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pH Change in the Body





> >  name       Helen
>status     student
>   age        14
>
>   Question -  why is the levels of pH in human subject
>different at  various hours of the day?
>
>
>The pH of the arterial blood and most extra-cellular fluids of the body
>varies very little from its normal value of about 7.4. Very small changes of
>.1 to .2 are serious!
>
>pf
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