How does the mitochondria affect gas exchance/respiratory system?

As mitochondria convert O2 to water the intracellular O2 tension decreases, thereby generating a gradient for O2 diffusion into the cell from the extracellular space. Mitochondria are the principal site of oxygen consumption in the cell, so their oxygen tension is lower than that of any other organelle.

is this for the e2020 class

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.