,Rasmussen Pathophysiology Final Exam 2026/2027
– 200 Practice Questions with Detailed Rationales
Section 1: Cellular Injury, Adaptation & Death (Questions 1–25)
1. A 68-year-old male with long-standing hypertension presents with an echocardiogram
demonstrating increased left ventricular wall thickness. The cardiologist explains this represents an
adaptive response to chronically elevated afterload. Which cellular adaptation mechanism best
explains this finding?
A. Atrophy due to decreased workload
B. Hypertrophy from increased workload
C. Hyperplasia from hormonal stimulation
D. Metaplasia from chronic irritation
Correct Answer: B
Rationale: Hypertrophy is an increase in cell size in response to increased workload, classically seen in
cardiac myocytes adapting to elevated afterload in hypertension. Atrophy is the opposite (decrease in
cell size), hyperplasia is an increase in cell number (not applicable to permanently divided cells like
cardiac myocytes), and metaplasia is reversible replacement of one adult cell type with another.
2. A 55-year-old chronic smoker undergoes bronchoscopy with biopsy of the bronchial epithelium.
Pathology reveals replacement of the normal ciliated pseudostratified columnar epithelium with
stratified squamous epithelium. This cellular adaptation is best classified as:
A. Dysplasia
B. Metaplasia
C. Anaplasia
D. Hyperplasia
Correct Answer: B
Rationale: Metaplasia is the reversible replacement of one differentiated adult cell type with another,
often as an adaptive substitution to chronic irritation (e.g., squamous metaplasia in bronchi of smokers).
Dysplasia indicates disordered growth with atypical cells (a pre-neoplastic change), anaplasia refers to
lack of differentiation in cancer cells, and hyperplasia is increased cell number. Metaplasia is initially
protective but reduces mucus clearance, predisposing to infection and malignancy.
3. A pathologist evaluating a renal biopsy notes cells exhibiting irreversible injury. Which finding is
most indicative of irreversible cellular injury and impending cell death?
A. Cellular swelling and steatosis
B. Mitochondrial swelling and dispersion of ribosomes
,C. Severe depletion of intracellular glycogen
D. Rupture of the lysosomal and plasma membranes
Correct Answer: D
Rationale: Rupture of lysosomal and plasma membranes is a hallmark of irreversible injury because it
releases hydrolytic enzymes into the cytoplasm and triggers uncontrolled digestion, inflammation, and
cell death. Cellular swelling, mitochondrial swelling, ribosomal dispersion, and glycogen depletion are
features of reversible injury that may progress but are not, by themselves, irreversible markers. The key
event distinguishing reversible from irreversible injury is profound membrane damage.
4. A 45-year-old female presents with a cold, pulseless, blue-tinged lower extremity following 6 hours
of femoral artery thrombosis. The affected tissue undergoes infarction. Which type of necrosis is most
expected in this ischemic tissue?
A. Liquefactive necrosis
B. Coagulative necrosis
C. Caseous necrosis
D. Fat necrosis
Correct Answer: B
Rationale: Coagulative necrosis is the typical pattern of cell death in solid organs (heart, kidney, spleen)
following ischemia, in which cellular architecture is preserved for some time because denatured
proteins retain structure while enzymatic digestion is impaired. Liquefactive necrosis occurs in the brain
(ischemic stroke) or with bacterial infection (abscess). Caseous necrosis is associated with tuberculosis,
and fat necrosis occurs in pancreatic lipase exposure to adipose tissue.
5. A 70-year-old female with a femoral fracture develops a fat embolism and dies 48 hours later.
Autopsy reveals chalky-white, soap-like deposits in subcutaneous fat of the lower limbs. This
appearance is pathognomonic for which type of necrosis?
A. Caseous necrosis
B. Liquefactive necrosis
C. Fat necrosis
D. Fibrinoid necrosis
Correct Answer: C
Rationale: Fat necrosis occurs when lipase enzymes (often pancreatic, but also from inflammatory cells)
digest triglycerides into free fatty acids that combine with calcium to form soap-like, chalky-white
deposits. Caseous necrosis has a cheese-like appearance in TB, liquefactive necrosis results in liquid pus,
and fibrinoid necrosis involves immune complex deposition in vessel walls (not grossly visible as chalky
deposits).
