ADVANCED PATHOPHYSIOLOGY NURS 6501:
COMPREHENSIVE EXAMINATION STUDY
GUIDE
SECTION A: CELLULAR PATHOPHYSIOLOGY AND GENETICS
(Questions 1-15)
1. A 45-year-old patient presents with fatigue, pallor, and dyspnea on exertion. Laboratory
findings reveal macrocytic anemia with hypersegmented neutrophils. Which of the
following cellular mechanisms best explains these findings?
A. Impaired DNA synthesis due to vitamin B12 or folate deficiency
B. Decreased iron absorption in the gastrointestinal tract
C. Increased hemolysis of red blood cells in the spleen
D. Decreased erythropoietin production by the kidneys
Answer: A
2. In a patient with cystic fibrosis, a mutation in the CFTR gene leads to defective chloride
channel function. Which of the following pathophysiological consequences is most directly
responsible for the viscous mucus production observed in the respiratory tract?
,A. Increased sodium reabsorption in airway epithelial cells
B. Decreased water secretion into the airway lumen
C. Increased chloride secretion into the airway lumen
D. Decreased sodium reabsorption in airway epithelial cells
Answer: B
3. A 60-year-old patient with chronic obstructive pulmonary disease develops cor
pulmonale. The underlying pathophysiological mechanism that leads to right ventricular
hypertrophy in this condition is:
A. Increased systemic vascular resistance
B. Pulmonary hypertension secondary to hypoxic vasoconstriction
C. Decreased cardiac output from left ventricular failure
D. Increased blood volume from secondary polycythemia
Answer: B
4. A researcher is studying cellular adaptation mechanisms in response to chronic
ischemia. Which of the following cellular changes would most likely be observed in
myocardial tissue subjected to prolonged reduced blood flow?
A. Hyperplasia of cardiomyocytes
B. Hypertrophy of remaining cardiomyocytes
C. Metaplasia of cardiac muscle to smooth muscle
D. Dysplasia of cardiac conduction cells
,Answer: B
5. A 55-year-old woman with a history of hypertension presents with progressive dyspnea
and peripheral edema. Echocardiography reveals concentric left ventricular hypertrophy.
The cellular mechanism most responsible for this adaptive change is:
A. Increased cell division of cardiomyocytes
B. Increased protein synthesis in existing cardiomyocytes
C. Conversion of cardiac fibroblasts to myocytes
D. Increased apoptosis of interstitial cells
Answer: B
6. A patient presents with jaundice, dark urine, and pale stools. Laboratory findings show
elevated unconjugated bilirubin, normal liver enzymes, and no evidence of hemolysis.
Which of the following genetic conditions is most likely responsible for these findings?
A. Gilbert syndrome
B. Dubin-Johnson syndrome
C. Crigler-Najjar syndrome type I
D. Rotor syndrome
Answer: A
7. A 30-year-old male with a family history of Huntington's disease undergoes genetic
testing. The pathophysiological mechanism underlying this autosomal dominant disorder
involves:
, A. Expansion of CAG trinucleotide repeats in the HTT gene
B. Deletion of the FMR1 gene on the X chromosome
C. Point mutation in the CFTR gene
D. Translocation between chromosomes 9 and 22
Answer: A
8. A patient with chronic alcoholism develops Wernicke-Korsakoff syndrome. The cellular
mechanism most directly responsible for this neurological condition is:
A. Impaired glucose metabolism due to thiamine deficiency
B. Decreased vitamin B12 absorption in the ileum
C. Increased gamma-aminobutyric acid (GABA) activity
D. Decreased dopamine synthesis in the substantia nigra
Answer: A
9. A 72-year-old patient is diagnosed with Alzheimer's disease. Which of the following
pathophysiological processes at the cellular level is most characteristic of this condition?
