NU606 Advanced Pathophysiology Exam 1
Version 1 | Regis University Questions &
Verified Answers with Expert Rationales
• NU606 Advanced Pathophysiology Exam 1 – Regis University | 200 Questions,
Verified Answers & Expert EXPERT RATIONALE. This document covers all major
exam topics with five-option MCQs, bolded correct answers, and detailed EXPERT
RATIONALEs to reinforce understanding.
• How to study: Attempt each question independently before reading the correct
answer, then study the EXPERT RATIONALE deeply — focus on the "why" behind
each answer to master the pathophysiological concepts tested at the graduate
level.
QUESTION 1. A patient develops cell swelling and vacuolation following a
period of ischemia. Which mechanism is primarily responsible for this
finding?
A. Activation of apoptotic caspases
B. Increased lysosomal membrane permeability
C. Failure of the Na⁺/K⁺-ATPase pump due to ATP depletion
D. Enhanced mitochondrial biogenesis
E. Upregulation of oxidative phosphorylation
✓ Correct Answer: C. Failure of the Na⁺/K⁺-ATPase pump due to ATP depletion
EXPERT RATIONALE: Ischemia depletes ATP, impairing the Na⁺/K⁺-ATPase pump.
Sodium and water accumulate intracellularly, causing hydropic (cellular) swelling —
the earliest morphological sign of reversible cell injury.
QUESTION 2. Which type of cell death is characterized by chromatin
condensation, cell shrinkage, membrane blebbing, and formation of apoptotic
bodies without inflammation?
, A. Coagulative necrosis
B. Liquefactive necrosis
C. Pyroptosis
D. Apoptosis
E. Caseous necrosis
✓ Correct Answer: D. Apoptosis
EXPERT RATIONALE: Apoptosis is programmed cell death characterized by cell
shrinkage, chromatin condensation, membrane blebbing, and apoptotic body
formation. It does not trigger an inflammatory response because cell contents are
neatly packaged and phagocytosed.
QUESTION 3. A patient with chronic hypertension develops left ventricular
wall thickening without chamber dilation. This is an example of which cellular
adaptation?
A. Hyperplasia
B. Metaplasia
C. Atrophy
D. Dysplasia
E. Hypertrophy
✓ Correct Answer: E. Hypertrophy
EXPERT RATIONALE: Hypertrophy is an increase in cell size in response to
increased workload. Cardiac myocytes cannot divide, so they enlarge (hypertrophy)
in response to chronic pressure overload from hypertension, resulting in concentric
left ventricular hypertrophy.
QUESTION 4. A chronic smoker develops columnar-to-squamous epithelial
change in the bronchial lining. This is best described as:
, A. Dysplasia
B. Anaplasia
C. Metaplasia
D. Hyperplasia
E. Neoplasia
✓ Correct Answer: C. Metaplasia
EXPERT RATIONALE: Metaplasia is the reversible replacement of one differentiated
cell type with another. Chronic irritation from smoking causes bronchial
pseudostratified columnar epithelium to be replaced by stratified squamous
epithelium — a protective but potentially pre-malignant adaptation.
QUESTION 5. Which form of necrosis is most commonly seen following
myocardial infarction?
A. Liquefactive necrosis
B. Caseous necrosis
C. Fat necrosis
D. Gangrenous necrosis
E. Coagulative necrosis
✓ Correct Answer: E. Coagulative necrosis
EXPERT RATIONALE: Coagulative necrosis results from ischemia in solid organs.
The tissue architecture is preserved ("ghost cells") because denatured proteins
resist proteolysis. This is the hallmark of MI, renal infarction, and most solid organ
infarcts.
QUESTION 6. Free radical injury contributes to cell damage through which
primary mechanism?
, A. Inhibition of the electron transport chain
B. Peroxidation of membrane lipids, protein oxidation, and DNA strand breaks
C. Activation of the coagulation cascade
D. Depletion of intracellular potassium
E. Stimulation of lysosomal biogenesis
✓ Correct Answer: B. Peroxidation of membrane lipids, protein oxidation, and
DNA strand breaks
EXPERT RATIONALE: Reactive oxygen species (ROS) cause cellular injury by lipid
peroxidation (disrupting membranes), oxidizing proteins (altering enzyme function),
and breaking DNA strands. Antioxidants like superoxide dismutase, catalase, and
glutathione normally neutralize these effects.
QUESTION 7. A 65-year-old patient undergoes reperfusion therapy after a 2-
hour coronary occlusion. Post-reperfusion, the cardiomyocytes show
paradoxical worsening of injury. This phenomenon is attributed to:
A. Continued ischemia from microvascular occlusion only
B. Massive release of reactive oxygen species upon oxygen reintroduction
C. Activation of complement cascade exclusively
D. Hypoglycemia-induced mitochondrial failure
E. Re-occlusion of the coronary artery
✓ Correct Answer: B. Massive release of reactive oxygen species upon oxygen
reintroduction
EXPERT RATIONALE: Ischemia-reperfusion injury occurs when restoration of blood
flow generates a burst of ROS from dysfunctional mitochondria and activated
neutrophils. These free radicals cause membrane damage, mitochondrial
permeability transition pore opening, and paradoxical cell death.
