PORTAGE LEARNING NURS 231 FINAL EXAM
2026/2027 | Pathophysiology Comprehensive Final |
Modules 1-10 | Verified Answers | Pass Guaranteed -
A+ Graded
SECTION 1: CELLULAR BIOLOGY, GENETICS & CANCER (25
Questions)
Q1: A 68-year-old male with a 40-pack-year smoking history presents with progressive
dyspnea and weight loss. Chest CT reveals a 4 cm hilar mass with mediastinal
lymphadenopathy. Biopsy demonstrates sheets of small, round blue cells with scant
cytoplasm, high nuclear-to-cytoplasmic ratio, and positive staining for cytokeratin and
thyroid transcription factor-1 (TTF-1). Which cellular adaptation process most likely
preceded the malignant transformation in the bronchial epithelium?
A. Hypertrophy of ciliated columnar cells
B. Squamous metaplasia of respiratory epithelium
C. Hyperplasia of goblet cells
D. Atrophy of alveolar macrophages
B. Squamous metaplasia of respiratory epithelium [CORRECT]
Correct Answer: B
Rationale: Chronic cigarette smoke exposure causes squamous metaplasia
(replacement of normal ciliated pseudostratified columnar epithelium with squamous
epithelium), which is a reversible cellular adaptation that increases cancer
susceptibility. This metaplastic change represents a pre-neoplastic lesion that can
progress through dysplasia to carcinoma. Hypertrophy (A) and hyperplasia (C) are
adaptive responses but not the classic pre-malignant change in smokers. Atrophy (D) is
incorrect as smoke causes inflammatory hyperplasia, not atrophy.
,Q2: A 45-year-old woman with poorly controlled hypertension develops left ventricular
wall thickening on echocardiography. The cardiologist explains this is an adaptive
response to increased afterload. Which cellular process best describes this finding?
A. Hyperplasia of cardiac myocytes
B. Hypertrophy of cardiac myocytes
C. Metaplasia of endocardial cells
D. Dysplasia of coronary endothelium
B. Hypertrophy of cardiac myocytes [CORRECT]
Correct Answer: B
Rationale: Cardiac myocytes are permanent cells that cannot undergo hyperplasia; they
respond to increased workload through hypertrophy (increase in cell size), not
hyperplasia (increase in cell number). Left ventricular hypertrophy in hypertension
represents a compensatory increase in myocyte size to overcome elevated systemic
vascular resistance. Metaplasia (C) and dysplasia (D) are not characteristic responses
to hemodynamic stress.
Q3: A 72-year-old male with peripheral arterial disease develops dry gangrene of the
distal toes. The affected tissue appears black, shrunken, and well-demarcated from
surrounding viable tissue. Which pathophysiological mechanism best explains this type
of necrosis?
A. Liquefactive necrosis due to enzymatic digestion
B. Coagulative necrosis with tissue preservation
C. Caseous necrosis with granulomatous inflammation
D. Fat necrosis with saponification
B. Coagulative necrosis with tissue preservation [CORRECT]
Correct Answer: B
Rationale: Dry gangrene results from ischemic coagulative necrosis where tissue
architecture is preserved by denatured proteins, creating a dry, shrunken, black eschar.
The slow onset in peripheral arterial disease allows time for tissue desiccation.
Liquefactive necrosis (A) occurs in brain infarcts and bacterial infections. Caseous
,necrosis (C) is characteristic of tuberculosis. Fat necrosis (D) occurs in pancreatic or
breast trauma.
Q4: A 28-year-old woman presents with acute right upper quadrant pain after a motor
vehicle accident. CT reveals a lacerated liver with areas of hemorrhagic fat necrosis.
Laboratory studies show elevated serum amylase and lipase. Which enzyme is primarily
responsible for the fat necrosis observed?
A. Pancreatic amylase
B. Pancreatic lipase
C. Trypsin
D. Elastase
B. Pancreatic lipase [CORRECT]
Correct Answer: B
Rationale: Fat necrosis is caused by lipase-mediated hydrolysis of triglycerides into fatty
acids, which combine with calcium to form insoluble soaps (saponification), creating
chalky white deposits. While amylase (A) digests carbohydrates and trypsin (C) digests
proteins, lipase specifically targets adipose tissue. Elastase (D) degrades elastic fibers
in vessel walls, contributing to hemorrhage but not fat necrosis.
Q5: A 55-year-old male with chronic alcoholism develops hepatic encephalopathy. Liver
biopsy shows hepatocyte swelling with cytoplasmic clearing and vacuolization. Which
cellular injury mechanism is most responsible for these histological findings?
