NR 507 / NR507 Advanced Pathophysiology Final Exam
Guide Actual 2026/2027 with Detailed Rationales |
100% Verified | Pass Guaranteed – A+ Graded
SECTION 1: CELLULAR & MOLECULAR PATHOPHYSIOLOGY (14
Questions)
Q1: A cell is exposed to hypoxia. Which intracellular change occurs first during
reversible cell injury?
A. Nuclear pyknosis and karyorrhexis
B. Decreased ATP production and cellular swelling
C. Activation of caspases and DNA fragmentation
D. Lysosomal rupture and enzymatic autodigestion
Correct Answer: B
Rationale: Correct because decreased ATP from impaired oxidative phosphorylation
causes the Na+/K+ pump to fail, leading to cellular swelling and hydropic change as
the earliest reversible injury.
Q2: A patient with chronic hypertension develops left ventricular hypertrophy. Which
type of cellular adaptation is this?
A. Hyperplasia
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Correct Answer: B
Rationale: Correct because hypertrophy is an increase in cell size (not number) in
response to increased workload; cardiac muscle cannot undergo hyperplasia,
making hypertrophy the primary adaptive response.
,Q3: A 55-year-old smoker develops squamous metaplasia in the bronchial
epithelium. Which statement best describes this adaptation?
A. It is an irreversible change that always progresses to cancer
B. It is a reversible change of one differentiated cell type to another
C. It represents an increase in the number of epithelial cells
D. It is a disordered growth pattern with loss of cellular maturation
Correct Answer: B
Rationale: Correct because metaplasia is the reversible replacement of one
differentiated cell type by another in response to chronic irritation; it is a protective
adaptation but can be a precursor to dysplasia.
Q4: A cell undergoes programmed cell death characterized by cell shrinkage,
chromatin condensation, and formation of apoptotic bodies. Which process is
occurring?
A. Coagulative necrosis
B. Apoptosis
C. Caseous necrosis
D. Liquefactive necrosis
Correct Answer: B
Rationale: Correct because apoptosis is programmed cell death involving cell
shrinkage, chromatin condensation, membrane blebbing, and phagocytosis of
apoptotic bodies without inflammation.
Q5: A patient with a myocardial infarction has necrotic cardiac tissue that preserves
cellular outlines but loses nuclei. Which type of necrosis is present?
A. Liquefactive necrosis
B. Caseous necrosis
C. Coagulative necrosis
D. Fat necrosis
Correct Answer: C
Rationale: Correct because coagulative necrosis in ischemic tissue preserves the
architectural framework of dead cells while denaturing proteins; it is characteristic of
infarction in all solid organs except the brain.
, Q6: A patient presents with jaundice and dark urine. Laboratory studies show
elevated direct bilirubin. Which mechanism best explains this finding?
A. Increased hemolysis of red blood cells
B. Decreased hepatic uptake of unconjugated bilirubin
C. Impaired hepatocellular excretion of conjugated bilirubin into bile
D. Inherited deficiency of UDP-glucuronosyltransferase enzyme
Correct Answer: C
Rationale: Correct because elevated direct (conjugated) bilirubin indicates a
post-hepatic or intrahepatic obstructive process where conjugated bilirubin cannot
be excreted into bile and refluxes into blood.
Q7: A cell is exposed to ionizing radiation. Which molecule is the primary target that
initiates cellular damage?
A. Cell membrane phospholipids
B. Nuclear DNA
C. Mitochondrial RNA
D. Cytoplasmic proteins
Correct Answer: B
Rationale: Correct because ionizing radiation primarily damages cells by causing
direct DNA strand breaks and free radical formation; DNA is the most critical target
for radiation-induced cell injury and carcinogenesis.
Q8: A patient with chronic alcohol abuse develops fatty liver. Which metabolic
pathway is most directly impaired?
A. Beta-oxidation of fatty acids in mitochondria
B. Glycogenolysis in hepatocytes
C. Protein synthesis on ribosomes
D. Gluconeogenesis in the cytoplasm
Correct Answer: A
Rationale: Correct because ethanol metabolism generates NADH, which inhibits
beta-oxidation of fatty acids and promotes triglyceride synthesis, leading to hepatic
steatosis (fatty liver).