, 6. An infant born with tracheoesophageal fistula undergoes surgical correction. During development,
the cells destined to die to allow separation of trachea and esophagus undergo a programmed process
characterized by chromatin condensation, cell shrinkage, and apoptotic body formation. This process
is best described as:
A. Coagulative necrosis
B. Apoptosis
C. Autophagy
D. Liquefactive necrosis
Correct Answer: B
Rationale: Apoptosis is programmed cell death, characterized by cell shrinkage, chromatin
condensation, membrane blebbing, and formation of apoptotic bodies that are phagocytosed without
significant inflammation. It is essential in development, tissue homeostasis, and immune regulation.
Unlike necrosis, apoptosis is energy-dependent, highly regulated, and does not elicit an inflammatory
response.
7. A 28-year-old male rescuing hikers at high altitude (5500 m) develops confusion, ataxia, and
decreased consciousness. Cerebral cells are exposed to chronic hypoxia. In the pathophysiology of
hypoxic injury, which cellular event occurs first as oxygen tension declines?
A. Decreased ATP production leading to Na⁺/K⁺ pump failure
B. Activation of lysosomal enzymes and membrane rupture
C. Free radical generation in mitochondria
D. Calcium influx triggering apoptosis
Correct Answer: A
Rationale: Hypoxia first decreases oxidative phosphorylation in mitochondria, reducing ATP synthesis.
With insufficient ATP, the Na⁺/K⁺-ATPase pump fails, allowing sodium (and water) to enter the cell
causing cellular swelling, potassium to leave, and calcium to accumulate intracellularly. Subsequent
events—free radical formation, lysosomal enzyme activation, and apoptosis—follow this initial ATP
depletion, making energy failure the earliest pathophysiologic event.
8. A 50-year-old welder presents with chronic copper exposure. Laboratory findings suggest hepatic
injury caused by reactive oxygen species. Which statement best describes the role of free radicals in
cellular injury?
A. They enhance mitochondrial oxidative phosphorylation
B. They are stable molecules that improve DNA repair
C. They damage lipids, proteins, and DNA through oxidative reactions
D. They activate protective antioxidant pathways only
Correct Answer: C
– 200 Practice Questions with Detailed Rationales
Section 1: Cellular Injury, Adaptation & Death (Questions 1–25)
1. A 68-year-old male with long-standing hypertension presents with an echocardiogram
demonstrating increased left ventricular wall thickness. The cardiologist explains this represents an
adaptive response to chronically elevated afterload. Which cellular adaptation mechanism best
explains this finding?
A. Atrophy due to decreased workload
B. Hypertrophy from increased workload
C. Hyperplasia from hormonal stimulation
D. Metaplasia from chronic irritation
Correct Answer: B
Rationale: Hypertrophy is an increase in cell size in response to increased workload, classically seen in
cardiac myocytes adapting to elevated afterload in hypertension. Atrophy is the opposite (decrease in
cell size), hyperplasia is an increase in cell number (not applicable to permanently divided cells like
cardiac myocytes), and metaplasia is reversible replacement of one adult cell type with another.
2. A 55-year-old chronic smoker undergoes bronchoscopy with biopsy of the bronchial epithelium.
Pathology reveals replacement of the normal ciliated pseudostratified columnar epithelium with
stratified squamous epithelium. This cellular adaptation is best classified as:
A. Dysplasia
B. Metaplasia
C. Anaplasia
D. Hyperplasia
Correct Answer: B
Rationale: Metaplasia is the reversible replacement of one differentiated adult cell type with another,
often as an adaptive substitution to chronic irritation (e.g., squamous metaplasia in bronchi of smokers).
Dysplasia indicates disordered growth with atypical cells (a pre-neoplastic change), anaplasia refers to
lack of differentiation in cancer cells, and hyperplasia is increased cell number. Metaplasia is initially
protective but reduces mucus clearance, predisposing to infection and malignancy.
3. A pathologist evaluating a renal biopsy notes cells exhibiting irreversible injury. Which finding is
most indicative of irreversible cellular injury and impending cell death?
