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Where do haemoglobin and O2
Where is PO2 high?
Where is PO2 low?
Hb moves carbon dioxide in which direction?
Describe briefly the role of a competitive inhibitor in blood gas transport.
External molecule may affect whether Hb is able to bind oxygen directly at or near the oxygen binding site. (Inhibits oxygen binding)
What is meant by an allosteric site in terms of blood gas transport?
Binds to a region of Hb that controls how it folds in three dimensions.
Where is more oxygen bound and where is it deposited?
More oxygen is bound in lungs.
More deposited in tissues.
True or False: Oxygen is poorly soluble in plasma.
True - Normal arterial blood carries 70x more oxygen on Hb in RBCs than dissolved directly in plasma.
Although arterial PO2 may be normal, which one of the following may occur?
Why can hypoxia occur despite arterial PO2 remaining normal?
No Hb is present to carry oxygen.
Describe the binding that occurs in Hb.
Where does haemoglobin bind to O2?
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