Beginner Alveoli Quiz

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This quiz contains 10 questions. Click below to begin.

Q1. What is the main function of alveoli in the lungs?

  • Producing sound
  • Secreting mucus
  • Filtering dust
  • Gas exchange

Q2. What type of blood vessel surrounds the alveoli?

  • Capillaries
  • Arteries
  • Veins
  • Lymphatics

Q3. What gas do alveoli take in from inhaled air?

  • Oxygen
  • Helium
  • Nitrogen
  • Carbon dioxide

Q4. What gas is removed from the blood into the alveoli?

  • Nitrogen
  • Hydrogen
  • Carbon dioxide
  • Oxygen

Q5. What is the shape of an alveolus?

  • Tube
  • Flat plate
  • Balloon-like sac
  • Pyramid

Q6. Which cell type lines the alveoli and facilitates gas exchange?

  • Goblet cells
  • Type II pneumocytes
  • Type I pneumocytes
  • Ciliated epithelial cells

Q7. What substance reduces surface tension in alveoli?

  • Bile
  • Mucus
  • Surfactant
  • Water

Q8. Which cell in alveoli produces surfactant?

  • Alveolar macrophages
  • Type II pneumocytes
  • Basal cells
  • Type I pneumocytes

Q9. Why are alveoli so numerous in the lungs?

  • To cool air
  • To produce sound
  • To filter bacteria
  • To increase surface area for gas exchange

Q10. What keeps alveoli from collapsing during exhalation?

  • Nerve signals
  • Muscle contractions
  • Surfactant and residual air
  • Blood pressure
Disclaimer: The content on this site is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.