A. Cellular swelling and steatosis
B. Mitochondrial swelling and dispersion of ribosomes
,C. Severe depletion of intracellular glycogen
D. Rupture of the lysosomal and plasma membranes
Correct Answer: D
Rationale: Rupture of lysosomal and plasma membranes is a hallmark of irreversible injury because it
releases hydrolytic enzymes into the cytoplasm and triggers uncontrolled digestion, inflammation, and
cell death. Cellular swelling, mitochondrial swelling, ribosomal dispersion, and glycogen depletion are
features of reversible injury that may progress but are not, by themselves, irreversible markers. The key
event distinguishing reversible from irreversible injury is profound membrane damage.
4. A 45-year-old female presents with a cold, pulseless, blue-tinged lower extremity following 6 hours
of femoral artery thrombosis. The affected tissue undergoes infarction. Which type of necrosis is most
expected in this ischemic tissue?
A. Liquefactive necrosis
B. Coagulative necrosis
C. Caseous necrosis
D. Fat necrosis
Correct Answer: B
Rationale: Coagulative necrosis is the typical pattern of cell death in solid organs (heart, kidney, spleen)
following ischemia, in which cellular architecture is preserved for some time because denatured
proteins retain structure while enzymatic digestion is impaired. Liquefactive necrosis occurs in the brain
(ischemic stroke) or with bacterial infection (abscess). Caseous necrosis is associated with tuberculosis,
and fat necrosis occurs in pancreatic lipase exposure to adipose tissue.
5. A 70-year-old female with a femoral fracture develops a fat embolism and dies 48 hours later.
Autopsy reveals chalky-white, soap-like deposits in subcutaneous fat of the lower limbs. This
appearance is pathognomonic for which type of necrosis?
A. Caseous necrosis
B. Liquefactive necrosis
C. Fat necrosis
D. Fibrinoid necrosis
Correct Answer: C
Rationale: Fat necrosis occurs when lipase enzymes (often pancreatic, but also from inflammatory cells)
digest triglycerides into free fatty acids that combine with calcium to form soap-like, chalky-white
deposits. Caseous necrosis has a cheese-like appearance in TB, liquefactive necrosis results in liquid pus,
and fibrinoid necrosis involves immune complex deposition in vessel walls (not grossly visible as chalky
deposits).
, 6. An infant born with tracheoesophageal fistula undergoes surgical correction. During development,
the cells destined to die to allow separation of trachea and esophagus undergo a programmed process
characterized by chromatin condensation, cell shrinkage, and apoptotic body formation. This process
is best described as:
A. Coagulative necrosis
B. Apoptosis
C. Autophagy
D. Liquefactive necrosis
Correct Answer: B
Rationale: Apoptosis is programmed cell death, characterized by cell shrinkage, chromatin
condensation, membrane blebbing, and formation of apoptotic bodies that are phagocytosed without
significant inflammation. It is essential in development, tissue homeostasis, and immune regulation.
Unlike necrosis, apoptosis is energy-dependent, highly regulated, and does not elicit an inflammatory
response.
7. A 28-year-old male rescuing hikers at high altitude (5500 m) develops confusion, ataxia, and
decreased consciousness. Cerebral cells are exposed to chronic hypoxia. In the pathophysiology of
hypoxic injury, which cellular event occurs first as oxygen tension declines?
A. Decreased ATP production leading to Na⁺/K⁺ pump failure
B. Activation of lysosomal enzymes and membrane rupture
C. Free radical generation in mitochondria
D. Calcium influx triggering apoptosis
Correct Answer: A
Rationale: Hypoxia first decreases oxidative phosphorylation in mitochondria, reducing ATP synthesis.
With insufficient ATP, the Na⁺/K⁺-ATPase pump fails, allowing sodium (and water) to enter the cell
causing cellular swelling, potassium to leave, and calcium to accumulate intracellularly. Subsequent
events—free radical formation, lysosomal enzyme activation, and apoptosis—follow this initial ATP
depletion, making energy failure the earliest pathophysiologic event.
8. A 50-year-old welder presents with chronic copper exposure. Laboratory findings suggest hepatic
injury caused by reactive oxygen species. Which statement best describes the role of free radicals in
cellular injury?
A. They enhance mitochondrial oxidative phosphorylation
B. They are stable molecules that improve DNA repair
C. They damage lipids, proteins, and DNA through oxidative reactions
D. They activate protective antioxidant pathways only
Correct Answer: C
