Question 1: A nurse is reviewing the pathophysiology of inflammation. Which event
occurs first in the inflammatory response?
A. Vasodilation and increased capillary permeability
B. Migration of leukocytes to the site of injury
C. Release of chemical mediators such as histamine
D. Phagocytosis of pathogens by macrophages
CORRECT ANSWER: C. Release of chemical mediators such as histamine
Rationale: The inflammatory response begins with tissue injury, which triggers the
release of chemical mediators such as histamine, bradykinin, and prostaglandins from
damaged cells and mast cells. These mediators cause vasodilation and increased
capillary permeability, leading to the classic signs of inflammation: redness, heat,
swelling, pain, and loss of function.
Question 2: Which pathophysiologic process is responsible for the formation of
edema during inflammation?
A. Increased capillary permeability and fluid shift into interstitial spaces
B. Decreased blood flow to the a ected area
C. Increased lymphatic drainage
D. Decreased osmotic pressure in the interstitial space
CORRECT ANSWER: A. Increased capillary permeability and fluid shift into
interstitial spaces
Rationale: During inflammation, chemical mediators cause increased capillary
permeability, allowing plasma proteins and fluid to leak into the interstitial spaces,
resulting in edema. This is a protective mechanism that dilutes toxins and brings
immune cells to the site of injury.
Question 3: A nurse is caring for a client with an infection. Which type of immunity
is present at birth and provides immediate, nonspecific protection?
A. Adaptive immunity
B. Humoral immunity
C. Innate immunity
D. Cell-mediated immunity
CORRECT ANSWER: C. Innate immunity
Rationale: Innate immunity is present at birth and provides immediate, nonspecific
protection against pathogens through barriers (skin, mucous membranes), phagocytic
cells, and inflammatory responses. Adaptive immunity is acquired and specific,
involving humoral (B-cell) and cell-mediated (T-cell) responses.
,Question 4: Which type of immunity is acquired through vaccination?
A. Natural active immunity
B. Artificial active immunity
C. Natural passive immunity
D. Artificial passive immunity
CORRECT ANSWER: B. Artificial active immunity
Rationale: Artificial active immunity is acquired through vaccination, which introduces
antigens that stimulate the immune system to produce antibodies and memory cells.
Natural active immunity occurs through infection, and passive immunity involves
transfer of antibodies (e.g., from mother to fetus or through immunoglobulin therapy).
Question 5: A nurse is reviewing the pathophysiology of anaphylaxis. Which
immunoglobulin is primarily responsible for this severe allergic reaction?
A. IgA
B. IgM
C. IgG
D. IgE
CORRECT ANSWER: D. IgE
Rationale: IgE is the immunoglobulin responsible for type I hypersensitivity reactions,
including anaphylaxis. IgE binds to mast cells and basophils, triggering the release of
histamine and other mediators that cause vasodilation, bronchoconstriction, and
increased capillary permeability.
Question 6: Which pathophysiologic change occurs in the airways during an
asthma exacerbation?
A. Bronchodilation and decreased mucus production
B. Bronchoconstriction, inflammation, and increased mucus production
C. Decreased airway responsiveness
D. Alveolar collapse
CORRECT ANSWER: B. Bronchoconstriction, inflammation, and increased mucus
production
Rationale: Asthma is characterized by chronic airway inflammation,
bronchoconstriction (smooth muscle spasm), and increased mucus production,
leading to airflow obstruction, wheezing, and dyspnea. These changes are triggered by
allergens, irritants, or infections.
Question 7: A nurse is reviewing the pathophysiology of chronic obstructive
pulmonary disease. Which change is characteristic of emphysema?
,A. Destruction of alveolar walls and loss of elastic recoil
B. Increased mucus production and chronic cough
C. Bronchial wall thickening
D. Decreased residual volume
CORRECT ANSWER: A. Destruction of alveolar walls and loss of elastic recoil
Rationale: Emphysema involves destruction of alveolar walls and loss of elastic recoil,
leading to air trapping, hyperinflation (barrel chest), and decreased gas exchange.
Chronic bronchitis, the other main type of COPD, is characterized by increased mucus
production and chronic cough.
Question 8: Which pathophysiologic process occurs in the lungs of a client with
pneumonia?
A. Alveolar consolidation with exudate
B. Bronchoconstriction and air trapping
C. Destruction of alveolar walls
D. Decreased pulmonary blood flow
CORRECT ANSWER: A. Alveolar consolidation with exudate
Rationale: Pneumonia causes inflammation and consolidation of the alveoli with
exudate (fluid, cells, and debris), impairing gas exchange and causing crackles,
dullness on percussion, and hypoxemia. Bronchoconstriction and air trapping occur in
asthma, and alveolar destruction occurs in emphysema.
Question 9: A nurse is reviewing the pathophysiology of heart failure. Which
mechanism leads to pulmonary edema in left-sided heart failure?
