NR 507 / NR507 Advanced Pathophysiology Midterm
Exam Complete Guide Actual 2026/2027 with Detailed
Rationales | 100% Verified | Pass Guaranteed – A+
Graded
SECTION 1: Cellular & Molecular Pathophysiology (14 Questions)
Q1: A patient with chronic anemia has an increased number of reticulocytes in the
peripheral blood. Which cellular adaptation best describes this response?
A. Hypertrophy
B. Hyperplasia
C. Metaplasia
D. Dysplasia
Correct Answer: B
Rationale: Correct because hyperplasia is an increase in the number of cells in a
tissue or organ; erythropoietin-stimulated expansion of erythroid progenitors in the
bone marrow is a physiologic example of hyperplasia.
Q2: During ischemic cell injury, which biochemical event occurs first and triggers all
subsequent cellular damage?
A. Lysosomal rupture and enzyme release
B. Mitochondrial swelling and cristae disruption
C. Decreased ATP production from impaired oxidative phosphorylation
D. Plasma membrane phospholipid degradation
Correct Answer: C
Rationale: Correct because decreased ATP production is the earliest and most
critical event in ischemic injury; without oxygen, oxidative phosphorylation ceases,
and ATP depletion triggers ion pump failure, cell swelling, and activation of
degradative enzymes.
,Q3: A 65-year-old male with a history of myocardial infarction has an area of pale,
firm scar tissue replacing myocardium. Microscopically, the cells show preserved
outlines with loss of 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 is the characteristic pattern of
ischemic injury in solid organs such as the heart; denaturation of structural proteins
preserves cell outlines while enzymatic digestion removes nuclei, creating the
"ghost" appearance.
Q4: Which statement accurately distinguishes apoptosis from necrosis?
A. Apoptosis involves cell swelling and inflammatory membrane rupture
B. Necrosis is an ATP-dependent, programmed process
C. Apoptosis produces membrane-bound apoptotic bodies that are phagocytosed
without inflammation
D. Necrosis is triggered by activation of intracellular caspases
Correct Answer: C
Rationale: Correct because apoptosis is an energy-dependent, programmed cell
death pathway that produces membrane-bound apoptotic bodies; these are silently
removed by phagocytes without triggering an inflammatory response, unlike necrosis
which causes cell rupture and inflammation.
Q5: A patient presents with jaundice, dark urine, and elevated unconjugated bilirubin.
Which mechanism is most likely responsible?
A. Common bile duct obstruction
B. Increased red blood cell hemolysis
C. Viral hepatitis with hepatocellular damage
D. Dubin-Johnson syndrome
Correct Answer: B
Rationale: Correct because increased hemolysis produces excess unconjugated
(indirect) bilirubin that exceeds the liver's conjugation capacity; biliary obstruction
and hepatocellular damage typically raise conjugated bilirubin, while Dubin-Johnson
affects conjugated bilirubin excretion.
, Q6: In the cell cycle, which phase is most vulnerable to radiation-induced DNA
damage?
A. G0 phase (quiescent)
B. G1 phase
C. S phase
D. M phase
Correct Answer: D
Rationale: Correct because the M phase (mitosis) is the most radiosensitive phase
due to condensed chromatin structure and the inability to repair DNA damage during
active chromosome segregation; cells in mitosis cannot pause to repair
radiation-induced breaks.
Q7: Which mechanism is primarily responsible for fatty accumulation in hepatocytes
(steatosis)?
A. Increased beta-oxidation of fatty acids
B. Impaired apoprotein synthesis preventing VLDL export
C. Decreased hepatic lipase activity
D. Excessive protein catabolism
Correct Answer: B
Rationale: Correct because impaired synthesis of apoproteins (such as apoB-100
needed for VLDL assembly) prevents export of triglycerides from hepatocytes; this is
the primary mechanism in conditions such as protein malnutrition and some forms
of drug-induced steatosis.
Q8: A patient with emphysema has decreased serum alpha-1 antitrypsin. Which
pathophysiologic process is most directly responsible for alveolar wall destruction?
A. Uninhibited neutrophil elastase degrading elastic fibers
B. Excessive collagen deposition in alveolar septa
C. Increased surfactant production
D. Mast cell-mediated bronchoconstriction
Correct Answer: A
Rationale: Correct because alpha-1 antitrypsin normally inhibits neutrophil elastase
and other serine proteases; deficiency allows uninhibited elastase activity to degrade
elastic fibers and other structural proteins in alveolar walls, causing emphysematous
destruction.
Q9: Which reactive oxygen species is generated first during reperfusion injury
following myocardial ischemia?
