Final answer:
The body compensates for respiratory acidosis by having the kidneys retain bicarbonate ions, which help to neutralize excess hydrogen ions and restore pH balance.
Step-by-step explanation:
In response to a chest injury leading to impaired breathing and respiratory acidosis, Jane's body would try to compensate for this imbalance through the kidneys. The proper compensation mechanism would involve the kidneys retaining bicarbonate ions (HCO3-). This process occurs because bicarbonate can neutralize excess hydrogen ions (H+), which are contributing to acidosis, and help to restore the blood pH balance. The renal cells also excrete H+ through proton pumps into the forming urine, thus reducing the acidity in the blood. However, kidneys do not eliminate carbon dioxide directly; that is the role of the lungs.