In metabolic (nonrespiratory) acidosis, what must the lungs do to bring the pH back to normal?
The pulmonary system adjust PH by adjusting the CO2 levels in the blood.In metabolic acidosis the decreased PH is reverted back by increased expelling out of CO2 from the blood.The CO2 in the blood exist as carbonic acid and removing the CO2 in turn reduce the carbonic acid content and the total acidic nature of blood will be reduced thus bringing the PH back to normal .This will be achieved by lungs with hyperventilation which leads to excessive washout of CO2 and gradual reduction in the acidosis nature of blood.It will be reflected as increased respiratory rate in the patient as a compensatory mechanism.
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