haemoglobin

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11 Terms

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structure

globular protein with 4 polypeptide chains, 2alpha globin and 2 beta globin…each chain consists of a haem group with Fe2+ that binds to oxygen reversibly

<p>globular protein with 4 polypeptide chains, 2alpha globin and 2 beta globin…each chain consists of a haem group with Fe2+ that binds to oxygen reversibly </p>
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oxyhaemoglobin formula

Hb+4O2—>HbO8

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haemoglobin saturation

dependent on the partial pressure of oxygen in surroundings

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association

occurs when partial pressure of oxygen is high

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dissociation

occurs when partial pressure of oxygen is low

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importance of haemoglobin

quick and efficient loading of oxygen in lungs…efficient unloading in respiring tissues

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haemoglobin dissociation curve

shows oxygen saturation levels relative to the partial pressure of oxygen

<p>shows oxygen saturation levels relative to the partial pressure of oxygen</p>
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partial pressure of oxygen in the atmosphere at sea level

20kPa

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partial pressure in the lungs at sea level

13kPa

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partial pressure at high altitude in atmosphere

10kPa

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partial pressure in lungs at high altitude

5.3kPa