Why does increased body temp increase the affinity of hemoglobin for Oxygen?

[Deepa100]

Please see the Q in subject.

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[ronu24]

Please see the Q in subject.

i think temperature is one of the factor for flow of blood.
incres. temp. - inc. flow.

 

[nothing123]

It does? Doesn't the body release oxygen more readily in highly metabolic conditions (increased temperature) and thus has a decreased affinity for oxygen? At any rate, I'm guessing the temperature has something to do with the kinetics of the dissociation reaction of oxygen from hemoglobin: HbO2 --> Hb + O2 and thus accelerating its release.

 

[FutureInternist]

Anything that happens in a working muscle --> decreased affinity of Hgb for O2 which makes sense since that's where you want the O2 to be unloaded.

Inc CO2, Inc Temp, Inc BPG, Dec O2, Dec pH,

I'm not sure where you got that inc temp --> inc affinity but I believe that's incorrect

 

[Deepa100]

nothing123,
You are right. I misread the solution. It actually decreases the affinity.

 

[161927]

CO2 + H2O <--> H2CO3 <--> H+ + HCO3-

It's a Le Chatelier's problem. If more CO2 is present, equilibrium shifts right, resulting in more H+, more acidic and more oxygen needed.

 

[fj4288]

Yeah, Increase in Temp. Decreases O2 saturation. It can be seen by the right shift of the O2 curve.