At sea level, the partial pressure of oxygen is approximately ___ ...

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At sea level, the partial pressure of oxygen is approximately ___ (round to the nearest whole number).
 
  Fill in the blank(s) with the appropriate word(s).

Question 2

Pulmonary function tests reveal that an 80-year-old dyspneic patient has an increase in residual volume. A nurse suspects the most likely cause of the increased residual volume is _____ in lung compliance.
 
  a. an increase
  b. a decrease
  c. no change
  d. an absence

[potomatos]

Answer to Question 1

ANS:
21

At sea level, the air is made up of oxygen (20.9).

Answer to Question 2

ANS: A
The patient is experiencing an increase in lung compliance. Increased compliance indicates that the lungs or chest wall is abnormally easy to inflate and has lost some elastic recoil. Decreased compliance is seen in acute breathing disorders.

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TYSM

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