Answer
If the blood is too acidic, hydrogen ions are excreted, and the bicarbonate ions are reabsorbed. If the blood is too basic, the opposite is true—the bicarbonate ions are not reabsorbed, and the hydrogen ions are excreted.
Work Step by Step
If the blood is too acidic, hydrogen ions are excreted, and the bicarbonate ions are reabsorbed. If the blood is too basic, the opposite is true—the bicarbonate ions are not reabsorbed, and the hydrogen ions are excreted.