Pathophysiology Comprehensive Exam Review
102 Evidence-Based Practice Questions with Correct Answers and Rationales | 2026/2027
Aligned with Standard Pathophysiology Curricula, ACC/AHA, GOLD, KDIGO, ADA, ACR Guidelines, and
USMLE/NCLEX-RN/PANCE Preparation Frameworks
,Abstract
This comprehensive exam review document provides 102 evidence-based practice questions designed to
prepare health sciences students for institutional pathophysiology comprehensive examinations and
licensure readiness assessments. The questions are organized across six clinically grounded domains:
cellular and genetic foundations, inflammation and immunity with hypersensitivity reactions, fluid,
electrolyte and acid-base balance, neoplasia and cancer biology, multi-system disease processes
encompassing cardiovascular, respiratory, renal, endocrine, neurological, and gastrointestinal/hepatic
pathophysiology, and clinical correlation with diagnostic reasoning. Each question employs a mechanism-
first reasoning approach, requiring students to identify underlying pathophysiologic processes before
selecting the correct answer. Correct answers are highlighted in bold cyan, and detailed rationales reference
standard pathophysiology curricula, current clinical practice guidelines from the ACC/AHA, GOLD,
KDIGO, ADA, and ACR, and frameworks aligned with USMLE Step 1, NCLEX-RN, and PANCE
preparation. This document serves as a self-study and peer-review resource for reinforcing clinical
reasoning, disease mechanism comprehension, and integrative pathophysiology knowledge required for
advanced clinical practice.
Keywords: pathophysiology, cellular adaptation, inflammation, hypersensitivity, acid-base balance,
neoplasia, multi-system disease, clinical correlation, diagnostic reasoning
Domain Distribution Table
Domain Focus Area Questions Approx.
Weight
1: Cellular & Genetic Foundations Cell adaptation, injury, death, genetic/epigenetic Q1–Q17 17%
disorders
2: Inflammation, Immunity & Acute/chronic inflammation, innate/adaptive Q18–Q37 19%
Hypersensitivity immunity, Types I–IV hypersensitivity,
autoimmune/immunodeficiency
3: Fluid, Electrolyte & Acid-Base RAAS/ADH/ANP, fluid compartments, Q38–Q56 18%
Balance electrolyte imbalances, acid-base disorders with
compensation
4: Neoplasia & Cancer Biology Carcinogenesis, benign vs malignant, TNM Q57–Q69 12%
staging, metastasis, paraneoplastic syndromes,
tumor markers
5: Multi-System Disease Processes CV, respiratory, renal, endocrine, neurological, Q70–Q97 27%
GI/hepatic pathophysiology
6: Clinical Correlation & Diagnostic Pathophysiology-to-symptom mapping, Q98–Q102 7%
Reasoning complication prediction, mechanism-driven
differential diagnosis
Domain 1: Cellular & Genetic Foundations (Q1–Q17)
1. A patient with chronic untreated urinary tract obstruction develops shrunken, nonfunctional kidneys. Which
cellular adaptation best describes this process?
A. Hypertrophy
B. Hyperplasia
2
, C. Atrophy
D. Metaplasia
Correct Answer: C. Atrophy
Atrophy is a decrease in cell size and function due to decreased workload, inadequate blood supply, or loss of trophic
signals. In chronic obstruction, the kidney cells undergo atrophy from reduced perfusion and accumulated pressure,
resulting in reduced organ size and function. Hypertrophy is an increase in cell size, hyperplasia is an increase in cell
number, and metaplasia is a change from one mature cell type to another.
2. A weightlifter develops significantly enlarged skeletal muscles after months of resistance training. Which
cellular adaptation mechanism is primarily responsible?
A. Hyperplasia of existing myocytes
B. Hypertrophy of individual muscle fibers
C. Metaplasia to a more resilient cell type
D. Dysplasia with disorganized growth
Correct Answer: B. Hypertrophy of individual muscle fibers
Skeletal muscle hypertrophy occurs through increased synthesis of structural proteins within existing myofibers in
response to mechanical stress. Unlike cardiac or smooth muscle, mature skeletal muscle cells have limited capacity
for hyperplasia (division). Metaplasia and dysplasia are maladaptive responses and are not expected with physiologic
hypertrophy.
