Consider the equilibrium established in the carbonic acid-bicarbonate buffer system, which maintains pH balance in
mammalian blood:H2CO3
? HCO3- + H+
During hypoventilation, breathing rate decreases, and therefore elimination of CO2 during exhalation decreases. How is
optimal blood pH maintained when acid levels increase in our blood from hypoventilating?
a. excess H+ from the acid react with H2CO3 to decrease pH level
b. excess H+ from the acid react with H2CO3 to increase pH level
c. excess H+ from the acid react with H2CO3 to maintain pH level
d. excess H+ from the acid react with HCO3- to increase pH level
e. excess H+ from the acid react with HCO3- to maintain pH level
ANSWER: e
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