FA - hemoglobin dissociation curve question

[acciddropping]

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In FA 2013, Altitude causes the Hb dissociation curve to shift to the right - isn't the altitude the cause of respiratory alkalosis and so the curve should shift to the left instead? I am confused.

 

[Erek94]

You are correct that it causes an alkalosis but remember, at high altitudes your cells will kick out more 23BPG shifting it to the right

 

[acciddropping]

Ok txks!