NSG 530 ACTUAL EXAM 2026/2027 | Advanced
Pathophysiology – Wilkes University | Exams 1-4
Comprehensive Bank | Verified Q&A with Detailed Rationales
| Pass Guaranteed - A+ Graded
EXAM 1: Cellular Foundation, Fluids, Genetics
Section 1: Cellular Adaptation, Injury, and Death
Q1: A 45-year-old male with chronic hypertension presents with left ventricular
hypertrophy. This cellular adaptation represents which mechanism?
A. Atrophy due to decreased workload
B. Hyperplasia resulting from hormonal stimulation
C. Hypertrophy in response to increased mechanical demand [CORRECT]
D. Metaplasia following chronic irritation
Correct Answer: C
Rationale: Hypertrophy is an increase in cell size resulting in increased tissue mass
without cell division. In chronic hypertension, the left ventricle faces increased afterload
(pressure overload), requiring greater force generation to eject blood. Individual cardiac
myocytes increase in size through synthesis of additional contractile proteins (actin and
myosin), sarcomeres, and organelles. This adaptation maintains cardiac output against
,elevated systemic vascular resistance. Atrophy (A) involves decreased cell size,
opposite of this presentation. Hyperplasia (B) involves increased cell number, which
does not occur in adult cardiac muscle due to limited regenerative capacity. Metaplasia
(D) involves reversible change of one differentiated cell type to another, typically in
epithelial tissues responding to chronic irritation.
Q2: A 62-year-old alcoholic develops hepatic steatosis. Which cellular process BEST
explains the accumulation of triglyceride droplets within hepatocytes?
A. Impaired protein synthesis by rough endoplasmic reticulum
B. Decreased mitochondrial β-oxidation of fatty acids combined with increased
lipogenesis [CORRECT]
C. Enhanced lysosomal degradation of lipid stores
D. Increased nuclear transcription of collagen genes
Correct Answer: B
Rationale: Alcoholic steatosis (fatty liver) results from dual metabolic derangements: (1)
ethanol metabolism by alcohol dehydrogenase and cytochrome P450 2E1 generates
NADH, favoring lipid synthesis and inhibiting fatty acid β-oxidation in mitochondria; (2)
ethanol increases lipogenesis through activation of sterol regulatory element-binding
proteins (SREBPs). Triglycerides accumulate as large cytoplasmic droplets that
displace the nucleus peripherally. Impaired protein synthesis (A) occurs in alcoholism
but does not directly cause steatosis. Lysosomal degradation (C) would decrease, not
increase, lipid accumulation. Collagen gene transcription (D) relates to
fibrosis/cirrhosis, not steatosis.
,Q3: A patient suffers myocardial infarction with subsequent coagulative necrosis. Which
histological feature is characteristic of this cell death pattern?
A. Liquefaction and cavitation with pus formation
B. Preservation of tissue architecture with ghost outlines of dead cells [CORRECT]
C. Caseous necrosis with amorphous granular debris
D. Fat saponification with chalky white deposits
Correct Answer: B
Rationale: Coagulative necrosis, typical of ischemic injury in solid organs (heart, kidney,
spleen), results from denaturation of structural and enzymatic proteins, preventing
cellular dissolution. The hallmark is maintenance of tissue architecture for days after
cell death—dead cells appear as "ghosts" with preserved outlines but without nuclei
(karyolysis, karyorrhexis, or pyknosis). Ischemia inhibits lysosomal enzymes, preventing
autolysis. Liquefactive necrosis (A) occurs in brain infarcts and abscesses due to
enzymatic digestion. Caseous necrosis (C) is associated with tuberculosis, showing
amorphous, cheese-like debris. Fat necrosis (D) occurs in pancreatic or breast tissue
with calcium soap formation.
Q4: Reperfusion injury following ischemic stroke is mediated primarily by which
pathophysiological mechanism?
A. ATP depletion and failure of Na⁺/K⁺-ATPase pumps
B. Generation of reactive oxygen species (ROS) and calcium overload [CORRECT]
, C. Lysosomal membrane rupture and enzymatic autolysis
D. Activation of caspase-independent apoptotic pathways
Correct Answer: B
Rationale: Reperfusion injury occurs when oxygen is reintroduced to ischemic tissue,
driving mitochondrial electron transport chain dysfunction and incomplete oxygen
reduction, generating superoxide anion (O₂⁻•), hydrogen peroxide (H₂O₂), and hydroxyl
radicals (•OH). ROS cause lipid peroxidation, protein oxidation, DNA damage, and
activate MMPs. Simultaneously, reperfusion restores pH, allowing Na⁺/Ca²⁺ exchanger
to reverse, driving Ca²⁺ influx. Calcium overload activates phospholipases, proteases,
and endonucleases. While ATP depletion (A) occurs during ischemia, reperfusion injury
specifically involves ROS-mediated damage. Lysosomal rupture (C) and apoptosis (D)
are secondary phenomena.
Q5: A renal biopsy reveals apoptotic bodies within tubular epithelium. Which molecular
pathway characterizes this programmed cell death?
