1.

The exchange of gases ( CO2 and ( O2 between cells takes by.

Answer»

Explanation:

diffusion

Exchange of O2 and CO2 at the ALVEOLI and TISSUES occur by diffusion. RATE of diffusion is dependent on the partial pressure gradients of O2 (pO2) and CO2 (pCO2), their solubility as well as the THICKNESS of the diffusion SURFACE.



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