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HESI RN ADVANCED PATHOPHYSIOLOGY EXAM 2026/2027 |
Actual Exam 160 Questions with Correct Detailed Answers |
Already Graded A+ | Pass Guaranteed
Section 1: Cellular Adaptation, Injury & Neoplasia (Questions 1-20)
Q1. A 68-year-old male presents with acute chest pain and is diagnosed with an ST-
elevation myocardial infarction. Within the first 20 minutes of coronary occlusion, the
cardiac myocytes demonstrate cellular swelling and mitochondrial vacuolization.
Which cellular process best describes these early changes?
A. Apoptosis with caspase activation and cell shrinkage
B. Irreversible injury with karyolysis and membrane rupture
C. Reversible injury due to ATP depletion and Na+/K+ pump failure [CORRECT]
D. Metaplasia with replacement by fibroblasts
Rationale: In reversible injury, ATP depletion causes Na+/K+ pump failure, leading
to cellular swelling and mitochondrial dysfunction without membrane rupture.
Apoptosis involves programmed cell shrinkage, not swelling; irreversible injury would
show karyolysis and membrane disruption; metaplasia is an adaptive change, not
acute ischemic injury.
Correct Answer: C
Q2. A 45-year-old woman undergoes thrombolytic therapy for acute ischemic stroke.
Reperfusion occurs after 4 hours of occlusion. Which mechanism primarily mediates
the additional cellular damage observed upon restoration of blood flow?
A. Lysosomal enzyme release causing autophagy
B. Free radical generation via xanthine oxidase and neutrophil NADPH oxidase
[CORRECT]
C. Excessive calcium efflux through damaged channels
D. Direct glucose toxicity from hyperglycemia
,2
Rationale: Reperfusion injury is driven by free radical production through xanthine
oxidase conversion and neutrophil respiratory burst (NADPH oxidase), causing lipid
peroxidation and DNA damage. Lysosomal enzymes mediate autophagy but are not
the primary reperfusion mechanism; calcium influx, not efflux, causes damage;
glucose toxicity is unrelated to reperfusion pathophysiology.
Correct Answer: B
Q3. During prolonged cellular hypoxia, calcium influx activates phospholipases and
proteases, accelerating membrane degradation. What is the primary mechanism
driving this pathological calcium accumulation?
A. Increased Na+/Ca2+ exchanger activity due to ATP depletion [CORRECT]
B. Upregulation of voltage-gated calcium channels
C. Enhanced sarcoplasmic reticulum calcium reuptake
D. Increased parathyroid hormone secretion
Rationale: ATP depletion impairs the Na+/K+ pump, causing intracellular Na+
accumulation that drives the Na+/Ca2+ exchanger to operate in reverse, flooding the
cytosol with Ca2+. Voltage-gated channels are not the primary mechanism in
hypoxia; sarcoplasmic reticulum reuptake requires ATP and is impaired; PTH
regulates systemic calcium, not intracellular ischemic accumulation.
Correct Answer: A
Q4. A patient in hemorrhagic shock develops widespread cellular dysfunction. Which
metabolic consequence of ATP depletion directly causes the accumulation of lactic
acid in tissues?
A. Inhibition of the citric acid cycle at the succinate dehydrogenase step
B. Shift to anaerobic glycolysis due to lack of oxidative phosphorylation [CORRECT]
C. Activation of gluconeogenesis in hepatocytes
D. Increased fatty acid beta-oxidation
,3
Rationale: Without oxygen, mitochondria cannot perform oxidative phosphorylation,
forcing cells to rely on anaerobic glycolysis, which generates lactate from pyruvate.
The citric acid cycle is inhibited at multiple steps but lactic acid accumulation
specifically stems from anaerobic glycolysis; gluconeogenesis consumes lactate
rather than producing it; beta-oxidation requires oxygen and is impaired.
Correct Answer: B
Q5. A liver biopsy from a patient with viral hepatitis shows single-cell necrosis with
cell shrinkage, chromatin condensation, and formation of apoptotic bodies. Which
process is being demonstrated?
A. Coagulative necrosis with preserved tissue architecture
B. Liquefactive necrosis with enzymatic digestion
C. Apoptosis via intrinsic and extrinsic caspase pathways [CORRECT]
D. Fat necrosis with saponification
Rationale: Apoptosis is characterized by cell shrinkage, chromatin condensation, and
apoptotic body formation without inflammation, mediated by caspase cascades.
