NUR631 ADVANCED
PATHOPHYSIOLOGY
COMPREHENSIVE STUDY EXAM
QUESTIONS AND ANSWERS 100%
VERIFIED BY EXPERTS. 2026/2027
1. A patient is experiencing muscular atrophy following the removal of a limb cast. Which
cellular mechanism is primarily responsible for this change?
A. Increased protein synthesis and organelle duplication
B. Cellular swelling due to sodium-potassium pump failure
C. Decreased protein synthesis and increased protein catabolism
D. Replacement of one mature cell type by another
Answer: C
Conceptual Explanation: Atrophy is a decrease in cellular size caused by aging, disuse, or
reduced blood supply. It involves decreased protein synthesis and/or increased protein
degradation via the ubiquitin-proteasome pathway.
2. Which process describes the programmed cell death that prevents an inflammatory
response by neatly packaging cellular contents into membrane-bound vesicles?
A. Liquefactive necrosis
,B. Coagulative necrosis
C. Autolysis
D. Apoptosis
Answer: D
Conceptual Explanation: Apoptosis is distinct from necrosis as it is a regulated,
programmed process that does not cause inflammation. Cells shrink and fragment into
apoptotic bodies that are phagocytized.
3. A 55-year-old male with chronic hypertension shows an increase in the size of the left
ventricular myocardial cells. This is an example of:
A. Hyperplasia
B. Metaplasia
C. Hypertrophy
D. Dysplasia
Answer: C
Conceptual Explanation: Hypertrophy is an increase in the size of cells in response to
mechanical load or stress, common in the heart and skeletal muscle where cells cannot
divide (hyperplasia).
, 4. Which type of genetic mutation results in a single base pair substitution that produces a
premature stop codon?
A. Silent mutation
B. Missense mutation
C. Nonsense mutation
D. Frameshift mutation
Answer: C
Conceptual Explanation: A nonsense mutation changes a codon for an amino acid into a
stop codon, leading to the termination of translation and a truncated protein.
5. Which epigenetic mechanism involves the attachment of a methyl group to a cytosine
base, typically leading to gene silencing?
A. DNA methylation
B. Histone acetylation
C. RNA interference
D. X-inactivation
Answer: A
Conceptual Explanation: DNA methylation at CpG islands usually inhibits the binding of
transcription factors, thereby silencing the gene.
PATHOPHYSIOLOGY
COMPREHENSIVE STUDY EXAM
QUESTIONS AND ANSWERS 100%
VERIFIED BY EXPERTS. 2026/2027
1. A patient is experiencing muscular atrophy following the removal of a limb cast. Which
cellular mechanism is primarily responsible for this change?
A. Increased protein synthesis and organelle duplication
B. Cellular swelling due to sodium-potassium pump failure
C. Decreased protein synthesis and increased protein catabolism
D. Replacement of one mature cell type by another
Answer: C
Conceptual Explanation: Atrophy is a decrease in cellular size caused by aging, disuse, or
reduced blood supply. It involves decreased protein synthesis and/or increased protein
degradation via the ubiquitin-proteasome pathway.
2. Which process describes the programmed cell death that prevents an inflammatory
response by neatly packaging cellular contents into membrane-bound vesicles?
A. Liquefactive necrosis
,B. Coagulative necrosis
C. Autolysis
D. Apoptosis
Answer: D
Conceptual Explanation: Apoptosis is distinct from necrosis as it is a regulated,
programmed process that does not cause inflammation. Cells shrink and fragment into
apoptotic bodies that are phagocytized.
3. A 55-year-old male with chronic hypertension shows an increase in the size of the left
ventricular myocardial cells. This is an example of:
A. Hyperplasia
B. Metaplasia
C. Hypertrophy
D. Dysplasia
Answer: C
Conceptual Explanation: Hypertrophy is an increase in the size of cells in response to
mechanical load or stress, common in the heart and skeletal muscle where cells cannot
divide (hyperplasia).
, 4. Which type of genetic mutation results in a single base pair substitution that produces a
premature stop codon?
A. Silent mutation
B. Missense mutation
C. Nonsense mutation
D. Frameshift mutation
Answer: C
Conceptual Explanation: A nonsense mutation changes a codon for an amino acid into a
stop codon, leading to the termination of translation and a truncated protein.
5. Which epigenetic mechanism involves the attachment of a methyl group to a cytosine
base, typically leading to gene silencing?
A. DNA methylation
B. Histone acetylation
C. RNA interference
D. X-inactivation
Answer: A
Conceptual Explanation: DNA methylation at CpG islands usually inhibits the binding of
transcription factors, thereby silencing the gene.
