Oxyhaemoglobin Dissociation Curve

Question 1

Association

Answer 1

When o2 combines with haemoglobin through diffusion at the lungs to give oxyhaemoglobin

Question 2

saturated

Answer 2

The amount of O2 combined with haemoglobin usually expressed as % and depends on ppO2. Haemoglobin Is 100% saturated at the lungs

Question 3

Dissociation

Answer 3

When o2 releases from haemoglobin through diffusion at the muscles

Question 4

Oxyhaemoglobin dissociation curve

Answer 4

Shows us the relationship between ppO2 and % saturation of haemoglobin

Question 5

Affinity

Answer 5

How much the o2 wants to associate. O2 will associate slowly to start with and then increase with speed

Question 6

Look at

Answer 6

Curve

Question 7

What happens as more o2 molecules associates

Answer 7

Affinity increases

Question 8

Bohr shift

Answer 8

During exercise more O2 dissociates from the haemoglobin because of an increase in CO2. This forces off the O2 and reduces its affinity

Question 9

Two other factors that increase dissociation

Answer 9

Body temperature increases, O2 is more likely dissociate from the haemoglobin
Acidity- lactic and carbonic acid increases acidity in the blood
Makes o2 more likely to dissociate haemoglobin