A. Increased left ventricular pressure and pulmonary congestion
B. Increased right ventricular pressure and systemic congestion
C. Decreased pulmonary vascular resistance
D. Increased lymphatic drainage
CORRECT ANSWER: A. Increased left ventricular pressure and pulmonary
congestion
Rationale: Left-sided heart failure causes increased left ventricular end-diastolic
pressure, which backs up into the pulmonary circulation, leading to pulmonary
congestion and edema. Right-sided heart failure causes systemic venous congestion,
leading to peripheral edema and jugular venous distention.
Question 10: Which pathophysiologic change occurs in the arteries during
atherosclerosis?
, A. Plaque accumulation in the intima of arteries
B. Dilation of the arterial wall
C. Decreased lipid deposition
D. Thinning of the arterial wall
CORRECT ANSWER: A. Plaque accumulation in the intima of arteries
Rationale: Atherosclerosis involves the accumulation of lipid-rich plaques in the intima
of arteries, leading to narrowing, decreased blood flow, and increased risk of
thrombosis. It is a major cause of coronary artery disease, stroke, and peripheral
arterial disease.
Question 11: A nurse is reviewing the pathophysiology of hypertension. Which
factor contributes to primary hypertension?
A. Increased peripheral vascular resistance and cardiac output
B. Decreased renin-angiotensin-aldosterone system activity
C. Decreased sympathetic nervous system activity
D. Decreased blood volume
CORRECT ANSWER: A. Increased peripheral vascular resistance and cardiac
output
Rationale: Primary hypertension is caused by multifactorial mechanisms, including
increased peripheral vascular resistance, increased cardiac output, and overactivity of
the renin-angiotensin-aldosterone system and sympathetic nervous system. Secondary
hypertension has an identifiable cause.
Question 12: Which pathophysiologic process occurs in the heart during
myocardial infarction?
A. Ischemia and necrosis of myocardial tissue due to decreased blood flow
B. Increased blood flow to the myocardium
C. Decreased myocardial oxygen demand
D. Increased coronary artery dilation
CORRECT ANSWER: A. Ischemia and necrosis of myocardial tissue due to
decreased blood flow
Rationale: Myocardial infarction occurs when coronary blood flow is obstructed,
leading to ischemia and necrosis of myocardial tissue. This causes chest pain, elevated
troponin, and potential complications such as dysrhythmias, heart failure, and
cardiogenic shock.
Question 13: A nurse is reviewing the pathophysiology of anemia. Which finding is
characteristic of iron deficiency anemia?
occurs first in the inflammatory response?
A. Vasodilation and increased capillary permeability
B. Migration of leukocytes to the site of injury
C. Release of chemical mediators such as histamine
D. Phagocytosis of pathogens by macrophages
CORRECT ANSWER: C. Release of chemical mediators such as histamine
Rationale: The inflammatory response begins with tissue injury, which triggers the
release of chemical mediators such as histamine, bradykinin, and prostaglandins from
damaged cells and mast cells. These mediators cause vasodilation and increased
capillary permeability, leading to the classic signs of inflammation: redness, heat,
swelling, pain, and loss of function.
Question 2: Which pathophysiologic process is responsible for the formation of
edema during inflammation?
A. Increased capillary permeability and fluid shift into interstitial spaces
B. Decreased blood flow to the a ected area
C. Increased lymphatic drainage
D. Decreased osmotic pressure in the interstitial space
CORRECT ANSWER: A. Increased capillary permeability and fluid shift into
interstitial spaces
Rationale: During inflammation, chemical mediators cause increased capillary
permeability, allowing plasma proteins and fluid to leak into the interstitial spaces,
resulting in edema. This is a protective mechanism that dilutes toxins and brings
immune cells to the site of injury.
Question 3: A nurse is caring for a client with an infection. Which type of immunity
is present at birth and provides immediate, nonspecific protection?
A. Adaptive immunity
B. Humoral immunity
C. Innate immunity
D. Cell-mediated immunity
CORRECT ANSWER: C. Innate immunity
Rationale: Innate immunity is present at birth and provides immediate, nonspecific
protection against pathogens through barriers (skin, mucous membranes), phagocytic
cells, and inflammatory responses. Adaptive immunity is acquired and specific,
involving humoral (B-cell) and cell-mediated (T-cell) responses.
,Question 4: Which type of immunity is acquired through vaccination?
A. Natural active immunity
B. Artificial active immunity
C. Natural passive immunity
D. Artificial passive immunity
CORRECT ANSWER: B. Artificial active immunity
Rationale: Artificial active immunity is acquired through vaccination, which introduces
antigens that stimulate the immune system to produce antibodies and memory cells.
Natural active immunity occurs through infection, and passive immunity involves
transfer of antibodies (e.g., from mother to fetus or through immunoglobulin therapy).
Question 5: A nurse is reviewing the pathophysiology of anaphylaxis. Which
immunoglobulin is primarily responsible for this severe allergic reaction?
