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Card 12 / 14:
Describe the control of blood carbonic acid levels through the respiratory system.
Carbonic acid blood levels are controlled through the respiratory system by the expulsion of CO 2 from the lungs. The formula for the production of bicarbonate ions is reversible if the concentration of CO 2 decreases. As this happens in the lungs, carbonic acid is converted into a gas, and the concentration of the acid decreases. The rate of respiration determines the amount of CO 2 exhaled. If the rate increases, less acid is in the blood; if the rate decreases, the blood can become more acidic.
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