Version 1 | Regis University Questions &
Verified Answers with Expert Rationales
• NU606 Advanced Pathophysiology Exam 1 – Regis University | 200 Questions,
Verified Answers & Expert EXPERT RATIONALE. This document covers all major
exam topics with five-option MCQs, bolded correct answers, and detailed EXPERT
RATIONALEs to reinforce understanding.
• How to study: Attempt each question independently before reading the correct
answer, then study the EXPERT RATIONALE deeply — focus on the "why" behind
each answer to master the pathophysiological concepts tested at the graduate
level.
QUESTION 1. A patient develops cell swelling and vacuolation following a
period of ischemia. Which mechanism is primarily responsible for this
finding?
A. Activation of apoptotic caspases
B. Increased lysosomal membrane permeability
C. Failure of the Na⁺/K⁺-ATPase pump due to ATP depletion
D. Enhanced mitochondrial biogenesis
E. Upregulation of oxidative phosphorylation
✓ Correct Answer: C. Failure of the Na⁺/K⁺-ATPase pump due to ATP depletion
EXPERT RATIONALE: Ischemia depletes ATP, impairing the Na⁺/K⁺-ATPase pump.
Sodium and water accumulate intracellularly, causing hydropic (cellular) swelling —
the earliest morphological sign of reversible cell injury.
QUESTION 2. Which type of cell death is characterized by chromatin
condensation, cell shrinkage, membrane blebbing, and formation of apoptotic
bodies without inflammation?
, A. Coagulative necrosis
B. Liquefactive necrosis
C. Pyroptosis
D. Apoptosis
E. Caseous necrosis
✓ Correct Answer: D. Apoptosis
EXPERT RATIONALE: Apoptosis is programmed cell death characterized by cell
shrinkage, chromatin condensation, membrane blebbing, and apoptotic body
formation. It does not trigger an inflammatory response because cell contents are
neatly packaged and phagocytosed.
QUESTION 3. A patient with chronic hypertension develops left ventricular
wall thickening without chamber dilation. This is an example of which cellular
adaptation?
A. Hyperplasia
B. Metaplasia
C. Atrophy
D. Dysplasia
E. Hypertrophy
✓ Correct Answer: E. Hypertrophy
EXPERT RATIONALE: Hypertrophy is an increase in cell size in response to
increased workload. Cardiac myocytes cannot divide, so they enlarge (hypertrophy)
in response to chronic pressure overload from hypertension, resulting in concentric
left ventricular hypertrophy.
QUESTION 4. A chronic smoker develops columnar-to-squamous epithelial
change in the bronchial lining. This is best described as:
, A. Dysplasia
B. Anaplasia
C. Metaplasia
D. Hyperplasia
E. Neoplasia
✓ Correct Answer: C. Metaplasia
EXPERT RATIONALE: Metaplasia is the reversible replacement of one differentiated
cell type with another. Chronic irritation from smoking causes bronchial
pseudostratified columnar epithelium to be replaced by stratified squamous
epithelium — a protective but potentially pre-malignant adaptation.
QUESTION 5. Which form of necrosis is most commonly seen following
myocardial infarction?
A. Liquefactive necrosis
B. Caseous necrosis
C. Fat necrosis
D. Gangrenous necrosis
E. Coagulative necrosis
✓ Correct Answer: E. Coagulative necrosis
EXPERT RATIONALE: Coagulative necrosis results from ischemia in solid organs.
The tissue architecture is preserved ("ghost cells") because denatured proteins
resist proteolysis. This is the hallmark of MI, renal infarction, and most solid organ
infarcts.
QUESTION 6. Free radical injury contributes to cell damage through which
primary mechanism?
, A. Inhibition of the electron transport chain
B. Peroxidation of membrane lipids, protein oxidation, and DNA strand breaks
C. Activation of the coagulation cascade
D. Depletion of intracellular potassium
E. Stimulation of lysosomal biogenesis
✓ Correct Answer: B. Peroxidation of membrane lipids, protein oxidation, and
DNA strand breaks
EXPERT RATIONALE: Reactive oxygen species (ROS) cause cellular injury by lipid
peroxidation (disrupting membranes), oxidizing proteins (altering enzyme function),
and breaking DNA strands. Antioxidants like superoxide dismutase, catalase, and
glutathione normally neutralize these effects.
QUESTION 7. A 65-year-old patient undergoes reperfusion therapy after a 2-
hour coronary occlusion. Post-reperfusion, the cardiomyocytes show
paradoxical worsening of injury. This phenomenon is attributed to:
A. Continued ischemia from microvascular occlusion only
B. Massive release of reactive oxygen species upon oxygen reintroduction
C. Activation of complement cascade exclusively
D. Hypoglycemia-induced mitochondrial failure
E. Re-occlusion of the coronary artery
✓ Correct Answer: B. Massive release of reactive oxygen species upon oxygen
reintroduction
EXPERT RATIONALE: Ischemia-reperfusion injury occurs when restoration of blood
flow generates a burst of ROS from dysfunctional mitochondria and activated
neutrophils. These free radicals cause membrane damage, mitochondrial
permeability transition pore opening, and paradoxical cell death.
