Respiratory System: Mucus and Cilia Function
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Questions and Answers

What is the primary function of the mucus lining the respiratory passageways?

  • To trap small particles out of the inspired air (correct)
  • To humidify the inspired air
  • To warm the inspired air
  • To increase the surface area of the alveoli

    • What is the function of the cilia in the respiratory passages?

  • To absorb oxygen from the inspired air
  • To humidify the inspired air
  • To move mucus and entrapped particles toward the pharynx (correct)
  • To trap small particles out of the inspired air

    • What is the direction of the 'power stroke' of the cilia in the lungs?

  • Toward the pharynx (correct)
  • Toward the trachea
  • Toward the alveoli
  • Toward the bronchioles

    • What is the approximate rate at which the cilia beat?

    <p>10-20 times per second</p> Signup and view all the answers

    What is the purpose of the cough reflex?

    <p>To expel foreign matter from the respiratory passages</p> Signup and view all the answers

    What type of epithelium lines the respiratory passages?

    <p>Ciliated epithelium</p> Signup and view all the answers

    What is the primary pathway for afferent nerve impulses from the respiratory passages?

    <p>Through the vagus nerves to the medulla</p> Signup and view all the answers

    What is the effect of the sudden opening of the vocal cords and epiglottis during a cough?

    <p>Air under high pressure in the lungs explodes outward</p> Signup and view all the answers

    What is the purpose of the sneeze reflex?

    <p>To clear the nasal passages of foreign matter</p> Signup and view all the answers

    During a cough, what happens to the non-cartilaginous parts of the bronchi and trachea?

    <p>They invaginate inward, causing collapse</p> Signup and view all the answers

    What is the approximate volume of air that is rapidly inspired during a cough?

    <p>Up to 2.5 liters</p> Signup and view all the answers

    What is the likely velocity of air expelled during a sneeze?

    <p>Up to 75 miles per hour</p> Signup and view all the answers

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