The other mechanism is metabolic.
- We generally concentrate on the bicarbonate
- There are two other metabolic
- They are the phosphate
buffer system and the protein buffer
- Their effect is slow,
complex and not important to this
The metabolic mechanism is actually just the
other side of the bicarbonate buffer system.
- The important value here is bicarbonate (HCO3-).
You may have noticed that it's made out of the same atoms
as CO2 and H2O.
In the kidneys, carbonic acid (H2CO3)
is changed to bicarbonate, which is a base. The simplified
H2CO3 --> (HCO3-)
- Metabolic mechanism controls bicarb;
amount of HCO3- is controlled by kidneys.
- Bicarbonate (HCO3-) is a base.
- High HCO3- causes alkalosis (raises
pH), or neutralizes acidosis.
- Low HCO3- causes acidosis (lowers
pH), or neutralizes alkalosis.
metabolic mechanism involves controlling the amount of bicarbonate in the blood.