Cell swelling MCQs With Answer designed for B. Pharm students provides a focused, exam-oriented review of cellular edema, osmotic imbalance, and pharmacological interventions. This concise introduction covers mechanisms such as Na+/K+‑ATPase failure, ionic influx, aquaporin channels, regulatory volume decrease (RVD), and clinical correlates like cerebral edema and renal swelling. Ideal for pharmacology and pathophysiology revision, these high-yield MCQs emphasize drug effects (mannitol, hypertonic saline), diagnostic markers, and laboratory assays relevant to B. Pharm curricula. The content is simple, evidence-focused, and keyword-rich to boost learning and SEO visibility for students preparing for exams. Now let’s test your knowledge with 50 MCQs on this topic.
Q1. Which primary mechanism causes acute cell swelling in ischemic tissue?
- Activation of Na+/K+‑ATPase
- Failure of Na+/K+‑ATPase
- Enhanced mitochondrial oxidative phosphorylation
- Increased protein synthesis
Correct Answer: Failure of Na+/K+‑ATPase
Q2. Cell swelling due to hypoosmotic extracellular fluid is primarily explained by:
- Increased extracellular oncotic pressure
- Water influx down osmotic gradient
- Active transport of water
- Decreased intracellular solute concentration
Correct Answer: Water influx down osmotic gradient
Q3. Which channel family mainly facilitates rapid water movement into swollen cells?
- Voltage-gated sodium channels
- Aquaporins
- Sodium-glucose cotransporters
- Claudins
Correct Answer: Aquaporins
Q4. Regulatory volume decrease (RVD) in cells primarily involves efflux of:
- Sodium and water only
- Potassium and chloride ions
- Calcium and magnesium ions
- Proteins and nucleic acids
Correct Answer: Potassium and chloride ions
Q5. Which pharmacological agent is commonly used to reduce intracranial pressure by creating an osmotic gradient?
- Mannitol
- Atropine
- Insulin
Correct Answer: Mannitol
Q6. Cell swelling that reverses with restoration of ATP is termed:
- Necrosis
- Apoptosis
- Reversible hydropic change
- Autophagy
Correct Answer: Reversible hydropic change
Q7. Which ion accumulation inside the cell is most directly responsible for osmotic water influx during swelling?
- Chloride
- Potassium
- Sodium
- Calcium
Correct Answer: Sodium
Q8. Which laboratory finding supports intracellular edema in hepatocytes?
- Increased serum albumin
- Swollen pale hepatocytes on histology
- Decreased serum transaminases
- Reduced hepatic glycogen
Correct Answer: Swollen pale hepatocytes on histology
Q9. Which condition is most associated with cytotoxic brain edema?
- Hyponatremia due to SIADH
- Ischemic stroke
- Hypoalbuminemia
- Increased venous pressure
Correct Answer: Ischemic stroke
Q10. Inhibition of which enzyme directly causes intracellular sodium accumulation?
- Na+/K+‑ATPase
- Carbonic anhydrase
- Adenylate cyclase
- ATP synthase
Correct Answer: Na+/K+‑ATPase
Q11. Which drug can exacerbate cellular swelling by inhibiting Na+/K+‑ATPase?
- Digoxin
- ACE inhibitors
- Beta blockers
- Loop diuretics
Correct Answer: Digoxin
Q12. Which electrolyte disturbance commonly causes cell swelling in neurons?
- Hypernatremia
- Hyponatremia
- Hyperkalemia
- Hypercalcemia
Correct Answer: Hyponatremia
Q13. Which of the following best distinguishes cytotoxic from vasogenic edema?
- Presence of blood-brain barrier disruption in vasogenic edema
- Increased intracellular water in vasogenic edema
- Vasogenic edema results from ATP depletion
- Cytotoxic edema is due to increased capillary permeability
Correct Answer: Presence of blood-brain barrier disruption in vasogenic edema
Q14. Which imaging feature on CT suggests cerebral edema with mass effect?
- Enlarged ventricles without shift
- Midline shift and sulcal effacement
- Isolated lacunar infarcts
- Calcified lesions
Correct Answer: Midline shift and sulcal effacement
Q15. Which experimental assay measures cell swelling by changes in light scattering?
- Flow cytometry forward scatter
- Western blot densitometry
- ELISA optical density
- Mass spectrometry
Correct Answer: Flow cytometry forward scatter
Q16. Which transport process is upregulated during RVD to remove intracellular osmolytes?
