A protein that is able to carry four oxygen molecules.
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What is association and what is this determined by?
The combining of oxygn wth haemoglobin to form oxyghaemoglobin. The amount of oxygen that associates with haemoglobin is determind by the partial pressure of oxygen.
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When is oxyhaemoglobin formed?
Haemoglobin readily associates with oxygen when the PP of oxygen is high at the alveoli so the blood leaving the alveoli is almost 100% saturated with oxygen.
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What is dissociation?
The release of oxygen from haemoglobin for gaseous exchange.
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When does dissociation occur?
As the PP of oxygen decreases, the haemoglobin more readily dissociates with oxygen, releasing it to the respiring tissue, such as the muscles.
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What changes during exercise?
PP of oxygen lowers in the muscle cells and more oxyge dissociates from the haemoglobin for diffusion.
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What is the Bohr shift?
A move in th oxyghaemoglobin dissociaion curve to the right caused by increased acidity in the bloodstream.
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Factors that affect the dissociation of oxygen
During exercise, the muscle tissue increases in temperature, increases in production of CO2 and increases production of lactic acid and carbonic acid. These factors increase the dissociation of oxygen from haemoglobin.
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Other cards in this set
Card 2
Front
What is haemoglobin?
Back
A protein that is able to carry four oxygen molecules.
Card 3
Front
What is association and what is this determined by?
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