Guide Actual 2026/2027 with Detailed Rationales |
100% Verified | Pass Guaranteed – A+ Graded
SECTION 1: CELLULAR & MOLECULAR PATHOPHYSIOLOGY (14
Questions)
Q1: A cell is exposed to hypoxia. Which intracellular change occurs first during
reversible cell injury?
A. Nuclear pyknosis and karyorrhexis
B. Decreased ATP production and cellular swelling
C. Activation of caspases and DNA fragmentation
D. Lysosomal rupture and enzymatic autodigestion
Correct Answer: B
Rationale: Correct because decreased ATP from impaired oxidative phosphorylation
causes the Na+/K+ pump to fail, leading to cellular swelling and hydropic change as
the earliest reversible injury.
Q2: A patient with chronic hypertension develops left ventricular hypertrophy. Which
type of cellular adaptation is this?
A. Hyperplasia
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Correct Answer: B
Rationale: Correct because hypertrophy is an increase in cell size (not number) in
response to increased workload; cardiac muscle cannot undergo hyperplasia,
making hypertrophy the primary adaptive response.
,Q3: A 55-year-old smoker develops squamous metaplasia in the bronchial
epithelium. Which statement best describes this adaptation?
A. It is an irreversible change that always progresses to cancer
B. It is a reversible change of one differentiated cell type to another
C. It represents an increase in the number of epithelial cells
D. It is a disordered growth pattern with loss of cellular maturation
Correct Answer: B
Rationale: Correct because metaplasia is the reversible replacement of one
differentiated cell type by another in response to chronic irritation; it is a protective
adaptation but can be a precursor to dysplasia.
Q4: A cell undergoes programmed cell death characterized by cell shrinkage,
chromatin condensation, and formation of apoptotic bodies. Which process is
occurring?
A. Coagulative necrosis
B. Apoptosis
C. Caseous necrosis
D. Liquefactive necrosis
Correct Answer: B
Rationale: Correct because apoptosis is programmed cell death involving cell
shrinkage, chromatin condensation, membrane blebbing, and phagocytosis of
apoptotic bodies without inflammation.
Q5: A patient with a myocardial infarction has necrotic cardiac tissue that preserves
cellular outlines but loses nuclei. Which type of necrosis is present?
A. Liquefactive necrosis
B. Caseous necrosis
C. Coagulative necrosis
D. Fat necrosis
Correct Answer: C
Rationale: Correct because coagulative necrosis in ischemic tissue preserves the
architectural framework of dead cells while denaturing proteins; it is characteristic of
infarction in all solid organs except the brain.
, Q6: A patient presents with jaundice and dark urine. Laboratory studies show
elevated direct bilirubin. Which mechanism best explains this finding?
A. Increased hemolysis of red blood cells
B. Decreased hepatic uptake of unconjugated bilirubin
C. Impaired hepatocellular excretion of conjugated bilirubin into bile
D. Inherited deficiency of UDP-glucuronosyltransferase enzyme
Correct Answer: C
Rationale: Correct because elevated direct (conjugated) bilirubin indicates a
post-hepatic or intrahepatic obstructive process where conjugated bilirubin cannot
be excreted into bile and refluxes into blood.
Q7: A cell is exposed to ionizing radiation. Which molecule is the primary target that
initiates cellular damage?
A. Cell membrane phospholipids
B. Nuclear DNA
C. Mitochondrial RNA
D. Cytoplasmic proteins
Correct Answer: B
Rationale: Correct because ionizing radiation primarily damages cells by causing
direct DNA strand breaks and free radical formation; DNA is the most critical target
for radiation-induced cell injury and carcinogenesis.
Q8: A patient with chronic alcohol abuse develops fatty liver. Which metabolic
pathway is most directly impaired?
A. Beta-oxidation of fatty acids in mitochondria
B. Glycogenolysis in hepatocytes
C. Protein synthesis on ribosomes
D. Gluconeogenesis in the cytoplasm
Correct Answer: A
Rationale: Correct because ethanol metabolism generates NADH, which inhibits
beta-oxidation of fatty acids and promotes triglyceride synthesis, leading to hepatic
steatosis (fatty liver).