Coagulative necrosis preserves architecture but involves cell swelling and denatured
proteins; liquefactive necrosis involves enzymatic digestion typical of brain abscesses;
fat necrosis occurs in adipose tissue with calcium saponification.
Correct Answer: C
Q6. A 55-year-old smoker is found to have stratified squamous epithelium in the
bronchial lining, replacing the normal pseudostratified columnar epithelium. This
change represents which adaptive cellular response?
A. Dysplasia with disordered maturation
B. Hyperplasia with increased cell number
C. Metaplasia with replacement by a different cell type [CORRECT]
D. Hypertrophy with increased cell size
, 4
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by
another, as seen in respiratory epithelium adapting to chronic irritation. Dysplasia
involves disordered maturation and is pre-neoplastic; hyperplasia increases cell
number of the same type; hypertrophy increases cell size, not type conversion.
Correct Answer: C
Q7. A cervical Pap smear reveals disordered epithelial maturation, nuclear
hyperchromatosis, and loss of polarity extending through the full thickness of the
epithelium. Which term best describes these findings?
A. Metaplasia with reversible columnar-to-squamous change
B. Hyperplasia with increased cell proliferation
C. Carcinoma in situ with basement membrane invasion
D. Severe dysplasia (CIN 3) with full-thickness disordered maturation [CORRECT]
Rationale: Full-thickness disordered maturation without basement membrane
invasion defines severe dysplasia/carcinoma in situ (CIN 3). Metaplasia is reversible
and orderly; hyperplasia maintains normal maturation; invasion across the basement
membrane would classify as invasive carcinoma, not in situ.
Correct Answer: D
Q8. A bodybuilder's skeletal muscle cells increase in cross-sectional area with
preserved nuclei. A pregnant woman's uterine myocytes increase in number. These
represent which cellular adaptations?
A. Both are examples of hyperplasia
B. Hypertrophy in the bodybuilder; hyperplasia in the pregnant uterus [CORRECT]
C. Hypertrophy in both examples
D. Metaplasia in the bodybuilder; dysplasia in the uterus
Rationale: Skeletal muscle is a permanent cell type that undergoes hypertrophy
(increased cell size), while uterine smooth muscle undergoes hyperplasia (increased
cell number) during pregnancy. Neither involves metaplasia or dysplasia; both are
HESI RN ADVANCED PATHOPHYSIOLOGY EXAM 2026/2027 |
Actual Exam 160 Questions with Correct Detailed Answers |
Already Graded A+ | Pass Guaranteed
Section 1: Cellular Adaptation, Injury & Neoplasia (Questions 1-20)
Q1. A 68-year-old male presents with acute chest pain and is diagnosed with an ST-
elevation myocardial infarction. Within the first 20 minutes of coronary occlusion, the
cardiac myocytes demonstrate cellular swelling and mitochondrial vacuolization.
Which cellular process best describes these early changes?
A. Apoptosis with caspase activation and cell shrinkage
B. Irreversible injury with karyolysis and membrane rupture
C. Reversible injury due to ATP depletion and Na+/K+ pump failure [CORRECT]
D. Metaplasia with replacement by fibroblasts
Rationale: In reversible injury, ATP depletion causes Na+/K+ pump failure, leading
to cellular swelling and mitochondrial dysfunction without membrane rupture.
Apoptosis involves programmed cell shrinkage, not swelling; irreversible injury would
show karyolysis and membrane disruption; metaplasia is an adaptive change, not
acute ischemic injury.
Correct Answer: C
Q2. A 45-year-old woman undergoes thrombolytic therapy for acute ischemic stroke.
Reperfusion occurs after 4 hours of occlusion. Which mechanism primarily mediates
the additional cellular damage observed upon restoration of blood flow?
A. Lysosomal enzyme release causing autophagy
B. Free radical generation via xanthine oxidase and neutrophil NADPH oxidase
[CORRECT]
C. Excessive calcium efflux through damaged channels
D. Direct glucose toxicity from hyperglycemia
,2
Rationale: Reperfusion injury is driven by free radical production through xanthine
oxidase conversion and neutrophil respiratory burst (NADPH oxidase), causing lipid
peroxidation and DNA damage. Lysosomal enzymes mediate autophagy but are not
the primary reperfusion mechanism; calcium influx, not efflux, causes damage;
glucose toxicity is unrelated to reperfusion pathophysiology.
Correct Answer: B
Q3. During prolonged cellular hypoxia, calcium influx activates phospholipases and
proteases, accelerating membrane degradation. What is the primary mechanism
driving this pathological calcium accumulation?
