Intermediate Lung Quiz

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This quiz contains 10 questions. Click below to begin.

Q1. Which structure prevents food from entering the trachea during swallowing?

  • Epiglottis
  • Uvula
  • Glottis
  • Pharynx

Q2. Which type of epithelial tissue lines the trachea?

  • Transitional epithelium
  • Stratified squamous epithelium
  • Pseudostratified ciliated columnar epithelium
  • Simple cuboidal epithelium

Q3. What is the role of surfactant in the alveoli?

  • Reduces surface tension
  • Traps pathogens
  • Secretes mucus
  • Enhances gas diffusion

Q4. Which cells in the alveoli produce surfactant?

  • Type I pneumocytes
  • Alveolar macrophages
  • Ciliated epithelial cells
  • Type II pneumocytes

Q5. Which lung volume represents air remaining after maximal exhalation?

  • Inspiratory reserve volume
  • Vital capacity
  • Residual volume
  • Tidal volume

Q6. What is the function of the pleural fluid?

  • Reduces friction during breathing
  • Traps foreign particles
  • Filters lymph
  • Initiates cough reflex

Q7. Which branch of the nervous system causes bronchoconstriction?

  • Parasympathetic nervous system
  • Enteric nervous system
  • Sympathetic nervous system
  • Somatic motor system

Q8. Which structure forms the root of the lung?

  • Alveolar sacs
  • Bronchi, vessels, nerves, lymphatics
  • Only bronchi
  • Pleura alone

Q9. Which artery carries deoxygenated blood to the lungs?

  • Bronchial artery
  • Pulmonary artery
  • Aorta
  • Pulmonary vein

Q10. What causes air to enter the lungs during inspiration?

  • Positive pressure in lungs
  • Negative intrathoracic pressure
  • Closing of glottis
  • Contraction of alveoli
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