Loading, Transport & Unloading of Oxygen (AQA A-Level Biology): Flashcards

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Loading, Transport & Unloading of Oxygen
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Bohr effect

Reduced O2O_2 affinity when CO2CO_2 concentration increases

Effect of high CO2CO_2 on haemoglobin O2O_2 affinity

Reduces affinity, promotes O2O_2 release

O2O_2 dissociation curve shift with low CO2CO_2

Shifts left (increased O2O_2 affinity)

O2O_2 dissociation curve shift with high CO2CO_2

Shifts right (decreased O2O_2 affinity)

How CO2CO_2 affects haemoglobin shape

CO2CO_2 forms acid, lowers pH, changes haemoglobin shape

Haemoglobin O2O_2 saturation in lungs (%)

97%

Haemoglobin O2O_2 saturation returning to lungs (%)

75%

O2O_2 molecules unloaded per haemoglobin in active tissues

Three oxygen molecules

Lugworm haemoglobin adaptation

High O2O_2 affinity, curve left-shifted for low-O2O_2 burrows

Llama haemoglobin adaptation

High O2O_2 affinity, curve left-shifted for high altitude

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