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AS Biology P1 MCQs Preparation Thread

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please explain why A and not D?View attachment 51371
"resting" muscles means that the partial pressure of O2 is high and partial pressure of Co2 is low, which means there will be no Bohr's shift. So B and C are blunder..
Now as we know that HB realeases the oxygen when partial pressure of Co2 is high and partial pressure of O2 is low... so in resting muscle very less oxygen is released Hence the Ans in A.
If the statement was what is the %age saturation of HB when blood passes through an actively respiring muscle, the Answer would have been "C"..
Hope this Helps...:)
 
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"resting" muscles means that the partial pressure of O2 is high and partial pressure of Co2 is low, which means there will be no Bohr's shift. So B and C are blunder..
Now as we know that HB realeases the oxygen when partial pressure of Co2 is high and partial pressure of O2 is low... so in resting muscle very less oxygen is released Hence the Ans in A.
If the statement was what is the %age saturation of HB when blood passes through an actively respiring muscle, the Answer would have been "C"..
Hope this Helps...:)
sorry the answer given is D :( and my question is why not A
 
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sorry the answer given is D :( and my question is why not A
Still then ans is D its just that there will be no bohrs shift... Arguments will the same with just a mere change that at body cellular level haemoglobin nearly looses all O2 and if it is an actively respiring muscles where partial pressure of CO2 is too high then Bohr's shift occurs and tgen the ans is C
 
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does that imply that be it a actively respiring or resting tissue, the % saturation has to be low and haemoglobin has to lose 50% of its oxygen no matter it is a actively respiring or a resting tissue?
Still then ans is D its just that there will be no bohrs shift... Arguments will the same with just a mere change that at body cellular level haemoglobin nearly looses all O2 and if it is an actively respiring muscles where partial pressure of CO2 is too high then Bohr's shift occurs and tgen the ans is C
 
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