmonary embolism most directly causes which abnormality?
A. Increased pulmonary perfusion
B. Ventilation-perfusion mismatch
C. Increased systemic oxygen delivery
D. Complete airway obstruction
Correct Answer: B. Ventilation-perfusion mismatch
Rationale: A pulmonary embolus obstructs pulmonary blood flow to ventilated alveoli, creating
areas of ventilation without adequate perfusion and impairing gas exchange.
, 11. Which type of acute kidney injury results from decreased renal blood flow?
A. Prerenal AKI
B. Intrarenal AKI
C. Postrenal AKI
D. Chronic renal failure
Correct Answer: A. Prerenal AKI
Rationale: Prerenal AKI results from inadequate renal perfusion, such as from severe
dehydration, hemorrhage, or reduced cardiac output.
12. Which condition is an example of postrenal acute kidney injury?
A. Severe dehydration
B. Acute glomerulonephritis
C. Ureteral obstruction from a kidney stone
D. Acute tubular necrosis
Correct Answer: C. Ureteral obstruction from a kidney stone
Rationale: Postrenal AKI results from obstruction of urine outflow. Stones, tumors, or prostate
enlargement can obstruct urinary flow.
13. Why do patients with chronic kidney disease commonly develop anemia?
A. Excessive erythropoietin production
B. Reduced renal erythropoietin production
C. Increased red blood cell lifespan
D. Increased iron absorption in the intestine
Correct Answer: B. Reduced renal erythropoietin production
Rationale: Diseased kidneys produce less erythropoietin, reducing stimulation of the bone
marrow to produce red blood cells.
14. A patient with severe renal failure develops hyperkalemia. Why is this dangerous?
A. Potassium directly lowers blood glucose
B. Hyperkalemia can disrupt cardiac electrical conduction
C. Potassium prevents all muscle contraction
D. Hyperkalemia causes immediate hypothermia
Correct Answer: B. Hyperkalemia can disrupt cardiac electrical conduction
Rationale: The kidneys normally excrete potassium. Significant potassium accumulation alters
myocardial membrane potentials and can cause dangerous dysrhythmias.