3. A patient with a long history of smoking develops columnar ciliated epithelium replacing the normal stratified
squamous epithelium in the trachea. This cellular change is called:
A. Hyperplasia
B. Metaplasia
C. Dysplasia
D. Anaplasia
Correct Answer: B. Metaplasia
Metaplasia is the reversible replacement of one mature cell type by another, often as an adaptive response to chronic
irritation or stress. In smokers, stratified squamous epithelium may transform to respiratory (ciliated columnar)
epithelium or vice versa. It is adaptive but predisposes to malignant transformation if the noxious stimulus persists.
Dysplasia refers to disordered cellular growth and is a precancerous change.
4. A biopsy of cervical tissue reveals abnormal cells with loss of normal maturation, nuclear pleomorphism, and
increased mitotic activity, but the basement membrane remains intact. This finding is most consistent with:
A. Metaplasia
B. Hyperplasia
C. Dysplasia
D. Carcinoma in situ with basement membrane invasion
Correct Answer: C. Dysplasia
Dysplasia is characterized by abnormal cell growth with variation in size, shape, and organization, including nuclear
pleomorphism, hyperchromasia, and increased mitotic figures. A key distinguishing feature from carcinoma is that the
basement membrane remains intact. Dysplasia is considered a precancerous lesion and is strongly associated with
persistent HPV infection in the cervix.
3
, 5. A patient presents with crushing chest pain. Laboratory tests reveal elevated cardiac troponin. Coronary
angiography shows complete occlusion of the left anterior descending artery. The myocardial cell injury in this
patient is primarily caused by:
A. Free radical–mediated injury from reperfusion
B. Ischemia leading to decreased ATP production and cellular necrosis
C. Chemical toxin–induced direct membrane damage
D. Ionizing radiation–induced DNA strand breaks
Correct Answer: B. Ischemia leading to decreased ATP production and cellular necrosis
Ischemia is the most common cause of cell injury and results from inadequate blood supply, leading to decreased
oxygen and nutrient delivery. In myocardial cells, ischemia rapidly depletes ATP, impairing Na+/K+-ATPase
function, causing cellular swelling, and ultimately leading to coagulative necrosis. While reperfusion injury involves
free radicals, the primary injury mechanism is ischemia itself.
6. A patient who ingested a large quantity of acetaminophen develops fulminant liver failure. The primary
mechanism of hepatocellular injury in acetaminophen toxicity involves:
A. Direct disruption of the mitochondrial electron transport chain
B. Generation of a reactive metabolite (NAPQI) that depletes glutathione and causes oxidative damage
C. Activation of the caspase cascade leading to programmed cell death
D. Competitive inhibition of hepatic alcohol dehydrogenase
Correct Answer: B. Generation of a reactive metabolite (NAPQI) that depletes glutathione and causes
oxidative damage
Acetaminophen is metabolized primarily by glucuronidation and sulfation, but a small fraction is converted by
CYP2E1 to NAPQI, a highly reactive electrophile. Normally, glutathione binds and detoxifies NAPQI. In overdose,
glutathione stores are depleted, and NAPQI covalently binds cellular proteins and lipids, causing centrilobular
hepatic necrosis. N-acetylcysteine (NAC) acts as a glutathione precursor and antioxidant.
7. A patient with severe peripheral vascular disease develops dry gangrene in the lower extremity. The necrosis
in this tissue is classified as:
A. Liquefactive necrosis
B. Coagulative necrosis
C. Caseous necrosis
D. Fat necrosis
Correct Answer: B. Coagulative necrosis
Coagulative necrosis is the most common form of necrosis and results from ischemia causing protein denaturation
and cell death while preserving tissue architecture. It is characteristic of infarcts in most solid organs (heart, kidney,
spleen) and dry gangrene in ischemic limbs. Liquefactive necrosis involves enzymatic degradation into liquid debris
(common in brain abscesses). Caseous necrosis has a cheese-like appearance typical of tuberculosis.
