WGU D236 PATHOPHYSIOLOGY
COMPREHENSIVE FINAL EXAM STUDY
GUIDE QUESTIONS AND CORRECT
ANSWERS WITH DETAILED
EXPLANATIONS
1. Which cellular adaptation is characterized by the replacement of one mature cell type by
another, often in response to chronic irritation?
A. Atrophy
B. Metaplasia
C. Hypertrophy
D. Dysplasia
Answer: B
Conceptual Explanation: Metaplasia is the reversible replacement of one mature cell type
by another less mature cell type, such as the change in bronchial lining due to smoking.
2. A patient presents with severe edema and low serum albumin levels. Which pressure
imbalance is the primary cause of this fluid shift?
A. Decreased capillary oncotic pressure
B. Increased capillary hydrostatic pressure
,C. Increased interstitial hydrostatic pressure
D. Decreased interstitial oncotic pressure
Answer: A
Conceptual Explanation: Albumin is the primary protein responsible for maintaining
capillary oncotic pressure. When levels are low, fluid leaks into the interstitial space.
3. In Type II hypersensitivity reactions, what is the primary mechanism of cell destruction?
A. IgE-mediated mast cell degranulation
B. Immune complex deposition in tissues
C. T-cell mediated cytotoxicity
D. Antibodies binding to specific cell-surface antigens
Answer: D
Conceptual Explanation: Type II hypersensitivity involves IgG or IgM antibodies binding
to antigens on the cell surface, leading to complement activation or phagocytosis.
4. Which clinical manifestation is a hallmark sign of the compensatory stage of shock?
A. Decreased heart rate
B. Increased heart rate and vasoconstriction
C. Increased urine output
D. Respiratory alkalosis with slow breathing
, Answer: B
Conceptual Explanation: In the compensatory stage of shock, the SNS triggers tachycardia
and vasoconstriction to maintain cardiac output and blood pressure.
5. A patient with Chronic Obstructive Pulmonary Disease (COPD) is likely to develop which
acid-base imbalance?
A. Metabolic Acidosis
B. Respiratory Acidosis
C. Metabolic Alkalosis
D. Respiratory Alkalosis
Answer: B
Conceptual Explanation: COPD causes CO2 retention due to hypoventilation, leading to an
increase in carbonic acid and a drop in pH, resulting in respiratory acidosis.
6. What is the primary pathophysiological mechanism behind Myasthenia Gravis?
A. Destruction of the myelin sheath in the CNS
B. Depletion of dopamine in the basal ganglia
C. Autoimmune destruction of acetylcholine receptors at the neuromuscular junction
D. Excessive production of acetylcholinesterase
Answer: C
COMPREHENSIVE FINAL EXAM STUDY
GUIDE QUESTIONS AND CORRECT
ANSWERS WITH DETAILED
EXPLANATIONS
1. Which cellular adaptation is characterized by the replacement of one mature cell type by
another, often in response to chronic irritation?
A. Atrophy
B. Metaplasia
C. Hypertrophy
D. Dysplasia
Answer: B
Conceptual Explanation: Metaplasia is the reversible replacement of one mature cell type
by another less mature cell type, such as the change in bronchial lining due to smoking.
2. A patient presents with severe edema and low serum albumin levels. Which pressure
imbalance is the primary cause of this fluid shift?
A. Decreased capillary oncotic pressure
B. Increased capillary hydrostatic pressure
,C. Increased interstitial hydrostatic pressure
D. Decreased interstitial oncotic pressure
Answer: A
Conceptual Explanation: Albumin is the primary protein responsible for maintaining
capillary oncotic pressure. When levels are low, fluid leaks into the interstitial space.
3. In Type II hypersensitivity reactions, what is the primary mechanism of cell destruction?
A. IgE-mediated mast cell degranulation
B. Immune complex deposition in tissues
C. T-cell mediated cytotoxicity
D. Antibodies binding to specific cell-surface antigens
Answer: D
Conceptual Explanation: Type II hypersensitivity involves IgG or IgM antibodies binding
to antigens on the cell surface, leading to complement activation or phagocytosis.
4. Which clinical manifestation is a hallmark sign of the compensatory stage of shock?
A. Decreased heart rate
B. Increased heart rate and vasoconstriction
C. Increased urine output
D. Respiratory alkalosis with slow breathing
, Answer: B
Conceptual Explanation: In the compensatory stage of shock, the SNS triggers tachycardia
and vasoconstriction to maintain cardiac output and blood pressure.
5. A patient with Chronic Obstructive Pulmonary Disease (COPD) is likely to develop which
acid-base imbalance?
A. Metabolic Acidosis
B. Respiratory Acidosis
C. Metabolic Alkalosis
D. Respiratory Alkalosis
Answer: B
Conceptual Explanation: COPD causes CO2 retention due to hypoventilation, leading to an
increase in carbonic acid and a drop in pH, resulting in respiratory acidosis.
6. What is the primary pathophysiological mechanism behind Myasthenia Gravis?
A. Destruction of the myelin sheath in the CNS
B. Depletion of dopamine in the basal ganglia
C. Autoimmune destruction of acetylcholine receptors at the neuromuscular junction
D. Excessive production of acetylcholinesterase
Answer: C
