Page 1 of 87
APPLIED PATHOPHYSIOLOGY 2026 EXAM LATEST VERSION
QUESTIONS AND ANSWERS 2026 – 2027 EDITION
APPLIED PATHOPHYSIOLOGY EXAM
250 Multiple Choice Questions with Rationales
SECTION 1: CELLULAR ADAPTATION & INJURY (Questions 1-25)
1. A 65-year-old male with chronic alcoholism presents with liver enlargement due
to accumulation of fat within hepatocytes. Which cellular adaptation best
describes this pathological process?
• A) Hyperplasia
• B) Metaplasia
• C) Atrophy
• D) Fatty change (steatosis)
Rationale: Fatty change (steatosis) is a reversible cellular adaptation where lipids
accumulate in the cytoplasm of cells, commonly affecting the liver in chronic
alcoholics due to impaired fatty acid metabolism and increased triglyceride synthesis.
2. When cardiac muscle cells are subjected to prolonged increased workload such
as hypertension, they increase in size without increasing in number. What is the
correct term for this adaptive response?
• A) Hyperplasia
• B) Hypertrophy
• C) Dysplasia
• D) Anaplasia
Rationale: Hypertrophy refers to an increase in cell size leading to organ enlargement,
which occurs in cardiac muscle cells responding to increased workload since these
cells cannot divide and undergo hyperplasia.
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3. A pathologist examining tissue from a patient with chronic cigarette smoking
observes that the normal ciliated pseudostratified columnar epithelium of the
bronchi has been replaced by stratified squamous epithelium. Which cellular
adaptation has occurred?
• A) Hyperplasia
• B) Hypertrophy
• C) Metaplasia
• D) Dysplasia
Rationale: Metaplasia is a reversible change where one differentiated cell type is
replaced by another cell type better suited to withstand environmental stress, such as
the replacement of respiratory epithelium by squamous epithelium in chronic smokers.
4. Following complete obstruction of the renal artery, kidney cells undergo cell
death characterized by swelling, rupture of membranes, and an inflammatory
response. Which type of cell death is occurring?
• A) Apoptosis
• B) Necrosis
• C) Autophagy
• D) Pyroptosis
Rationale: Necrosis is unprogrammed cell death resulting from severe injury or
ischemia, characterized by cellular swelling, membrane rupture, and inflammation due
to the release of cellular contents into surrounding tissues.
5. A 48-year-old female with estrogen-dependent breast cancer receives
chemotherapy that triggers programmed cell death in malignant cells without
causing inflammation. Which mechanism of cell death is being induced by this
treatment?
• A) Coagulative necrosis
• B) Caseous necrosis
• C) Apoptosis
• D) Gangrenous necrosis
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Rationale: Apoptosis is programmed cell death characterized by cell shrinkage,
chromatin condensation, and formation of apoptotic bodies that are phagocytosed
without eliciting an inflammatory response, making it the desired mechanism for cancer
treatment.
6. Following a myocardial infarction, the dead cardiac muscle tissue appears firm
and pale on gross examination with preservation of tissue architecture
microscopically. Which type of necrosis is typically observed in this scenario?
• A) Liquefactive necrosis
• B) Coagulative necrosis
• C) Caseous necrosis
• D) Fat necrosis
Rationale: Coagulative necrosis is the characteristic pattern of cell death in ischemic
tissues except the brain, where proteins are denatured and tissue architecture is
preserved for several days before being removed by inflammatory cells.
7. A patient with tuberculosis develops granulomas in their lungs that appear as
cheese-like material on gross examination. Which type of necrosis is characteristic
of this infectious process?
• A) Coagulative necrosis
• B) Liquefactive necrosis
• C) Caseous necrosis
• D) Gangrenous necrosis
Rationale: Caseous necrosis is a distinctive form of necrosis seen in tuberculosis and
some fungal infections, where dead tissue appears white, friable, and cheese-like due
to the combination of coagulative and liquefactive necrosis with granuloma formation.