- Na+/H+ exchange
- Cl−/HCO3− antiport
- Organic osmolyte efflux (e.g., taurine)
- Glucose uptake
Correct Answer: Organic osmolyte efflux (e.g., taurine)
Q17. Which molecular event often follows severe, prolonged cell swelling leading to cell death?
- Stabilization of lysosomal membranes
- Mitochondrial membrane permeabilization
- Enhanced DNA repair
- Decreased intracellular calcium
Correct Answer: Mitochondrial membrane permeabilization
Q18. Which organ is particularly vulnerable to osmotic demyelination when serum sodium is corrected too rapidly?
- Liver
- Pons (central pontine myelinolysis)
- Kidney cortex
- Gastrointestinal mucosa
Correct Answer: Pons (central pontine myelinolysis)
Q19. Hyperglycemia can cause cellular dehydration rather than swelling because:
- Glucose does not affect osmolarity
- High extracellular glucose increases osmolarity pulling water out of cells
- Glucose increases Na+/K+‑ATPase activity
- Insulin causes cell swelling instead
Correct Answer: High extracellular glucose increases osmolarity pulling water out of cells
Q20. Which intracellular ion increase signals activation of degradative enzymes during injury?
- Calcium
- Potassium
- Sodium
- Magnesium
Correct Answer: Calcium
Q21. Which condition is most likely to produce hydronephrosis and secondary tubular cell swelling?
- Obstructive uropathy
- Primary glomerulonephritis
- Dehydration
- Hyperthyroidism
Correct Answer: Obstructive uropathy
Q22. Which protein family regulates volume-sensitive chloride channels important in RVD?
- ANO/TMEM16 family
- Integrins
- Cadherins
- Collagens
Correct Answer: ANO/TMEM16 family
Q23. Which diuretic may be used adjunctively with osmotic therapy to lower intracranial pressure?
- Hydrochlorothiazide
- Spironolactone
- Furosemide
- Amiloride
Correct Answer: Furosemide
Q24. Excessive intracellular accumulation of which substance can draw water into cells causing swelling in hepatocytes?
- Glycogen
- Cholesterol
- Lipofuscin
- Keratin
Correct Answer: Glycogen
Q25. Which measurement indicates increased cell volume in cultured cells?
- Decreased forward scatter on flow cytometry
- Increased forward scatter on flow cytometry
- Lower protein content per cell
- Reduced cell diameter
Correct Answer: Increased forward scatter on flow cytometry
Q26. Which of these is a complication of mannitol therapy if used excessively?
- Hypernatremia and dehydration
- Hyponatremia and cellular swelling
- Hypoglycemia
- Excessive anticoagulation
Correct Answer: Hypernatremia and dehydration
Q27. Which cellular structure commonly shows vacuolar swelling in reversible cell injury?
- Endoplasmic reticulum
- Lysosomal membrane
- Nuclear envelope
- Golgi apparatus
Correct Answer: Endoplasmic reticulum
Q28. In the context of cell swelling, the term “hydropic change” refers to:
- Protein-rich extracellular fluid accumulation
- Intracellular accumulation of watery fluid
- Fat accumulation within cells
- Calcification of tissues
Correct Answer: Intracellular accumulation of watery fluid
Q29. Which transporter helps extrude sodium during cell volume regulation and is energy-dependent?
- Na+/K+‑ATPase
- Voltage-gated potassium channel
- Cl− channel
- Facilitated glucose transporter
Correct Answer: Na+/K+‑ATPase
Q30. Which signaling molecule often increases during hypoxic injury leading to altered ion channel function?
- cAMP
- Reactive oxygen species (ROS)
- Insulin
- Epinephrine
Correct Answer: Reactive oxygen species (ROS)
Q31. An effective strategy to prevent osmotic demyelination is to:
- Rapidly raise serum sodium
- Correct chronic hyponatremia slowly
- Use hypertonic saline without monitoring
- Avoid any sodium replacement
Correct Answer: Correct chronic hyponatremia slowly
Q32. Which cell type demonstrates the most dramatic swelling in acute hypoxic injury?
- Neurons
- Fibroblasts
- Adipocytes
- Erythrocytes
Correct Answer: Neurons
Q33. Which lab parameter increases when cells lyse from severe swelling and necrosis?
- Serum albumin
- Serum transaminases (AST/ALT)
- PTH levels
- Haptoglobin
Correct Answer: Serum transaminases (AST/ALT)
Q34. Which pharmacologic approach can reduce vasogenic cerebral edema by stabilizing endothelial junctions?
