Final answer:
In respiratory acidosis, the kidneys increase bicarbonate conservation and H+ secretion to restore the balance. In respiratory alkalosis, the kidneys decrease bicarbonate production and reabsorb H+ to lower the pH.
Step-by-step explanation:
In respiratory acidosis, the kidneys respond by increasing the conservation of bicarbonate and the secretion of H+ ions. This helps to increase the concentration of bicarbonate in the blood and restore the proper balance of bicarbonate and carbonic acid. The increase in bicarbonate helps to raise the blood pH back to a normal range. On the other hand, in respiratory alkalosis, the kidneys decrease the production of bicarbonate and reabsorb H+ ions from the tubular fluid to help lower the pH to the normal range.