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Author Question: Surfactant facilitates alveolar distention and ventilation by: a. decreasing thoracic compliance. ... (Read 97 times)

armygirl

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on: Jun 25, 2018
Surfactant facilitates alveolar distention and ventilation by:
 
  a. decreasing thoracic compliance.
  b. attracting water to the alveolar surface.
  c. decreasing surface tension in alveoli.
  d. increasing diffusion in alveoli.

Question 2

The pressure required to inflate an alveolus is inversely related to:
 
  a. wall thickness.
  b. surface tension.
  c. minute volume.
  d. alveolar radius.


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ecox1012

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Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: C
Surfactant decreases surface tension in alveoli, allowing the lungs to inflate. Surfactant does not decrease thoracic compliance, attract water, or increase diffusion.

Answer to Question 2

ANS: D
The radius of the alveoli is inversely related to the pressure required to inflate it. The pressure re-quired is not associated with wall thickness, surface tension, or minute volume.


armygirl

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Reply 2 on: Jun 25, 2018
Excellent

xiaomengxian

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Reply 3 on: Yesterday
Wow, this really help

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