8. A 55-year-old diabetic patient develops a non-healing ulcer on the great toe that
appears black and dry with a clear line of demarcation. Which type of necrosis is
most consistent with this clinical presentation?
• A) Dry gangrene
• B) Wet gangrene
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• C) Gas gangrene
• D) Fat necrosis
Rationale: Dry gangrene is a form of coagulative necrosis typically occurring in the
extremities of diabetic or atherosclerotic patients, characterized by dry, shrunken, black
tissue with a clear line of demarcation due to slow progressive ischemia.
9. Following acute pancreatitis, a patient develops areas of fat necrosis in the
abdominal cavity where lipases have broken down triglycerides into fatty acids that
combine with calcium. What is the clinical significance of this calcium binding?
• A) Hypercalcemia
• B) Hypocalcemia
• C) Hyperphosphatemia
• D) Hypokalemia
Rationale: Fat necrosis causes hypocalcemia because released fatty acids bind with
calcium ions to form insoluble calcium soaps, reducing serum calcium levels and
potentially leading to tetany or cardiac arrhythmias.
10. A 72-year-old patient with severe atherosclerosis develops an infarct in the
brain that undergoes softening and liquefaction over time. Which type of necrosis
is characteristically associated with cerebral infarction?
• A) Coagulative necrosis
• B) Liquefactive necrosis
• C) Caseous necrosis
• D) Fibrinoid necrosis
Rationale: Liquefactive necrosis occurs in the brain following ischemic injury because
neural tissue has abundant lipids and little connective tissue, causing the tissue to
become liquid and form a cystic space as necrotic cells are digested by phagocytes.
11. A newborn infant with severe hypoxia develops cell injury characterized by
swelling of mitochondria, loss of microvilli, and formation of membrane blebs.
Which cellular structure is primarily responsible for maintaining ion homeostasis
during this injury?
APPLIED PATHOPHYSIOLOGY 2026 EXAM LATEST VERSION
QUESTIONS AND ANSWERS 2026 – 2027 EDITION
APPLIED PATHOPHYSIOLOGY EXAM
250 Multiple Choice Questions with Rationales
SECTION 1: CELLULAR ADAPTATION & INJURY (Questions 1-25)
1. A 65-year-old male with chronic alcoholism presents with liver enlargement due
to accumulation of fat within hepatocytes. Which cellular adaptation best
describes this pathological process?
• A) Hyperplasia
• B) Metaplasia
• C) Atrophy
• D) Fatty change (steatosis)
Rationale: Fatty change (steatosis) is a reversible cellular adaptation where lipids
accumulate in the cytoplasm of cells, commonly affecting the liver in chronic
alcoholics due to impaired fatty acid metabolism and increased triglyceride synthesis.
2. When cardiac muscle cells are subjected to prolonged increased workload such
as hypertension, they increase in size without increasing in number. What is the
correct term for this adaptive response?
• A) Hyperplasia
• B) Hypertrophy
• C) Dysplasia
• D) Anaplasia
Rationale: Hypertrophy refers to an increase in cell size leading to organ enlargement,
which occurs in cardiac muscle cells responding to increased workload since these
cells cannot divide and undergo hyperplasia.
, Page 2 of 87
3. A pathologist examining tissue from a patient with chronic cigarette smoking
observes that the normal ciliated pseudostratified columnar epithelium of the
bronchi has been replaced by stratified squamous epithelium. Which cellular
adaptation has occurred?
• A) Hyperplasia
• B) Hypertrophy
• C) Metaplasia
• D) Dysplasia
Rationale: Metaplasia is a reversible change where one differentiated cell type is
replaced by another cell type better suited to withstand environmental stress, such as
the replacement of respiratory epithelium by squamous epithelium in chronic smokers.
