WGU D027 ADVANCED
PATHOPHARMACOLOGICAL
FOUNDATIONS COMPREHENSIVE
EXAM
1. Which cellular adaptation is characterized by an abnormal change in the size, shape, and
organization of mature cells, often considered a precursor to cancer?
A. Atrophy
B. Dysplasia
C. Metaplasia
D. Hyperplasia
Answer: B
Conceptual Explanation: Dysplasia refers to abnormal changes in cell size, shape, and
organization. It is not a true adaptive process but is often called atypical hyperplasia and is
frequently associated with neoplastic transformations.
2. In the context of cell death, how does apoptosis differ from necrosis?
A. Apoptosis involves cell swelling and bursting.
,B. Apoptosis causes the release of intracellular enzymes into the bloodstream.
C. Necrosis is always a physiological process.
D. Apoptosis is a programmed, organized process that does not trigger inflammation.
Answer: D
Conceptual Explanation: Apoptosis is ‘programmed cell death,’ an active process of self-
destruction that avoids eliciting an inflammatory response, whereas necrosis involves cell
membrane rupture and inflammation.
3. A patient presents with a serum potassium level of 6.8 mEq/L. Which EKG change is most
characteristic of this condition?
A. Prominent U waves
B. Prolonged QT interval
C. Peaked T waves
D. ST-segment depression
Answer: C
Conceptual Explanation: Hyperkalemia (high potassium) typically causes peaked T
waves, widening of the QRS complex, and eventual loss of the P wave due to altered
myocardial repolarization.
4. Which compensatory mechanism does the body use to counteract metabolic acidosis?
A. Hypoventilation to retain CO2
, B. Decreased renal excretion of hydrogen ions
C. Hyperventilation to blow off CO2
D. Increased renal reabsorption of chloride
Answer: C
Conceptual Explanation: In metabolic acidosis, the respiratory system compensates by
increasing the rate and depth of breathing (Kussmaul respirations) to decrease PaCO2
levels, thereby raising the pH.
5. Which epigenetic mechanism involves the attachment of a methyl group to a cytosine
base, typically leading to gene silencing?
A. Histone acetylation
B. DNA methylation
C. RNA interference
D. Chromatin remodeling
Answer: B
Conceptual Explanation: DNA methylation involves the addition of a methyl group to the
5-carbon of the cytosine ring, which often prevents transcription factors from binding, thus
silencing the gene.
PATHOPHARMACOLOGICAL
FOUNDATIONS COMPREHENSIVE
EXAM
1. Which cellular adaptation is characterized by an abnormal change in the size, shape, and
organization of mature cells, often considered a precursor to cancer?
A. Atrophy
B. Dysplasia
C. Metaplasia
D. Hyperplasia
Answer: B
Conceptual Explanation: Dysplasia refers to abnormal changes in cell size, shape, and
organization. It is not a true adaptive process but is often called atypical hyperplasia and is
frequently associated with neoplastic transformations.
2. In the context of cell death, how does apoptosis differ from necrosis?
A. Apoptosis involves cell swelling and bursting.
,B. Apoptosis causes the release of intracellular enzymes into the bloodstream.
C. Necrosis is always a physiological process.
D. Apoptosis is a programmed, organized process that does not trigger inflammation.
Answer: D
Conceptual Explanation: Apoptosis is ‘programmed cell death,’ an active process of self-
destruction that avoids eliciting an inflammatory response, whereas necrosis involves cell
membrane rupture and inflammation.
3. A patient presents with a serum potassium level of 6.8 mEq/L. Which EKG change is most
characteristic of this condition?
A. Prominent U waves
B. Prolonged QT interval
C. Peaked T waves
D. ST-segment depression
Answer: C
Conceptual Explanation: Hyperkalemia (high potassium) typically causes peaked T
waves, widening of the QRS complex, and eventual loss of the P wave due to altered
myocardial repolarization.
4. Which compensatory mechanism does the body use to counteract metabolic acidosis?
A. Hypoventilation to retain CO2
, B. Decreased renal excretion of hydrogen ions
C. Hyperventilation to blow off CO2
D. Increased renal reabsorption of chloride
Answer: C
Conceptual Explanation: In metabolic acidosis, the respiratory system compensates by
increasing the rate and depth of breathing (Kussmaul respirations) to decrease PaCO2
levels, thereby raising the pH.
5. Which epigenetic mechanism involves the attachment of a methyl group to a cytosine
base, typically leading to gene silencing?
A. Histone acetylation
B. DNA methylation
C. RNA interference
D. Chromatin remodeling
Answer: B
Conceptual Explanation: DNA methylation involves the addition of a methyl group to the
5-carbon of the cytosine ring, which often prevents transcription factors from binding, thus
silencing the gene.
