NUR 2063 Exam 2: Essentials of Pathophysiology -
Rasmussen University Updated and Latest Questions and
Correct Answers with Rationale
1. Which type of hypersensitivity reaction is characterized by an IgE-mediated response to an allergen?
A. Type III
B. Type II
C. Type I
D. Type IV
Correct Answer: C
Rationale: Type I hypersensitivity is an immediate allergic reaction mediated by IgE antibodies binding
to mast cells. Upon re-exposure to an antigen, mast cells degranulate and release histamine and other
inflammatory mediators. This process causes clinical symptoms such as pruritus, urticaria, and
potentially fatal anaphylaxis. It differs from other types because it is triggered specifically by
environmental allergens in sensitized individuals. Rapid recognition and management are essential to
prevent severe systemic complications.
2. A patient presents with dyspnea, crackles in the lungs, and an ejection fraction of 35%. Which condition is
most likely?
A. Left-sided heart failure
B. Right-sided heart failure
C. Pulmonary embolism
D. Tension pneumothorax
Correct Answer: A
,Rationale: Left-sided heart failure occurs when the left ventricle fails to pump blood efficiently to the
systemic circulation. This failure causes blood to back up into the pulmonary veins and capillaries,
leading to pulmonary edema. Common clinical manifestations include shortness of breath, orthopnea,
and audible crackles during lung auscultation. A reduced ejection fraction typically indicates systolic
dysfunction within the left side of the heart. Understanding these signs helps clinicians differentiate
between left and right heart failure syndromes.
3. What is the primary underlying pathophysiology associated with emphysema?
A. Hypertrophy of mucus-secreting glands
B. Destruction of alveolar walls and loss of elastic recoil
C. Reversible bronchospasm and airway inflammation
D. Fluid accumulation in the pleural space
Correct Answer: B
Rationale: Emphysema is a form of chronic obstructive pulmonary disease characterized by the
permanent enlargement of air spaces. This condition involves the destruction of alveolar walls, which
significantly reduces the surface area available for gas exchange. The loss of elastic recoil causes air
trapping, leading to a characteristic barrel chest appearance in patients. Unlike chronic bronchitis,
emphysema primarily affects the parenchyma rather than the airways themselves. Clinicians often
observe prolonged expiration and pursed-lip breathing in these individuals.
4. Which laboratory marker is the most specific for diagnosing an acute myocardial infarction?
A. Creatine Kinase (CK-MB)
B. C-reactive protein (CRP)
C. Brain Natriuretic Peptide (BNP)
, D. Troponin I and T
Correct Answer: D
Rationale: Troponins are regulatory proteins found in cardiac muscle that are released into the
bloodstream following myocardial injury. They are considered the gold standard for diagnosing
myocardial infarction due to their high sensitivity and specificity. Serum levels typically begin to rise
within a few hours of the initial cardiac insult. While CK-MB was used in the past, troponin remains
elevated for a longer period, aiding in late diagnosis. Accurate interpretation of these levels is critical for
initiating timely reperfusion therapy.
5. Which hypersensitivity reaction involves the destruction of cells by antibodies, such as in a mismatched
blood transfusion?
A. Type I
B. Type II
C. Type III
D. Type IV
Correct Answer: B
Rationale: Type II hypersensitivity is an antibody-mediated reaction where IgG or IgM antibodies target
specific antigens on cell surfaces. This binding triggers the complement system or phagocytosis, leading
to the lysis of the targeted cells. A classic example is a hemolytic transfusion reaction resulting from
blood type incompatibility. It is distinct from Type III because the antigens are fixed on cells rather than
being soluble. Monitoring for acute hemolytic signs is a vital nursing responsibility during blood
administration.
Rasmussen University Updated and Latest Questions and
Correct Answers with Rationale
1. Which type of hypersensitivity reaction is characterized by an IgE-mediated response to an allergen?
A. Type III
B. Type II
C. Type I
D. Type IV
Correct Answer: C
Rationale: Type I hypersensitivity is an immediate allergic reaction mediated by IgE antibodies binding
to mast cells. Upon re-exposure to an antigen, mast cells degranulate and release histamine and other
inflammatory mediators. This process causes clinical symptoms such as pruritus, urticaria, and
potentially fatal anaphylaxis. It differs from other types because it is triggered specifically by
environmental allergens in sensitized individuals. Rapid recognition and management are essential to
prevent severe systemic complications.
2. A patient presents with dyspnea, crackles in the lungs, and an ejection fraction of 35%. Which condition is
most likely?
A. Left-sided heart failure
B. Right-sided heart failure
C. Pulmonary embolism
D. Tension pneumothorax
Correct Answer: A
,Rationale: Left-sided heart failure occurs when the left ventricle fails to pump blood efficiently to the
systemic circulation. This failure causes blood to back up into the pulmonary veins and capillaries,
leading to pulmonary edema. Common clinical manifestations include shortness of breath, orthopnea,
and audible crackles during lung auscultation. A reduced ejection fraction typically indicates systolic
dysfunction within the left side of the heart. Understanding these signs helps clinicians differentiate
between left and right heart failure syndromes.
3. What is the primary underlying pathophysiology associated with emphysema?
A. Hypertrophy of mucus-secreting glands
B. Destruction of alveolar walls and loss of elastic recoil
C. Reversible bronchospasm and airway inflammation
D. Fluid accumulation in the pleural space
Correct Answer: B
Rationale: Emphysema is a form of chronic obstructive pulmonary disease characterized by the
permanent enlargement of air spaces. This condition involves the destruction of alveolar walls, which
significantly reduces the surface area available for gas exchange. The loss of elastic recoil causes air
trapping, leading to a characteristic barrel chest appearance in patients. Unlike chronic bronchitis,
emphysema primarily affects the parenchyma rather than the airways themselves. Clinicians often
observe prolonged expiration and pursed-lip breathing in these individuals.
4. Which laboratory marker is the most specific for diagnosing an acute myocardial infarction?
A. Creatine Kinase (CK-MB)
B. C-reactive protein (CRP)
C. Brain Natriuretic Peptide (BNP)
, D. Troponin I and T
Correct Answer: D
Rationale: Troponins are regulatory proteins found in cardiac muscle that are released into the
bloodstream following myocardial injury. They are considered the gold standard for diagnosing
myocardial infarction due to their high sensitivity and specificity. Serum levels typically begin to rise
within a few hours of the initial cardiac insult. While CK-MB was used in the past, troponin remains
elevated for a longer period, aiding in late diagnosis. Accurate interpretation of these levels is critical for
initiating timely reperfusion therapy.
5. Which hypersensitivity reaction involves the destruction of cells by antibodies, such as in a mismatched
blood transfusion?
A. Type I
B. Type II
C. Type III
D. Type IV
Correct Answer: B
Rationale: Type II hypersensitivity is an antibody-mediated reaction where IgG or IgM antibodies target
specific antigens on cell surfaces. This binding triggers the complement system or phagocytosis, leading
to the lysis of the targeted cells. A classic example is a hemolytic transfusion reaction resulting from
blood type incompatibility. It is distinct from Type III because the antigens are fixed on cells rather than
being soluble. Monitoring for acute hemolytic signs is a vital nursing responsibility during blood
administration.