A. Hydropic change due to impaired Na+/K+-ATPase
B. Fatty change due to impaired lipoprotein export
C. Hyaline change due to cytokeratin accumulation
D. Pigment change due to iron overload
A. Hydropic change due to impaired Na+/K+-ATPase [CORRECT]
Correct Answer: A
Rationale: Hydropic (vacuolar) degeneration results from ATP depletion causing failure
of the Na+/K+-ATPase pump, leading to intracellular water accumulation and cellular
swelling. This is a reversible form of cell injury seen in early ischemia and toxic insults.
, Fatty change (B) also occurs in alcoholism but presents as macrovesicular steatosis,
not cytoplasmic clearing. Hyaline change (C) refers to Mallory bodies, and pigment
change (D) refers to hemosiderin or lipofuscin.
Q6: A 3-year-old boy presents with failure to thrive, hepatosplenomegaly, and
developmental delay. Bone marrow biopsy shows lipid-laden macrophages with
wrinkled tissue paper cytoplasm. Genetic testing reveals a deficiency in
glucocerebrosidase. This disorder represents which pattern of genetic inheritance?
A. Autosomal dominant
B. Autosomal recessive
C. X-linked dominant
D. X-linked recessive
B. Autosomal recessive [CORRECT]
Correct Answer: B
Rationale: Gaucher disease, caused by glucocerebrosidase deficiency, is an autosomal
recessive lysosomal storage disorder. Both parents must be carriers for the child to be
affected. Autosomal dominant disorders (A) require only one mutated allele. X-linked
patterns (C, D) show sex-specific inheritance patterns not described here. The tissue
paper macrophages are pathognomonic for Gaucher disease.
Q7: A 19-year-old college student develops painless cervical lymphadenopathy, night
sweats, and pruritus. Excisional biopsy reveals Reed-Sternberg cells (large binucleated
cells with prominent owl-eye nucleoli) in a mixed inflammatory background. Which
paraneoplastic syndrome is most commonly associated with this malignancy?
A. Syndrome of inappropriate antidiuretic hormone (SIADH)
B. Hypercalcemia of malignancy
C. Erythrocytosis
D. Cushing syndrome
A. Syndrome of inappropriate antidiuretic hormone (SIADH) [CORRECT]
Correct Answer: A
2026/2027 | Pathophysiology Comprehensive Final |
Modules 1-10 | Verified Answers | Pass Guaranteed -
A+ Graded
SECTION 1: CELLULAR BIOLOGY, GENETICS & CANCER (25
Questions)
Q1: A 68-year-old male with a 40-pack-year smoking history presents with progressive
dyspnea and weight loss. Chest CT reveals a 4 cm hilar mass with mediastinal
lymphadenopathy. Biopsy demonstrates sheets of small, round blue cells with scant
cytoplasm, high nuclear-to-cytoplasmic ratio, and positive staining for cytokeratin and
thyroid transcription factor-1 (TTF-1). Which cellular adaptation process most likely
preceded the malignant transformation in the bronchial epithelium?
A. Hypertrophy of ciliated columnar cells
B. Squamous metaplasia of respiratory epithelium
C. Hyperplasia of goblet cells
D. Atrophy of alveolar macrophages
B. Squamous metaplasia of respiratory epithelium [CORRECT]
Correct Answer: B
Rationale: Chronic cigarette smoke exposure causes squamous metaplasia
(replacement of normal ciliated pseudostratified columnar epithelium with squamous
epithelium), which is a reversible cellular adaptation that increases cancer
susceptibility. This metaplastic change represents a pre-neoplastic lesion that can
progress through dysplasia to carcinoma. Hypertrophy (A) and hyperplasia (C) are
adaptive responses but not the classic pre-malignant change in smokers. Atrophy (D) is
incorrect as smoke causes inflammatory hyperplasia, not atrophy.
,Q2: A 45-year-old woman with poorly controlled hypertension develops left ventricular
wall thickening on echocardiography. The cardiologist explains this is an adaptive
response to increased afterload. Which cellular process best describes this finding?
A. Hyperplasia of cardiac myocytes
B. Hypertrophy of cardiac myocytes
C. Metaplasia of endocardial cells
D. Dysplasia of coronary endothelium
B. Hypertrophy of cardiac myocytes [CORRECT]
Correct Answer: B
Rationale: Cardiac myocytes are permanent cells that cannot undergo hyperplasia; they
respond to increased workload through hypertrophy (increase in cell size), not
hyperplasia (increase in cell number). Left ventricular hypertrophy in hypertension
represents a compensatory increase in myocyte size to overcome elevated systemic
vascular resistance. Metaplasia (C) and dysplasia (D) are not characteristic responses
to hemodynamic stress.
