Explain how the H 2 CO 3 >HCO 3 - buffer system helps maintain blood serum at a constant pH. At which pH is the H 2 CO 3 >HCO 3 - buffer system most effective? Explain how respiration helps maintain...

Explain how the H 2 CO 3 >HCO 3 - buffer system helps maintain blood serum at a constant pH. At which pH is the H 2 CO 3 >HCO 3 - buffer system most effective? Explain how respiration helps maintain blood serum at a constant pH. In metabolic acidosis, the serum PCO2 levels can be lower than normal. Explain this form of compensation by the respiratory system.