A. Alpha-synuclein aggregation in Lewy bodies
B. Beta-amyloid plaque formation and tau protein hyperphosphorylation
C. Dopaminergic neuron degeneration in the substantia nigra
D. Demyelination of central nervous system neurons
Answer: B
COMPREHENSIVE EXAMINATION STUDY
GUIDE
SECTION A: CELLULAR PATHOPHYSIOLOGY AND GENETICS
(Questions 1-15)
1. A 45-year-old patient presents with fatigue, pallor, and dyspnea on exertion. Laboratory
findings reveal macrocytic anemia with hypersegmented neutrophils. Which of the
following cellular mechanisms best explains these findings?
A. Impaired DNA synthesis due to vitamin B12 or folate deficiency
B. Decreased iron absorption in the gastrointestinal tract
C. Increased hemolysis of red blood cells in the spleen
D. Decreased erythropoietin production by the kidneys
Answer: A
2. In a patient with cystic fibrosis, a mutation in the CFTR gene leads to defective chloride
channel function. Which of the following pathophysiological consequences is most directly
responsible for the viscous mucus production observed in the respiratory tract?
,A. Increased sodium reabsorption in airway epithelial cells
B. Decreased water secretion into the airway lumen
C. Increased chloride secretion into the airway lumen
D. Decreased sodium reabsorption in airway epithelial cells
Answer: B
3. A 60-year-old patient with chronic obstructive pulmonary disease develops cor
pulmonale. The underlying pathophysiological mechanism that leads to right ventricular
hypertrophy in this condition is:
A. Increased systemic vascular resistance
B. Pulmonary hypertension secondary to hypoxic vasoconstriction
C. Decreased cardiac output from left ventricular failure
D. Increased blood volume from secondary polycythemia
Answer: B
4. A researcher is studying cellular adaptation mechanisms in response to chronic
ischemia. Which of the following cellular changes would most likely be observed in
myocardial tissue subjected to prolonged reduced blood flow?
A. Hyperplasia of cardiomyocytes
B. Hypertrophy of remaining cardiomyocytes
C. Metaplasia of cardiac muscle to smooth muscle
D. Dysplasia of cardiac conduction cells
,Answer: B
5. A 55-year-old woman with a history of hypertension presents with progressive dyspnea
and peripheral edema. Echocardiography reveals concentric left ventricular hypertrophy.
The cellular mechanism most responsible for this adaptive change is:
A. Increased cell division of cardiomyocytes
B. Increased protein synthesis in existing cardiomyocytes
C. Conversion of cardiac fibroblasts to myocytes
D. Increased apoptosis of interstitial cells
Answer: B
6. A patient presents with jaundice, dark urine, and pale stools. Laboratory findings show
elevated unconjugated bilirubin, normal liver enzymes, and no evidence of hemolysis.
Which of the following genetic conditions is most likely responsible for these findings?
A. Gilbert syndrome
B. Dubin-Johnson syndrome
C. Crigler-Najjar syndrome type I
D. Rotor syndrome
Answer: A
7. A 30-year-old male with a family history of Huntington's disease undergoes genetic
testing. The pathophysiological mechanism underlying this autosomal dominant disorder
involves:
, A. Expansion of CAG trinucleotide repeats in the HTT gene
B. Deletion of the FMR1 gene on the X chromosome
C. Point mutation in the CFTR gene
D. Translocation between chromosomes 9 and 22
Answer: A
8. A patient with chronic alcoholism develops Wernicke-Korsakoff syndrome. The cellular
mechanism most directly responsible for this neurological condition is:
A. Impaired glucose metabolism due to thiamine deficiency
B. Decreased vitamin B12 absorption in the ileum
C. Increased gamma-aminobutyric acid (GABA) activity
D. Decreased dopamine synthesis in the substantia nigra
Answer: A
9. A 72-year-old patient is diagnosed with Alzheimer's disease. Which of the following
pathophysiological processes at the cellular level is most characteristic of this condition?
A. Alpha-synuclein aggregation in Lewy bodies
B. Beta-amyloid plaque formation and tau protein hyperphosphorylation
C. Dopaminergic neuron degeneration in the substantia nigra
D. Demyelination of central nervous system neurons
Answer: B