A. Caspase activation via intrinsic (mitochondrial) or extrinsic (death receptor)
pathways [CORRECT]
B. Rapid cell swelling and plasma membrane rupture
C. Passive energy-independent cellular dissolution
D. Activation of RIPK1/RIPK3 necroptotic kinases
Correct Answer: A
Pathophysiology – Wilkes University | Exams 1-4
Comprehensive Bank | Verified Q&A with Detailed Rationales
| Pass Guaranteed - A+ Graded
EXAM 1: Cellular Foundation, Fluids, Genetics
Section 1: Cellular Adaptation, Injury, and Death
Q1: A 45-year-old male with chronic hypertension presents with left ventricular
hypertrophy. This cellular adaptation represents which mechanism?
A. Atrophy due to decreased workload
B. Hyperplasia resulting from hormonal stimulation
C. Hypertrophy in response to increased mechanical demand [CORRECT]
D. Metaplasia following chronic irritation
Correct Answer: C
Rationale: Hypertrophy is an increase in cell size resulting in increased tissue mass
without cell division. In chronic hypertension, the left ventricle faces increased afterload
(pressure overload), requiring greater force generation to eject blood. Individual cardiac
myocytes increase in size through synthesis of additional contractile proteins (actin and
myosin), sarcomeres, and organelles. This adaptation maintains cardiac output against
,elevated systemic vascular resistance. Atrophy (A) involves decreased cell size,
opposite of this presentation. Hyperplasia (B) involves increased cell number, which
does not occur in adult cardiac muscle due to limited regenerative capacity. Metaplasia
(D) involves reversible change of one differentiated cell type to another, typically in
epithelial tissues responding to chronic irritation.
Q2: A 62-year-old alcoholic develops hepatic steatosis. Which cellular process BEST
explains the accumulation of triglyceride droplets within hepatocytes?
A. Impaired protein synthesis by rough endoplasmic reticulum
B. Decreased mitochondrial β-oxidation of fatty acids combined with increased
lipogenesis [CORRECT]
C. Enhanced lysosomal degradation of lipid stores
D. Increased nuclear transcription of collagen genes
Correct Answer: B
Rationale: Alcoholic steatosis (fatty liver) results from dual metabolic derangements: (1)
ethanol metabolism by alcohol dehydrogenase and cytochrome P450 2E1 generates
NADH, favoring lipid synthesis and inhibiting fatty acid β-oxidation in mitochondria; (2)
ethanol increases lipogenesis through activation of sterol regulatory element-binding
proteins (SREBPs). Triglycerides accumulate as large cytoplasmic droplets that
displace the nucleus peripherally. Impaired protein synthesis (A) occurs in alcoholism
but does not directly cause steatosis. Lysosomal degradation (C) would decrease, not
increase, lipid accumulation. Collagen gene transcription (D) relates to
fibrosis/cirrhosis, not steatosis.
,Q3: A patient suffers myocardial infarction with subsequent coagulative necrosis. Which
histological feature is characteristic of this cell death pattern?
A. Liquefaction and cavitation with pus formation
B. Preservation of tissue architecture with ghost outlines of dead cells [CORRECT]
C. Caseous necrosis with amorphous granular debris
D. Fat saponification with chalky white deposits
Correct Answer: B
Rationale: Coagulative necrosis, typical of ischemic injury in solid organs (heart, kidney,
spleen), results from denaturation of structural and enzymatic proteins, preventing
cellular dissolution. The hallmark is maintenance of tissue architecture for days after
cell death—dead cells appear as "ghosts" with preserved outlines but without nuclei
(karyolysis, karyorrhexis, or pyknosis). Ischemia inhibits lysosomal enzymes, preventing
autolysis. Liquefactive necrosis (A) occurs in brain infarcts and abscesses due to
enzymatic digestion. Caseous necrosis (C) is associated with tuberculosis, showing
amorphous, cheese-like debris. Fat necrosis (D) occurs in pancreatic or breast tissue
with calcium soap formation.
Q4: Reperfusion injury following ischemic stroke is mediated primarily by which
pathophysiological mechanism?
A. ATP depletion and failure of Na⁺/K⁺-ATPase pumps
B. Generation of reactive oxygen species (ROS) and calcium overload [CORRECT]
, C. Lysosomal membrane rupture and enzymatic autolysis
D. Activation of caspase-independent apoptotic pathways
Correct Answer: B
Rationale: Reperfusion injury occurs when oxygen is reintroduced to ischemic tissue,
driving mitochondrial electron transport chain dysfunction and incomplete oxygen
reduction, generating superoxide anion (O₂⁻•), hydrogen peroxide (H₂O₂), and hydroxyl
radicals (•OH). ROS cause lipid peroxidation, protein oxidation, DNA damage, and
activate MMPs. Simultaneously, reperfusion restores pH, allowing Na⁺/Ca²⁺ exchanger
to reverse, driving Ca²⁺ influx. Calcium overload activates phospholipases, proteases,
and endonucleases. While ATP depletion (A) occurs during ischemia, reperfusion injury
specifically involves ROS-mediated damage. Lysosomal rupture (C) and apoptosis (D)
are secondary phenomena.
Q5: A renal biopsy reveals apoptotic bodies within tubular epithelium. Which molecular
pathway characterizes this programmed cell death?
A. Caspase activation via intrinsic (mitochondrial) or extrinsic (death receptor)
pathways [CORRECT]
B. Rapid cell swelling and plasma membrane rupture
C. Passive energy-independent cellular dissolution
D. Activation of RIPK1/RIPK3 necroptotic kinases
Correct Answer: A
