Portage Pathophysiology: Modules 1–10
Comprehensive Exam (2026/2027) Questions
and Verified Answers with Rationales, 100%
Guarantee Pass
Module 1: Cellular Biology & Adaptation
Q1. A cell adapts to increased workload by enlarging. This process is called:
A) Hyperplasia
B) Atrophy
C) Hypertrophy
D) Metaplasia
✓ Correct Answer: C – Hypertrophy
Rationale: Hypertrophy is an increase in individual cell size, often in response to
increased demand (e.g., cardiac myocytes in hypertension). Hyperplasia =
increased cell number; atrophy = decreased size; metaplasia = one cell type
replaces another.
Q2. Which cellular change is reversible?
A) Necrosis
B) Apoptosis
C) Fatty change (steatosis)
D) Malignant transformation
✓ Correct Answer: C – Fatty change
Rationale: Fatty change (lipid accumulation in liver or heart) is reversible upon
removal of the injurious agent (e.g., alcohol abstinence). Necrosis and apoptosis
are cell death; malignant transformation is permanent.
Q3. Which of the following is characteristic of irreversible cell injury?
A) Plasma membrane blebbing
B) Nuclear pyknosis
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,C) Increased ATP production
D) Normal mitochondrial function
✓ Correct Answer: B – Nuclear pyknosis
Rationale: Pyknosis (nuclear condensation), karyorrhexis (fragmentation), and
karyolysis (dissolution) indicate irreversible injury. Membrane blebbing may be
reversible early on.
Module 2: Inflammation & Immunity
Q4. The first vascular change in acute inflammation is:
A) Increased vascular permeability
B) Vasodilation
C) Leukocyte emigration
D) Chemotaxis
✓ Correct Answer: B – Vasodilation
Rationale: Vasodilation occurs first (mediated by histamine and nitric oxide),
increasing blood flow (rubor, calor). Increased permeability follows, then
leukocyte emigration and chemotaxis.
Q5. Which cytokine is primarily responsible for fever in systemic inflammation?
A) Interleukin-10
B) Interleukin-1
C) Interferon-gamma
D) TGF-beta
✓ Correct Answer: B – Interleukin-1
Rationale: IL-1, TNF-α, and IL-6 act on the hypothalamus to produce prostaglandin
E2, raising the thermostatic set point. IL-10 is anti-inflammatory.
Q6. A patient with recurrent bacterial infections has a defect in phagosome-
lysosome fusion. This most likely affects which cell type?
A) B lymphocytes
B) T lymphocytes
C) Neutrophils
D) Eosinophils
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,✓ Correct Answer: C – Neutrophils
Rationale: Neutrophils phagocytose bacteria and require phagosome-lysosome
fusion for killing. Defects (e.g., Chediak-Higashi) cause recurrent pyogenic
infections.
Q7. Chronic inflammation is characterized by the presence of:
A) Neutrophils
B) Macrophages and lymphocytes
C) Eosinophils
D) Basophils
✓ Correct Answer: B – Macrophages and lymphocytes
Rationale: Chronic inflammation features mononuclear cells (macrophages,
lymphocytes, plasma cells), fibroblasts, and neovascularization. Neutrophils
dominate acute inflammation.
Module 3: Fluid, Electrolyte, & Acid-Base Balance
Q8. A patient with prolonged vomiting develops metabolic alkalosis. Which
compensatory mechanism occurs?
A) Hypoventilation to increase PaCO2
B) Hyperventilation to decrease PaCO2
C) Increased renal bicarbonate excretion
D) Decreased renal hydrogen excretion
✓ Correct Answer: A – Hypoventilation to increase PaCO2
Rationale: Metabolic alkalosis is compensated by hypoventilation (retaining CO2)
to normalize pH. This is limited by hypoxemia drive.
Q9. Which laboratory finding is consistent with syndrome of inappropriate
antidiuretic hormone (SIADH)?
A) High serum sodium, high urine osmolality
B) Low serum sodium, high urine osmolality
C) Low serum sodium, low urine osmolality
D) High serum sodium, low urine osmolality
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, ✓ Correct Answer: B – Low serum sodium, high urine osmolality
Rationale: SIADH causes water retention (dilutional hyponatremia) with
inappropriately concentrated urine (>100 mOsm/kg). Urine sodium is usually >20
mEq/L.
Q10. A 65-year-old with heart failure presents with fatigue, anorexia, and serum
sodium 118 mEq/L. He is on furosemide and lisinopril. Most likely cause?
A) Hypervolemic hyponatremia
B) Hypovolemic hyponatremia
C) Psychogenic polydipsia
D) Adrenal insufficiency
✓ Correct Answer: A – Hypervolemic hyponatremia
Rationale: Heart failure causes hypervolemic hyponatremia (total body Na+
increased but more water retention). Thiazides/furosemide can worsen it. Eu-
/hypervolemic hyponatremia is the key distinction.
Module 4: Genetics & Neoplasia
Q11. A tumor suppressor gene requires which type of mutation to contribute to
carcinogenesis?
A) One allele mutation (dominant negative)
B) Both alleles mutated (loss of heterozygosity)
C) Amplification of the gene
D) Translocation activating the gene
✓ Correct Answer: B – Both alleles mutated
Rationale: Tumor suppressors (Rb, p53, BRCA) follow Knudson's two-hit
hypothesis. Both alleles must be inactivated. Oncogenes require only one
activating mutation.
Q12. Which characteristic is unique to malignant tumors?