- Corticosteroids
- Beta blockers
- Anticholinergics
- Calcium channel blockers
Correct Answer: Corticosteroids
Q35. Which experimental manipulation will most likely induce swelling in cultured cells?
- Adding isotonic medium
- Switching to hypoosmotic medium
- Increasing external potassium
- Decreasing incubation temperature slightly
Correct Answer: Switching to hypoosmotic medium
Q36. Which molecule acts as an organic osmolyte released during RVD?
- Taurine
- Collagen
- Hemoglobin
- Insulin
Correct Answer: Taurine
Q37. Which imaging modality is most sensitive for detecting early cerebral edema?
- Plain X‑ray
- CT scan without contrast
- MRI with diffusion-weighted imaging
- Ultrasound
Correct Answer: MRI with diffusion-weighted imaging
Q38. Which statement about intracellular sodium during swelling is true?
- It decreases because sodium is pumped out
- It increases due to impaired extrusion and membrane leak
- It remains constant
- It is irrelevant to osmotic balance
Correct Answer: It increases due to impaired extrusion and membrane leak
Q39. Which clinical sign suggests increased intracranial pressure from brain swelling?
- Bradycardia, hypertension, and irregular respiration (Cushing triad)
- Hypotension and tachycardia only
- Decreased respiratory effort without blood pressure changes
- Peripheral edema only
Correct Answer: Bradycardia, hypertension, and irregular respiration (Cushing triad)
Q40. Which ion channel blockade would impede RVD and worsen cell swelling?
- Volume-regulated anion channel (VRAC) blocker
- Sodium channel opener
- Calcium pump activator
- Potassium channel opener
Correct Answer: Volume-regulated anion channel (VRAC) blocker
Q41. Which cellular compartment most immediately accumulates water during swelling?
- Extracellular matrix
- Cytosol
- Mitochondrial matrix exclusively
- Intercellular junctions
Correct Answer: Cytosol
Q42. Which laboratory method can quantify intracellular ion concentrations during swelling studies?
- Atomic absorption spectroscopy
- Light microscopy only
- Routine urine dipstick
- Gram staining
Correct Answer: Atomic absorption spectroscopy
Q43. Which metabolic inhibitor is commonly used experimentally to induce swelling by depleting ATP?
- Oligomycin
- Glucose
- Adenosine
- Vitamin C
Correct Answer: Oligomycin
Q44. Which pathology is characterized by both intracellular swelling and extracellular fluid accumulation?
- Pure cytotoxic edema only
- Combined cytotoxic and vasogenic edema in severe stroke
- Dehydration
- Osteoporosis
Correct Answer: Combined cytotoxic and vasogenic edema in severe stroke
Q45. Which drug increases serum osmolarity to pull water out of swollen brain cells?
- Mannitol
- Propranolol
- Digoxin
- Metformin
Correct Answer: Mannitol
Q46. Which experimental readout indicates failure of volume regulatory mechanisms?
- Rapid recovery of cell volume after hypoosmotic shock
- Persistent increased cell volume after hypoosmotic challenge
- Normal ion fluxes
- Stable membrane potential
Correct Answer: Persistent increased cell volume after hypoosmotic challenge
Q47. Which factor contributes to water entry during ischemia aside from ionic imbalance?
- ATP generation increases
- Membrane lipid peroxidation increases permeability
- Protein synthesis increases
- Extracellular osmolality rises
Correct Answer: Membrane lipid peroxidation increases permeability
Q48. Which therapeutic approach can be used to reduce cell swelling by modifying ion transport?
- Use of ion channel modulators to restore ion gradients
- Suppression of protein translation
- Administration of growth factors only
- Increasing dietary fat
Correct Answer: Use of ion channel modulators to restore ion gradients
Q49. Which histochemical stain helps visualize swollen cells with pale cytoplasm?
- Periodic acid–Schiff (PAS) for glycogen
- Silver stain for neurons exclusively
- Gram stain for bacteria
- Oil Red O for calcium
Correct Answer: Periodic acid–Schiff (PAS) for glycogen
Q50. For B. Pharm students, understanding cell swelling is important because it informs:
- Only basic chemistry concepts
- Drug effects, toxicology, clinical management, and pathophysiology
- Architectural design of laboratories
- Medical billing procedures
Correct Answer: Drug effects, toxicology, clinical management, and pathophysiology