8. A patient with untreated tuberculosis develops a lung cavity with a cheese-like, granular necrotic center
surrounded by epithelioid macrophages and multinucleated giant cells. This type of necrosis is called:
A. Coagulative necrosis
B. Liquefactive necrosis
4
102 Evidence-Based Practice Questions with Correct Answers and Rationales | 2026/2027
Aligned with Standard Pathophysiology Curricula, ACC/AHA, GOLD, KDIGO, ADA, ACR Guidelines, and
USMLE/NCLEX-RN/PANCE Preparation Frameworks
,Abstract
This comprehensive exam review document provides 102 evidence-based practice questions designed to
prepare health sciences students for institutional pathophysiology comprehensive examinations and
licensure readiness assessments. The questions are organized across six clinically grounded domains:
cellular and genetic foundations, inflammation and immunity with hypersensitivity reactions, fluid,
electrolyte and acid-base balance, neoplasia and cancer biology, multi-system disease processes
encompassing cardiovascular, respiratory, renal, endocrine, neurological, and gastrointestinal/hepatic
pathophysiology, and clinical correlation with diagnostic reasoning. Each question employs a mechanism-
first reasoning approach, requiring students to identify underlying pathophysiologic processes before
selecting the correct answer. Correct answers are highlighted in bold cyan, and detailed rationales reference
standard pathophysiology curricula, current clinical practice guidelines from the ACC/AHA, GOLD,
KDIGO, ADA, and ACR, and frameworks aligned with USMLE Step 1, NCLEX-RN, and PANCE
preparation. This document serves as a self-study and peer-review resource for reinforcing clinical
reasoning, disease mechanism comprehension, and integrative pathophysiology knowledge required for
advanced clinical practice.
Keywords: pathophysiology, cellular adaptation, inflammation, hypersensitivity, acid-base balance,
neoplasia, multi-system disease, clinical correlation, diagnostic reasoning
Domain Distribution Table
Domain Focus Area Questions Approx.
Weight
1: Cellular & Genetic Foundations Cell adaptation, injury, death, genetic/epigenetic Q1–Q17 17%
disorders
2: Inflammation, Immunity & Acute/chronic inflammation, innate/adaptive Q18–Q37 19%
Hypersensitivity immunity, Types I–IV hypersensitivity,
autoimmune/immunodeficiency
3: Fluid, Electrolyte & Acid-Base RAAS/ADH/ANP, fluid compartments, Q38–Q56 18%
Balance electrolyte imbalances, acid-base disorders with
compensation
4: Neoplasia & Cancer Biology Carcinogenesis, benign vs malignant, TNM Q57–Q69 12%
staging, metastasis, paraneoplastic syndromes,
tumor markers
5: Multi-System Disease Processes CV, respiratory, renal, endocrine, neurological, Q70–Q97 27%
GI/hepatic pathophysiology
6: Clinical Correlation & Diagnostic Pathophysiology-to-symptom mapping, Q98–Q102 7%
Reasoning complication prediction, mechanism-driven
differential diagnosis
Domain 1: Cellular & Genetic Foundations (Q1–Q17)
1. A patient with chronic untreated urinary tract obstruction develops shrunken, nonfunctional kidneys. Which
cellular adaptation best describes this process?
A. Hypertrophy
B. Hyperplasia
2
, C. Atrophy
D. Metaplasia
Correct Answer: C. Atrophy
Atrophy is a decrease in cell size and function due to decreased workload, inadequate blood supply, or loss of trophic
signals. In chronic obstruction, the kidney cells undergo atrophy from reduced perfusion and accumulated pressure,
resulting in reduced organ size and function. Hypertrophy is an increase in cell size, hyperplasia is an increase in cell
number, and metaplasia is a change from one mature cell type to another.
2. A weightlifter develops significantly enlarged skeletal muscles after months of resistance training. Which
cellular adaptation mechanism is primarily responsible?
A. Hyperplasia of existing myocytes
B. Hypertrophy of individual muscle fibers
C. Metaplasia to a more resilient cell type
D. Dysplasia with disorganized growth
Correct Answer: B. Hypertrophy of individual muscle fibers
Skeletal muscle hypertrophy occurs through increased synthesis of structural proteins within existing myofibers in
response to mechanical stress. Unlike cardiac or smooth muscle, mature skeletal muscle cells have limited capacity
for hyperplasia (division). Metaplasia and dysplasia are maladaptive responses and are not expected with physiologic
hypertrophy.