Exam Complete Guide Actual 2026/2027 with Detailed
Rationales | 100% Verified | Pass Guaranteed – A+
Graded
SECTION 1: Cellular & Molecular Pathophysiology (14 Questions)
Q1: A patient with chronic anemia has an increased number of reticulocytes in the
peripheral blood. Which cellular adaptation best describes this response?
A. Hypertrophy
B. Hyperplasia
C. Metaplasia
D. Dysplasia
Correct Answer: B
Rationale: Correct because hyperplasia is an increase in the number of cells in a
tissue or organ; erythropoietin-stimulated expansion of erythroid progenitors in the
bone marrow is a physiologic example of hyperplasia.
Q2: During ischemic cell injury, which biochemical event occurs first and triggers all
subsequent cellular damage?
A. Lysosomal rupture and enzyme release
B. Mitochondrial swelling and cristae disruption
C. Decreased ATP production from impaired oxidative phosphorylation
D. Plasma membrane phospholipid degradation
Correct Answer: C
Rationale: Correct because decreased ATP production is the earliest and most
critical event in ischemic injury; without oxygen, oxidative phosphorylation ceases,
and ATP depletion triggers ion pump failure, cell swelling, and activation of
degradative enzymes.
,Q3: A 65-year-old male with a history of myocardial infarction has an area of pale,
firm scar tissue replacing myocardium. Microscopically, the cells show preserved
outlines with loss of 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 is the characteristic pattern of
ischemic injury in solid organs such as the heart; denaturation of structural proteins
preserves cell outlines while enzymatic digestion removes nuclei, creating the
"ghost" appearance.
Q4: Which statement accurately distinguishes apoptosis from necrosis?
A. Apoptosis involves cell swelling and inflammatory membrane rupture
B. Necrosis is an ATP-dependent, programmed process
C. Apoptosis produces membrane-bound apoptotic bodies that are phagocytosed
without inflammation
D. Necrosis is triggered by activation of intracellular caspases
Correct Answer: C
Rationale: Correct because apoptosis is an energy-dependent, programmed cell
death pathway that produces membrane-bound apoptotic bodies; these are silently
removed by phagocytes without triggering an inflammatory response, unlike necrosis
which causes cell rupture and inflammation.
Q5: A patient presents with jaundice, dark urine, and elevated unconjugated bilirubin.
Which mechanism is most likely responsible?
A. Common bile duct obstruction
B. Increased red blood cell hemolysis
C. Viral hepatitis with hepatocellular damage
D. Dubin-Johnson syndrome
Correct Answer: B
Rationale: Correct because increased hemolysis produces excess unconjugated
(indirect) bilirubin that exceeds the liver's conjugation capacity; biliary obstruction
and hepatocellular damage typically raise conjugated bilirubin, while Dubin-Johnson
affects conjugated bilirubin excretion.
, Q6: In the cell cycle, which phase is most vulnerable to radiation-induced DNA
damage?
A. G0 phase (quiescent)
B. G1 phase
C. S phase
D. M phase
Correct Answer: D
Rationale: Correct because the M phase (mitosis) is the most radiosensitive phase
due to condensed chromatin structure and the inability to repair DNA damage during
active chromosome segregation; cells in mitosis cannot pause to repair
radiation-induced breaks.
Q7: Which mechanism is primarily responsible for fatty accumulation in hepatocytes
(steatosis)?
A. Increased beta-oxidation of fatty acids
B. Impaired apoprotein synthesis preventing VLDL export
C. Decreased hepatic lipase activity
D. Excessive protein catabolism
Correct Answer: B
Rationale: Correct because impaired synthesis of apoproteins (such as apoB-100
needed for VLDL assembly) prevents export of triglycerides from hepatocytes; this is
the primary mechanism in conditions such as protein malnutrition and some forms
of drug-induced steatosis.
Q8: A patient with emphysema has decreased serum alpha-1 antitrypsin. Which
pathophysiologic process is most directly responsible for alveolar wall destruction?
A. Uninhibited neutrophil elastase degrading elastic fibers
B. Excessive collagen deposition in alveolar septa
C. Increased surfactant production
D. Mast cell-mediated bronchoconstriction
Correct Answer: A
Rationale: Correct because alpha-1 antitrypsin normally inhibits neutrophil elastase
and other serine proteases; deficiency allows uninhibited elastase activity to degrade
elastic fibers and other structural proteins in alveolar walls, causing emphysematous
destruction.
Q9: Which reactive oxygen species is generated first during reperfusion injury
following myocardial ischemia?
