You didn't really provide us with a list or a set of possible answers, however, generally it's very importnat that we have a good and advanced respiratory fitness as this will allow us to go up a flight of stairs faster and without getting out of breath, we are able to run for longer or just do different physical exercises for longer. When our respiratory fitness is weak, this isn't possible.
In the respiratory membrane, the compensation activity that takes is the elimination of CO₂ to adjust bicarbonate to carbonic acid it to its normal ratio of 20 : 1 by increase respiratory rate.
