APK Exam4 Ch16

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Author:
bkheath
ID:
119985
Filename:
APK Exam4 Ch16
Updated:
2011-11-30 23:50:34
Tags:
Ventilation
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Description:
Ventilation
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  1. Exchange of gases
    Respiration
  2. What structures make up upper airways?
    Air passages of head & neck including nasal cavities, oral cavity, pharynx
  3. Connects nasal cavity to oral cavity
    pharynx
  4. Opening to the larynx which is covered by epiglottis
    Glottis
  5. Aka voicebox; air flows thru it to get to lungs
    Larynx
  6. Flap which goes over glottis during swallowing to prevent food entry into larynx
    Epiglottis
  7. Larynx is at the top of this zone; job is to move air from larynx to site of gas xchg
    Conducting zone (conducts air)
  8. Zone of gas xchg
    Respiratory zone
  9. Consists of the airways from pharynx to lungs and includes larynx, conducting zone, respiratory zone
    Respiratory tract
  10. What are the functions of the conducting zone? (2)
    • Air passageway (dead space) (primary purpose)
    • Increases air temp to level of body temp
    • Humidifies air to keep resp tract moist
  11. What are the major structures of the conducting zone?
    larynx, trachea, bronchi (1,2,3), and bronchioles (& terminal bronchioles)
  12. How does the amount of cilia change throughout the conducting zone? What about goblet cells?
    • Amt of cilia decreases as reach bronchioles
    • Goblet cells gradually decrease as move through conducting zone
  13. How does the amount of cartilage change throughout the conducting zone? Smooth muscle?
    As go farther down resp tract, amt of cartilage decreases while amt of smooth muscle increases
  14. What is the importance of smooth muscle in resp tract?
    Smooth muscle w/lack of cartilage enables them to chg their diamtere which alters resistance to air flow
  15. ___ have no cartilage so can collapse, but this is prevented by the presence of elastic fibers
    Bronchioles

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