3. A patient with a long history of smoking develops columnar ciliated epithelium replacing the normal stratified
squamous epithelium in the trachea. This cellular change is called:
A. Hyperplasia
B. Metaplasia
C. Dysplasia
D. Anaplasia
Correct Answer: B. Metaplasia
Metaplasia is the reversible replacement of one mature cell type by another, often as an adaptive response to chronic
irritation or stress. In smokers, stratified squamous epithelium may transform to respiratory (ciliated columnar)
epithelium or vice versa. It is adaptive but predisposes to malignant transformation if the noxious stimulus persists.
Dysplasia refers to disordered cellular growth and is a precancerous change.
4. A biopsy of cervical tissue reveals abnormal cells with loss of normal maturation, nuclear pleomorphism, and
increased mitotic activity, but the basement membrane remains intact. This finding is most consistent with:
A. Metaplasia
B. Hyperplasia
C. Dysplasia
D. Carcinoma in situ with basement membrane invasion
Correct Answer: C. Dysplasia
Dysplasia is characterized by abnormal cell growth with variation in size, shape, and organization, including nuclear
pleomorphism, hyperchromasia, and increased mitotic figures. A key distinguishing feature from carcinoma is that the
basement membrane remains intact. Dysplasia is considered a precancerous lesion and is strongly associated with
persistent HPV infection in the cervix.
3
, 5. A patient presents with crushing chest pain. Laboratory tests reveal elevated cardiac troponin. Coronary
angiography shows complete occlusion of the left anterior descending artery. The myocardial cell injury in this
patient is primarily caused by:
A. Free radical–mediated injury from reperfusion
B. Ischemia leading to decreased ATP production and cellular necrosis
C. Chemical toxin–induced direct membrane damage
D. Ionizing radiation–induced DNA strand breaks
Correct Answer: B. Ischemia leading to decreased ATP production and cellular necrosis
Ischemia is the most common cause of cell injury and results from inadequate blood supply, leading to decreased
oxygen and nutrient delivery. In myocardial cells, ischemia rapidly depletes ATP, impairing Na+/K+-ATPase
function, causing cellular swelling, and ultimately leading to coagulative necrosis. While reperfusion injury involves
free radicals, the primary injury mechanism is ischemia itself.
6. A patient who ingested a large quantity of acetaminophen develops fulminant liver failure. The primary
mechanism of hepatocellular injury in acetaminophen toxicity involves:
A. Direct disruption of the mitochondrial electron transport chain
B. Generation of a reactive metabolite (NAPQI) that depletes glutathione and causes oxidative damage
C. Activation of the caspase cascade leading to programmed cell death
D. Competitive inhibition of hepatic alcohol dehydrogenase
Correct Answer: B. Generation of a reactive metabolite (NAPQI) that depletes glutathione and causes
oxidative damage
Acetaminophen is metabolized primarily by glucuronidation and sulfation, but a small fraction is converted by
CYP2E1 to NAPQI, a highly reactive electrophile. Normally, glutathione binds and detoxifies NAPQI. In overdose,
glutathione stores are depleted, and NAPQI covalently binds cellular proteins and lipids, causing centrilobular
hepatic necrosis. N-acetylcysteine (NAC) acts as a glutathione precursor and antioxidant.
7. A patient with severe peripheral vascular disease develops dry gangrene in the lower extremity. The necrosis
in this tissue is classified as:
A. Liquefactive necrosis
B. Coagulative necrosis
C. Caseous necrosis
D. Fat necrosis
Correct Answer: B. Coagulative necrosis
Coagulative necrosis is the most common form of necrosis and results from ischemia causing protein denaturation
and cell death while preserving tissue architecture. It is characteristic of infarcts in most solid organs (heart, kidney,
spleen) and dry gangrene in ischemic limbs. Liquefactive necrosis involves enzymatic degradation into liquid debris
(common in brain abscesses). Caseous necrosis has a cheese-like appearance typical of tuberculosis.
8. A patient with untreated tuberculosis develops a lung cavity with a cheese-like, granular necrotic center
surrounded by epithelioid macrophages and multinucleated giant cells. This type of necrosis is called:
A. Coagulative necrosis
B. Liquefactive necrosis
4