A) Mitotic figures
B) Nuclear pleomorphism
C) Invasion and metastasis
D) Rapid growth
4|Page
Comprehensive Exam (2026/2027) Questions
and Verified Answers with Rationales, 100%
Guarantee Pass
Module 1: Cellular Biology & Adaptation
Q1. A cell adapts to increased workload by enlarging. This process is called:
A) Hyperplasia
B) Atrophy
C) Hypertrophy
D) Metaplasia
✓ Correct Answer: C – Hypertrophy
Rationale: Hypertrophy is an increase in individual cell size, often in response to
increased demand (e.g., cardiac myocytes in hypertension). Hyperplasia =
increased cell number; atrophy = decreased size; metaplasia = one cell type
replaces another.
Q2. Which cellular change is reversible?
A) Necrosis
B) Apoptosis
C) Fatty change (steatosis)
D) Malignant transformation
✓ Correct Answer: C – Fatty change
Rationale: Fatty change (lipid accumulation in liver or heart) is reversible upon
removal of the injurious agent (e.g., alcohol abstinence). Necrosis and apoptosis
are cell death; malignant transformation is permanent.
Q3. Which of the following is characteristic of irreversible cell injury?
A) Plasma membrane blebbing
B) Nuclear pyknosis
1|Page
,C) Increased ATP production
D) Normal mitochondrial function
✓ Correct Answer: B – Nuclear pyknosis
Rationale: Pyknosis (nuclear condensation), karyorrhexis (fragmentation), and
karyolysis (dissolution) indicate irreversible injury. Membrane blebbing may be
reversible early on.
Module 2: Inflammation & Immunity
Q4. The first vascular change in acute inflammation is:
A) Increased vascular permeability
B) Vasodilation
C) Leukocyte emigration
D) Chemotaxis
✓ Correct Answer: B – Vasodilation
Rationale: Vasodilation occurs first (mediated by histamine and nitric oxide),
increasing blood flow (rubor, calor). Increased permeability follows, then
leukocyte emigration and chemotaxis.
Q5. Which cytokine is primarily responsible for fever in systemic inflammation?
A) Interleukin-10
B) Interleukin-1
C) Interferon-gamma
D) TGF-beta
✓ Correct Answer: B – Interleukin-1
Rationale: IL-1, TNF-α, and IL-6 act on the hypothalamus to produce prostaglandin
E2, raising the thermostatic set point. IL-10 is anti-inflammatory.
Q6. A patient with recurrent bacterial infections has a defect in phagosome-
lysosome fusion. This most likely affects which cell type?
A) B lymphocytes
B) T lymphocytes
C) Neutrophils
D) Eosinophils
2|Page
,✓ Correct Answer: C – Neutrophils
Rationale: Neutrophils phagocytose bacteria and require phagosome-lysosome
fusion for killing. Defects (e.g., Chediak-Higashi) cause recurrent pyogenic
infections.
Q7. Chronic inflammation is characterized by the presence of:
A) Neutrophils
B) Macrophages and lymphocytes
C) Eosinophils
D) Basophils
✓ Correct Answer: B – Macrophages and lymphocytes
Rationale: Chronic inflammation features mononuclear cells (macrophages,
lymphocytes, plasma cells), fibroblasts, and neovascularization. Neutrophils
dominate acute inflammation.
Module 3: Fluid, Electrolyte, & Acid-Base Balance
Q8. A patient with prolonged vomiting develops metabolic alkalosis. Which
compensatory mechanism occurs?
A) Hypoventilation to increase PaCO2
B) Hyperventilation to decrease PaCO2
C) Increased renal bicarbonate excretion
D) Decreased renal hydrogen excretion
✓ Correct Answer: A – Hypoventilation to increase PaCO2
Rationale: Metabolic alkalosis is compensated by hypoventilation (retaining CO2)
to normalize pH. This is limited by hypoxemia drive.
Q9. Which laboratory finding is consistent with syndrome of inappropriate
antidiuretic hormone (SIADH)?
A) High serum sodium, high urine osmolality
B) Low serum sodium, high urine osmolality
C) Low serum sodium, low urine osmolality
D) High serum sodium, low urine osmolality
3|Page
, ✓ Correct Answer: B – Low serum sodium, high urine osmolality
Rationale: SIADH causes water retention (dilutional hyponatremia) with
inappropriately concentrated urine (>100 mOsm/kg). Urine sodium is usually >20
mEq/L.
Q10. A 65-year-old with heart failure presents with fatigue, anorexia, and serum
sodium 118 mEq/L. He is on furosemide and lisinopril. Most likely cause?
A) Hypervolemic hyponatremia
B) Hypovolemic hyponatremia
C) Psychogenic polydipsia
D) Adrenal insufficiency
✓ Correct Answer: A – Hypervolemic hyponatremia
Rationale: Heart failure causes hypervolemic hyponatremia (total body Na+
increased but more water retention). Thiazides/furosemide can worsen it. Eu-
/hypervolemic hyponatremia is the key distinction.
Module 4: Genetics & Neoplasia
Q11. A tumor suppressor gene requires which type of mutation to contribute to
carcinogenesis?
A) One allele mutation (dominant negative)
B) Both alleles mutated (loss of heterozygosity)
C) Amplification of the gene
D) Translocation activating the gene
✓ Correct Answer: B – Both alleles mutated
Rationale: Tumor suppressors (Rb, p53, BRCA) follow Knudson's two-hit
hypothesis. Both alleles must be inactivated. Oncogenes require only one
activating mutation.
Q12. Which characteristic is unique to malignant tumors?
A) Mitotic figures
B) Nuclear pleomorphism
C) Invasion and metastasis
D) Rapid growth
4|Page
