carbon dioxide released during respiration can affect the % oxygen saturation of haemoglobin. Carbon dioxide reacts with water to form carbonic acid. Which statements below explains the effect of carbon dioxide on haemoglobin? A. The release of hydrogen ions causes the pH to rise, which reduces haemoglobin's affinity for oxygen. B. The release of hydrogen ions causes the pH to rise, which increases haemoglobin's affinity for oxygen. C. The release of hydrogen ions causes the pH to fall, which increases haemoglobin's affinity for oxygen. D. The release of hydrogen ions causes the pH to fall, which reduces haemoglobin's affinity for oxygen. E. None of the above can explain the
1. carbon dioxide released during respiration can affect the % oxygen saturation of haemoglobin. Carbon dioxide reacts with water to form carbonic acid. Which statements below explains the effect of carbon dioxide on haemoglobin?
A. The release of hydrogen ions causes the pH to rise, which reduces haemoglobin's affinity for oxygen.
B. The release of hydrogen ions causes the pH to rise, which increases haemoglobin's affinity for oxygen.
C. The release of hydrogen ions causes the pH to fall, which increases haemoglobin's affinity for oxygen.
D. The release of hydrogen ions causes the pH to fall, which reduces haemoglobin's affinity for oxygen.
E. None of the above can explain the change.
2. The following events occur when carbon dioxide enters an erythrocyte in a capillary.
1. Hydrogencarbonate ions diffuse into the plasma from the red blood cells.
2. Dissociation of carbonic acid
3. Carbon dioxide reacts with water forming carbonic acid
4. Chloride ions diffuse into red blood cell from plasma
First step to Final step
A. 2 4 1 3
B. 3 2 1 4
C. 3 1 4 2
D. 2 3 4 1
E. 2 3 1 4
3. Fetal haemoglobin is able to obtain oxygen from maternal blood because
A. fetal blood is more acid than maternal blood.
B. maternal blood is more acidic than fetal blood.
C. fetal red blood cell contains more haemoglobin than maternal red blood cell does.
D. maternal haemoglobin binds BPG weaker.
E. fetal haemoglobin binds BPG weaker.
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