The partial pressure of oxygen in air inside alveoli is 14 kPa.
The partial pressure of oxygen in pulmonary capillaries is 6 kPa.
What will be the effect of these partial pressures on diffusion?
1 )
Carbon dioxide will not diffuse in any direction.
Oxygen will diffuse from alveoli into capillaries.
3 )
Oxygen will diffuse from capillaries into alveoli.
4 )
Oxygen will diffuse equally in both directions.
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