How does the respiratory system works to re-establish the homeostasis (bring the blood pH to its normal range). Also how do the kidneys do this aswell?

Answer:
Hydrogen is a byproduct of cellular metabolism. It is transported contained by the blood by binding with HCO3 (bicarbonate) as H2CO3 (carbonic acid). This splits into H2O and CO2 by the give a hand of carbonic anhydrase. The CO2 is eliminated by the lungs. You can equate the amount of CO2 exhaled as the amount of sour exhaled. If you breathe faster and deeper, you exhale more CO2 (acid) from the blood and your pH rises. If you quit breathing, you retain CO2 (acid) and your pH falls (acidosis). Kidneys reabsorb and regenerate HCO3 but it takes >24 hrs to do so effectively. The respiratory system is much faster. You can any have a metabolic disturbance such as lactic acidosis contained by which the resipratory system will increase in rate and depth to blow past its sell-by date CO2 to attempt to bring pH in a usual range. If the lungs are the problem, such as COPD, and CO2 isn't eliminate and pH falls. The kidneys, over time, will regenerate and reabsorb more HCO3 to a level which brings the pH into a relatively commonplace range.

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