A. IgA
B. IgM
C. IgG
D. IgE
CORRECT ANSWER: D. IgE
Rationale: IgE is the immunoglobulin responsible for type I hypersensitivity reactions,
including anaphylaxis. IgE binds to mast cells and basophils, triggering the release of
histamine and other mediators that cause vasodilation, bronchoconstriction, and
increased capillary permeability.
Question 6: Which pathophysiologic change occurs in the airways during an
asthma exacerbation?
A. Bronchodilation and decreased mucus production
B. Bronchoconstriction, inflammation, and increased mucus production
C. Decreased airway responsiveness
D. Alveolar collapse
CORRECT ANSWER: B. Bronchoconstriction, inflammation, and increased mucus
production
Rationale: Asthma is characterized by chronic airway inflammation,
bronchoconstriction (smooth muscle spasm), and increased mucus production,
leading to airflow obstruction, wheezing, and dyspnea. These changes are triggered by
allergens, irritants, or infections.
Question 7: A nurse is reviewing the pathophysiology of chronic obstructive
pulmonary disease. Which change is characteristic of emphysema?
,A. Destruction of alveolar walls and loss of elastic recoil
B. Increased mucus production and chronic cough
C. Bronchial wall thickening
D. Decreased residual volume
CORRECT ANSWER: A. Destruction of alveolar walls and loss of elastic recoil
Rationale: Emphysema involves destruction of alveolar walls and loss of elastic recoil,
leading to air trapping, hyperinflation (barrel chest), and decreased gas exchange.
Chronic bronchitis, the other main type of COPD, is characterized by increased mucus
production and chronic cough.
Question 8: Which pathophysiologic process occurs in the lungs of a client with
pneumonia?
A. Alveolar consolidation with exudate
B. Bronchoconstriction and air trapping
C. Destruction of alveolar walls
D. Decreased pulmonary blood flow
CORRECT ANSWER: A. Alveolar consolidation with exudate
Rationale: Pneumonia causes inflammation and consolidation of the alveoli with
exudate (fluid, cells, and debris), impairing gas exchange and causing crackles,
dullness on percussion, and hypoxemia. Bronchoconstriction and air trapping occur in
asthma, and alveolar destruction occurs in emphysema.
Question 9: A nurse is reviewing the pathophysiology of heart failure. Which
mechanism leads to pulmonary edema in left-sided heart failure?
A. Increased left ventricular pressure and pulmonary congestion
B. Increased right ventricular pressure and systemic congestion
C. Decreased pulmonary vascular resistance
D. Increased lymphatic drainage
CORRECT ANSWER: A. Increased left ventricular pressure and pulmonary
congestion
Rationale: Left-sided heart failure causes increased left ventricular end-diastolic
pressure, which backs up into the pulmonary circulation, leading to pulmonary
congestion and edema. Right-sided heart failure causes systemic venous congestion,
leading to peripheral edema and jugular venous distention.
Question 10: Which pathophysiologic change occurs in the arteries during
atherosclerosis?
, A. Plaque accumulation in the intima of arteries
B. Dilation of the arterial wall
C. Decreased lipid deposition
D. Thinning of the arterial wall
CORRECT ANSWER: A. Plaque accumulation in the intima of arteries
Rationale: Atherosclerosis involves the accumulation of lipid-rich plaques in the intima
of arteries, leading to narrowing, decreased blood flow, and increased risk of
thrombosis. It is a major cause of coronary artery disease, stroke, and peripheral
arterial disease.
Question 11: A nurse is reviewing the pathophysiology of hypertension. Which
factor contributes to primary hypertension?
A. Increased peripheral vascular resistance and cardiac output
B. Decreased renin-angiotensin-aldosterone system activity
C. Decreased sympathetic nervous system activity
D. Decreased blood volume
CORRECT ANSWER: A. Increased peripheral vascular resistance and cardiac
output
Rationale: Primary hypertension is caused by multifactorial mechanisms, including
increased peripheral vascular resistance, increased cardiac output, and overactivity of
the renin-angiotensin-aldosterone system and sympathetic nervous system. Secondary
hypertension has an identifiable cause.
Question 12: Which pathophysiologic process occurs in the heart during
myocardial infarction?
A. Ischemia and necrosis of myocardial tissue due to decreased blood flow
B. Increased blood flow to the myocardium
C. Decreased myocardial oxygen demand
D. Increased coronary artery dilation
CORRECT ANSWER: A. Ischemia and necrosis of myocardial tissue due to
decreased blood flow
Rationale: Myocardial infarction occurs when coronary blood flow is obstructed,
leading to ischemia and necrosis of myocardial tissue. This causes chest pain, elevated
troponin, and potential complications such as dysrhythmias, heart failure, and
cardiogenic shock.
Question 13: A nurse is reviewing the pathophysiology of anemia. Which finding is
characteristic of iron deficiency anemia?