4. Following complete obstruction of the renal artery, kidney cells undergo cell
death characterized by swelling, rupture of membranes, and an inflammatory
response. Which type of cell death is occurring?
• A) Apoptosis
• B) Necrosis
• C) Autophagy
• D) Pyroptosis
Rationale: Necrosis is unprogrammed cell death resulting from severe injury or
ischemia, characterized by cellular swelling, membrane rupture, and inflammation due
to the release of cellular contents into surrounding tissues.
5. A 48-year-old female with estrogen-dependent breast cancer receives
chemotherapy that triggers programmed cell death in malignant cells without
causing inflammation. Which mechanism of cell death is being induced by this
treatment?
• A) Coagulative necrosis
• B) Caseous necrosis
• C) Apoptosis
• D) Gangrenous necrosis
, Page 3 of 87
Rationale: Apoptosis is programmed cell death characterized by cell shrinkage,
chromatin condensation, and formation of apoptotic bodies that are phagocytosed
without eliciting an inflammatory response, making it the desired mechanism for cancer
treatment.
6. Following a myocardial infarction, the dead cardiac muscle tissue appears firm
and pale on gross examination with preservation of tissue architecture
microscopically. Which type of necrosis is typically observed in this scenario?
• A) Liquefactive necrosis
• B) Coagulative necrosis
• C) Caseous necrosis
• D) Fat necrosis
Rationale: Coagulative necrosis is the characteristic pattern of cell death in ischemic
tissues except the brain, where proteins are denatured and tissue architecture is
preserved for several days before being removed by inflammatory cells.
7. A patient with tuberculosis develops granulomas in their lungs that appear as
cheese-like material on gross examination. Which type of necrosis is characteristic
of this infectious process?
• A) Coagulative necrosis
• B) Liquefactive necrosis
• C) Caseous necrosis
• D) Gangrenous necrosis
Rationale: Caseous necrosis is a distinctive form of necrosis seen in tuberculosis and
some fungal infections, where dead tissue appears white, friable, and cheese-like due
to the combination of coagulative and liquefactive necrosis with granuloma formation.
8. A 55-year-old diabetic patient develops a non-healing ulcer on the great toe that
appears black and dry with a clear line of demarcation. Which type of necrosis is
most consistent with this clinical presentation?
• A) Dry gangrene
• B) Wet gangrene
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• C) Gas gangrene
• D) Fat necrosis
Rationale: Dry gangrene is a form of coagulative necrosis typically occurring in the
extremities of diabetic or atherosclerotic patients, characterized by dry, shrunken, black
tissue with a clear line of demarcation due to slow progressive ischemia.
9. Following acute pancreatitis, a patient develops areas of fat necrosis in the
abdominal cavity where lipases have broken down triglycerides into fatty acids that
combine with calcium. What is the clinical significance of this calcium binding?
• A) Hypercalcemia
• B) Hypocalcemia
• C) Hyperphosphatemia
• D) Hypokalemia
Rationale: Fat necrosis causes hypocalcemia because released fatty acids bind with
calcium ions to form insoluble calcium soaps, reducing serum calcium levels and
potentially leading to tetany or cardiac arrhythmias.
10. A 72-year-old patient with severe atherosclerosis develops an infarct in the
brain that undergoes softening and liquefaction over time. Which type of necrosis
is characteristically associated with cerebral infarction?
• A) Coagulative necrosis
• B) Liquefactive necrosis
• C) Caseous necrosis
• D) Fibrinoid necrosis
Rationale: Liquefactive necrosis occurs in the brain following ischemic injury because
neural tissue has abundant lipids and little connective tissue, causing the tissue to
become liquid and form a cystic space as necrotic cells are digested by phagocytes.
11. A newborn infant with severe hypoxia develops cell injury characterized by
swelling of mitochondria, loss of microvilli, and formation of membrane blebs.
Which cellular structure is primarily responsible for maintaining ion homeostasis
during this injury?
