Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: Chloride ions are important in neutralizing positive ion charges in the body. If chloride is lost, the body uses bicarbonate ions in place of the lost chloride ions. Thus, lost chloride results in an increased reabsorption of bicarbonate by the renal system. Answer: increased bicarbonate reabsorption
A:
Why does the body react to a loss of chloride ions?