Q3: A 72-year-old male with peripheral arterial disease develops dry gangrene of the
distal toes. The affected tissue appears black, shrunken, and well-demarcated from
surrounding viable tissue. Which pathophysiological mechanism best explains this type
of necrosis?
A. Liquefactive necrosis due to enzymatic digestion
B. Coagulative necrosis with tissue preservation
C. Caseous necrosis with granulomatous inflammation
D. Fat necrosis with saponification
B. Coagulative necrosis with tissue preservation [CORRECT]
Correct Answer: B
Rationale: Dry gangrene results from ischemic coagulative necrosis where tissue
architecture is preserved by denatured proteins, creating a dry, shrunken, black eschar.
The slow onset in peripheral arterial disease allows time for tissue desiccation.
Liquefactive necrosis (A) occurs in brain infarcts and bacterial infections. Caseous
,necrosis (C) is characteristic of tuberculosis. Fat necrosis (D) occurs in pancreatic or
breast trauma.
Q4: A 28-year-old woman presents with acute right upper quadrant pain after a motor
vehicle accident. CT reveals a lacerated liver with areas of hemorrhagic fat necrosis.
Laboratory studies show elevated serum amylase and lipase. Which enzyme is primarily
responsible for the fat necrosis observed?
A. Pancreatic amylase
B. Pancreatic lipase
C. Trypsin
D. Elastase
B. Pancreatic lipase [CORRECT]
Correct Answer: B
Rationale: Fat necrosis is caused by lipase-mediated hydrolysis of triglycerides into fatty
acids, which combine with calcium to form insoluble soaps (saponification), creating
chalky white deposits. While amylase (A) digests carbohydrates and trypsin (C) digests
proteins, lipase specifically targets adipose tissue. Elastase (D) degrades elastic fibers
in vessel walls, contributing to hemorrhage but not fat necrosis.
Q5: A 55-year-old male with chronic alcoholism develops hepatic encephalopathy. Liver
biopsy shows hepatocyte swelling with cytoplasmic clearing and vacuolization. Which
cellular injury mechanism is most responsible for these histological findings?
A. Hydropic change due to impaired Na+/K+-ATPase
B. Fatty change due to impaired lipoprotein export
C. Hyaline change due to cytokeratin accumulation
D. Pigment change due to iron overload
A. Hydropic change due to impaired Na+/K+-ATPase [CORRECT]
Correct Answer: A
Rationale: Hydropic (vacuolar) degeneration results from ATP depletion causing failure
of the Na+/K+-ATPase pump, leading to intracellular water accumulation and cellular
swelling. This is a reversible form of cell injury seen in early ischemia and toxic insults.
, Fatty change (B) also occurs in alcoholism but presents as macrovesicular steatosis,
not cytoplasmic clearing. Hyaline change (C) refers to Mallory bodies, and pigment
change (D) refers to hemosiderin or lipofuscin.
Q6: A 3-year-old boy presents with failure to thrive, hepatosplenomegaly, and
developmental delay. Bone marrow biopsy shows lipid-laden macrophages with
wrinkled tissue paper cytoplasm. Genetic testing reveals a deficiency in
glucocerebrosidase. This disorder represents which pattern of genetic inheritance?
A. Autosomal dominant
B. Autosomal recessive
C. X-linked dominant
D. X-linked recessive
B. Autosomal recessive [CORRECT]
Correct Answer: B
Rationale: Gaucher disease, caused by glucocerebrosidase deficiency, is an autosomal
recessive lysosomal storage disorder. Both parents must be carriers for the child to be
affected. Autosomal dominant disorders (A) require only one mutated allele. X-linked
patterns (C, D) show sex-specific inheritance patterns not described here. The tissue
paper macrophages are pathognomonic for Gaucher disease.
Q7: A 19-year-old college student develops painless cervical lymphadenopathy, night
sweats, and pruritus. Excisional biopsy reveals Reed-Sternberg cells (large binucleated
cells with prominent owl-eye nucleoli) in a mixed inflammatory background. Which
paraneoplastic syndrome is most commonly associated with this malignancy?
A. Syndrome of inappropriate antidiuretic hormone (SIADH)
B. Hypercalcemia of malignancy
C. Erythrocytosis
D. Cushing syndrome
A. Syndrome of inappropriate antidiuretic hormone (SIADH) [CORRECT]
Correct Answer: A
