- Haemoglobin is made up of four polypeptide chains, each containing a prosthetic haem group. Each haem group binds one oxygen molecule
- Binding of the first O2 molecule causes a conformational change in the haemoglobin, making the haem groups more accessible to oxygen.
- Bohr affect- haemoglobin’s oxygen binding affinity is inversely related to the concentration of carbon dioxide, causing the oxygen dissociation curve to shift
- The cardiac cycle is the sequence of events that occur within one full beat of the heart.
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