zackcarlson3727 zackcarlson3727
  • 24-07-2017
  • Chemistry
contestada

The mechanism by which oxygen moves into capillaries from alveoli is ________.
a. active transport
b. facilitated transport
c. diffusion
d. osmosis

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yahyathejeneral
yahyathejeneral yahyathejeneral
  • 31-07-2017
The answer is c.diffusion. 
Diffusion is the movement of ions, molecules or atoms form high concentration to low concentration across the membrane without the need of any energy or any membrane gates. The oxygen enters the alveoli will be dissolved in the water vapor that is present on the wall of the alveoli and will diffuse directly to the blood across the alveolar membrane.
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