Haemoglobin in red blood cells loads oxygen in the lungs at high partial pressure of oxygen (pO2) and unloads it in tissues at low pO2, with unloading aided by higher carbon dioxide concentrations.
Haemoglobin in red blood cells loads oxygen in the lungs at high partial pressure of oxygen (pO2) and unloads it in tissues at low pO2, with unloading aided by higher carbon dioxide concentrations.
| Front | Explain how oxygen is loaded, transported and unloaded in the blood. ( 6 marks) |
|---|---|
| Back | 1. Haemoglobin carries oxygen / has a high affinity for oxygen / oxyhaemoglobin; 2. In red blood cells; 3. Loading / uptake/association in lungs; 4. at high p.O2 ; 5. Unloads / dissociates / releases to respiring cells / tissues; 6. at low p.O2 ; 7. Unloading linked to higher carbon dioxide (concentration); |
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