As the amount of O2 that dissolves in the plasma increases, what ...

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As the amount of O2 that dissolves in the plasma increases, what is it directly proportional to?
 
  a. Its partial pressure
  b. Its solubility coefficient
  c. Minute ventilation
  d. Temperature

Question 2

During normal inspiration, which of the following occurs?
 
  a. Alveoli at the apexes expand less than those at the bases.
  b. Alveoli at the apexes expand more than those at the bases.
  c. Alveoli at the bases and apexes expand almost equally.
  d. Alveoli at the bases expand less than those at the apexes.

[cici]

Answer to Question 1

ANS: A
The relationship between partial pressure and dissolved O2 is direct and linear. By applying Hen-ry's law, the amount of dissolved O2 in the blood (at 37 C) can be computed with the following simple formula:
Dissolved oxygen (ml/dl) = PO2  0.003.

Answer to Question 2

ANS: A
Like perfusion, ventilation also is increased in the lung bases, with approximately four times as much ventilation going to the bases than to the apexes of the upright lung.

[2125004343]

Thank you

[cici]

Happy to help you