asmi
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Why does HCO3 buffer the blood?
A. it cannot enter RBC
B. it cannot leave RBC
C. CO2 supply is maintained by the lungs
d. its PKa value is nearly equal to bloods PH
E.H2CO3 can give CO2 and H2O.
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| meg
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e) it is in equilibrium with carbonic acid forming CO2 and H20
The pka of HC03- is 6.1 which is the closest to normal Ph compared to other buffers but it is not nearly equal to blood ph as choice d says.
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| asmi
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Yes,
But if choices like this are given,what should we consider.
I found this question on one biochemistry forum.
Is it true that HCO3 cannot enter RBC once it leaves.
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| meg
Forum Guru
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I think it can enter teh RBC if equilibrium is disturbed.
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| meg
Forum Guru
Topics: 62
Posts: 806
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I mean combine with H+ , break down into CO2 and reenter RBC
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