NURS 5220 ADVANCED
PATHOPHYSIOLOGY FINAL EXAM
REVIEW QUESTIONS & VERIFIED
ANSWERS (A+ GUARANTEE)
1. Which molecular mechanism is primarily responsible for cellular damage during ischemia-
reperfusion injury?
A. Increased synthesis of ATP via anaerobic glycolysis
B. Generation of reactive oxygen species (ROS) and calcium overload
C. Activation of the sodium-potassium pump
D. Inhibition of the mitochondrial permeability transition pore
Answer: B
Conceptual Explanation: During reperfusion, the restoration of oxygen leads to the
formation of free radicals and reactive oxygen species, which, combined with
mitochondrial calcium overload, causes oxidative stress and membrane damage.
2. In epigenetic regulation, what is the primary effect of DNA methylation on gene
expression?
A. Silencing of gene expression by preventing transcription
B. Enhancement of transcription factor binding
,C. Increasing the rate of mRNA translation
D. Promotion of histone acetylation
Answer: A
Conceptual Explanation: DNA methylation typically occurs at CpG islands and acts to
silence genes by preventing the binding of transcription factors and recruiting proteins that
promote a condensed chromatin state.
3. Which type of hypersensitivity reaction is characterized by the formation of immune
complexes that deposit in vessel walls or extravascular tissues?
A. Type I
B. Type II
C. Type III
D. Type IV
Answer: C
Conceptual Explanation: Type III hypersensitivity involves antigen-antibody (immune)
complexes that are not efficiently cleared and deposit in tissues, leading to complement
activation and neutrophil-mediated inflammation.
4. Which inflammatory mediator is primarily responsible for the systemic vasodilation and
hypotension seen in septic shock?
A. Histamine
, B. Interleukin-10
C. Nitric Oxide
D. Angiotensin II
Answer: C
Conceptual Explanation: In sepsis, pro-inflammatory cytokines like TNF-alpha and IL-1
stimulate the induction of inducible nitric oxide synthase (iNOS), leading to excessive nitric
oxide production and profound vasodilation.
5. What is the hallmark pathological finding in the exudative phase of Acute Respiratory
Distress Syndrome (ARDS)?
A. Bronchoconstriction and mucus plugging
B. Proliferation of Type II pneumocytes
C. Excessive collagen deposition and fibrosis
D. Formation of hyaline membranes and alveolar edema
Answer: D
Conceptual Explanation: The exudative phase of ARDS is characterized by diffuse alveolar
damage, protein-rich edema fluid filling the alveoli, and the formation of hyaline
membranes.
6. How does the RAAS contribute to the progression of chronic kidney disease (CKD)?
A. By causing vasodilation of the afferent arteriole
PATHOPHYSIOLOGY FINAL EXAM
REVIEW QUESTIONS & VERIFIED
ANSWERS (A+ GUARANTEE)
1. Which molecular mechanism is primarily responsible for cellular damage during ischemia-
reperfusion injury?
A. Increased synthesis of ATP via anaerobic glycolysis
B. Generation of reactive oxygen species (ROS) and calcium overload
C. Activation of the sodium-potassium pump
D. Inhibition of the mitochondrial permeability transition pore
Answer: B
Conceptual Explanation: During reperfusion, the restoration of oxygen leads to the
formation of free radicals and reactive oxygen species, which, combined with
mitochondrial calcium overload, causes oxidative stress and membrane damage.
2. In epigenetic regulation, what is the primary effect of DNA methylation on gene
expression?
A. Silencing of gene expression by preventing transcription
B. Enhancement of transcription factor binding
,C. Increasing the rate of mRNA translation
D. Promotion of histone acetylation
Answer: A
Conceptual Explanation: DNA methylation typically occurs at CpG islands and acts to
silence genes by preventing the binding of transcription factors and recruiting proteins that
promote a condensed chromatin state.
3. Which type of hypersensitivity reaction is characterized by the formation of immune
complexes that deposit in vessel walls or extravascular tissues?
A. Type I
B. Type II
C. Type III
D. Type IV
Answer: C
Conceptual Explanation: Type III hypersensitivity involves antigen-antibody (immune)
complexes that are not efficiently cleared and deposit in tissues, leading to complement
activation and neutrophil-mediated inflammation.
4. Which inflammatory mediator is primarily responsible for the systemic vasodilation and
hypotension seen in septic shock?
A. Histamine
, B. Interleukin-10
C. Nitric Oxide
D. Angiotensin II
Answer: C
Conceptual Explanation: In sepsis, pro-inflammatory cytokines like TNF-alpha and IL-1
stimulate the induction of inducible nitric oxide synthase (iNOS), leading to excessive nitric
oxide production and profound vasodilation.
5. What is the hallmark pathological finding in the exudative phase of Acute Respiratory
Distress Syndrome (ARDS)?
A. Bronchoconstriction and mucus plugging
B. Proliferation of Type II pneumocytes
C. Excessive collagen deposition and fibrosis
D. Formation of hyaline membranes and alveolar edema
Answer: D
Conceptual Explanation: The exudative phase of ARDS is characterized by diffuse alveolar
damage, protein-rich edema fluid filling the alveoli, and the formation of hyaline
membranes.
6. How does the RAAS contribute to the progression of chronic kidney disease (CKD)?
A. By causing vasodilation of the afferent arteriole
