What is the ideal ratio of bicarbonate (HCO3-) to carbonic acid (H2CO3) required to maintain blood pH at 7.4?
Explanation
The normal blood pH of 7.4 is maintained when the ratio of bicarbonate ions (HCO3-) to carbonic acid (H2CO3) is approximately 20:1. This balance is crucial for the body's acid-base homeostasis.