NR 507 ADVANCED
PATHOPHYSIOLOGY
COMPREHENSIVE EXAM QUESTIONS
WITH VERIFIED ANSWERS 2026/2027.
CHAMBERLAIN
1. During cellular ischemia, what is the primary mechanism leading to hydropic swelling?
A. Increased extracellular sodium concentration
B. Activation of the ubiquitin-proteasome pathway
C. Excessive leakage of potassium into the intracellular space
D. Failure of the Na+/K+ ATPase pump due to ATP depletion
Answer: D
Conceptual Explanation: Ischemia leads to ATP depletion, which causes the failure of the
Na+/K+ ATPase pump. Sodium then accumulates inside the cell, drawing water in by
osmosis, resulting in cellular swelling.
2. Which process describes the programmed cell death that prevents an inflammatory
response?
A. Apoptosis
B. Autophagy
,C. Coagulative necrosis
D. Liquefactive necrosis
Answer: A
Conceptual Explanation: Apoptosis is a regulated, programmed process of cellular self-
destruction that does not typically elicit an inflammatory response, unlike necrosis.
3. A patient is diagnosed with an autosomal dominant disorder. What is the probability that
their offspring will inherit the disease if the other parent is unaffected?
A. 50%
B. 25%
C. 75%
D. 100%
Answer: A
Conceptual Explanation: In autosomal dominant inheritance, an affected heterozygous
parent (Aa) and an unaffected parent (aa) have a 50% chance of passing the dominant
allele (A) to their children.
4. Which epigenetic mechanism involves the addition of a methyl group to cytosine, typically
leading to gene silencing?
A. DNA methylation
B. Histone acetylation
, C. RNA interference
D. Translation inhibition
Answer: A
Conceptual Explanation: DNA methylation involves the addition of a methyl group to a
cytosine base, which generally inhibits the binding of transcription factors, thereby
silencing the gene.
5. What is the primary driver of water movement between the intracellular and extracellular
fluid compartments?
A. Hydrostatic pressure
B. Active transport
C. Osmotic pressure
D. Oncotic pressure
Answer: C
Conceptual Explanation: Osmotic pressure, primarily determined by sodium in the ECF
and potassium in the ICF, drives the movement of water across semi-permeable cell
membranes.
6. A patient with severe hyperkalemia is most at risk for which physiological complication?
A. Increased neuromuscular excitability
B. Hyporeflexia and muscle weakness
PATHOPHYSIOLOGY
COMPREHENSIVE EXAM QUESTIONS
WITH VERIFIED ANSWERS 2026/2027.
CHAMBERLAIN
1. During cellular ischemia, what is the primary mechanism leading to hydropic swelling?
A. Increased extracellular sodium concentration
B. Activation of the ubiquitin-proteasome pathway
C. Excessive leakage of potassium into the intracellular space
D. Failure of the Na+/K+ ATPase pump due to ATP depletion
Answer: D
Conceptual Explanation: Ischemia leads to ATP depletion, which causes the failure of the
Na+/K+ ATPase pump. Sodium then accumulates inside the cell, drawing water in by
osmosis, resulting in cellular swelling.
2. Which process describes the programmed cell death that prevents an inflammatory
response?
A. Apoptosis
B. Autophagy
,C. Coagulative necrosis
D. Liquefactive necrosis
Answer: A
Conceptual Explanation: Apoptosis is a regulated, programmed process of cellular self-
destruction that does not typically elicit an inflammatory response, unlike necrosis.
3. A patient is diagnosed with an autosomal dominant disorder. What is the probability that
their offspring will inherit the disease if the other parent is unaffected?
A. 50%
B. 25%
C. 75%
D. 100%
Answer: A
Conceptual Explanation: In autosomal dominant inheritance, an affected heterozygous
parent (Aa) and an unaffected parent (aa) have a 50% chance of passing the dominant
allele (A) to their children.
4. Which epigenetic mechanism involves the addition of a methyl group to cytosine, typically
leading to gene silencing?
A. DNA methylation
B. Histone acetylation
, C. RNA interference
D. Translation inhibition
Answer: A
Conceptual Explanation: DNA methylation involves the addition of a methyl group to a
cytosine base, which generally inhibits the binding of transcription factors, thereby
silencing the gene.
5. What is the primary driver of water movement between the intracellular and extracellular
fluid compartments?
A. Hydrostatic pressure
B. Active transport
C. Osmotic pressure
D. Oncotic pressure
Answer: C
Conceptual Explanation: Osmotic pressure, primarily determined by sodium in the ECF
and potassium in the ICF, drives the movement of water across semi-permeable cell
membranes.
6. A patient with severe hyperkalemia is most at risk for which physiological complication?
A. Increased neuromuscular excitability
B. Hyporeflexia and muscle weakness