A. Increased Na+/Ca2+ exchanger activity due to ATP depletion [CORRECT]
B. Upregulation of voltage-gated calcium channels
C. Enhanced sarcoplasmic reticulum calcium reuptake
D. Increased parathyroid hormone secretion
Rationale: ATP depletion impairs the Na+/K+ pump, causing intracellular Na+
accumulation that drives the Na+/Ca2+ exchanger to operate in reverse, flooding the
cytosol with Ca2+. Voltage-gated channels are not the primary mechanism in
hypoxia; sarcoplasmic reticulum reuptake requires ATP and is impaired; PTH
regulates systemic calcium, not intracellular ischemic accumulation.
Correct Answer: A
Q4. A patient in hemorrhagic shock develops widespread cellular dysfunction. Which
metabolic consequence of ATP depletion directly causes the accumulation of lactic
acid in tissues?
A. Inhibition of the citric acid cycle at the succinate dehydrogenase step
B. Shift to anaerobic glycolysis due to lack of oxidative phosphorylation [CORRECT]
C. Activation of gluconeogenesis in hepatocytes
D. Increased fatty acid beta-oxidation
,3
Rationale: Without oxygen, mitochondria cannot perform oxidative phosphorylation,
forcing cells to rely on anaerobic glycolysis, which generates lactate from pyruvate.
The citric acid cycle is inhibited at multiple steps but lactic acid accumulation
specifically stems from anaerobic glycolysis; gluconeogenesis consumes lactate
rather than producing it; beta-oxidation requires oxygen and is impaired.
Correct Answer: B
Q5. A liver biopsy from a patient with viral hepatitis shows single-cell necrosis with
cell shrinkage, chromatin condensation, and formation of apoptotic bodies. Which
process is being demonstrated?
A. Coagulative necrosis with preserved tissue architecture
B. Liquefactive necrosis with enzymatic digestion
C. Apoptosis via intrinsic and extrinsic caspase pathways [CORRECT]
D. Fat necrosis with saponification
Rationale: Apoptosis is characterized by cell shrinkage, chromatin condensation, and
apoptotic body formation without inflammation, mediated by caspase cascades.
Coagulative necrosis preserves architecture but involves cell swelling and denatured
proteins; liquefactive necrosis involves enzymatic digestion typical of brain abscesses;
fat necrosis occurs in adipose tissue with calcium saponification.
Correct Answer: C
Q6. A 55-year-old smoker is found to have stratified squamous epithelium in the
bronchial lining, replacing the normal pseudostratified columnar epithelium. This
change represents which adaptive cellular response?
A. Dysplasia with disordered maturation
B. Hyperplasia with increased cell number
C. Metaplasia with replacement by a different cell type [CORRECT]
D. Hypertrophy with increased cell size
, 4
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by
another, as seen in respiratory epithelium adapting to chronic irritation. Dysplasia
involves disordered maturation and is pre-neoplastic; hyperplasia increases cell
number of the same type; hypertrophy increases cell size, not type conversion.
Correct Answer: C
Q7. A cervical Pap smear reveals disordered epithelial maturation, nuclear
hyperchromatosis, and loss of polarity extending through the full thickness of the
epithelium. Which term best describes these findings?
A. Metaplasia with reversible columnar-to-squamous change
B. Hyperplasia with increased cell proliferation
C. Carcinoma in situ with basement membrane invasion
D. Severe dysplasia (CIN 3) with full-thickness disordered maturation [CORRECT]
Rationale: Full-thickness disordered maturation without basement membrane
invasion defines severe dysplasia/carcinoma in situ (CIN 3). Metaplasia is reversible
and orderly; hyperplasia maintains normal maturation; invasion across the basement
membrane would classify as invasive carcinoma, not in situ.
Correct Answer: D
Q8. A bodybuilder's skeletal muscle cells increase in cross-sectional area with
preserved nuclei. A pregnant woman's uterine myocytes increase in number. These
represent which cellular adaptations?
A. Both are examples of hyperplasia
B. Hypertrophy in the bodybuilder; hyperplasia in the pregnant uterus [CORRECT]
C. Hypertrophy in both examples
D. Metaplasia in the bodybuilder; dysplasia in the uterus
Rationale: Skeletal muscle is a permanent cell type that undergoes hypertrophy
(increased cell size), while uterine smooth muscle undergoes hyperplasia (increased
cell number) during pregnancy. Neither involves metaplasia or dysplasia; both are
