1.

____ helps to maintain pH of blood between 7.26 to 7.42

Answer»

`CO_(2)`
`H_(2)CO_(3)`
`CO_(3)^(20-)`
`H_(2)CO_(3) or HCO_(3)^(-)`

Solution :`H_(2)CO_(3) or HCO_(3)^(-)` BUFFER system help to maintain PH of blood between 7.26 to 7.42


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