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9 Cards in this Set
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- Back
- 3rd side (hint)
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Haemoglobin |
A red protein responsible for transporting oxygen for respiration in cells |
Oxygen |
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Haemoglobin structure |
Quaternary structure made of 2 alpha helix and 2 beta pleated sheets. Each subunit has polypeptide chains and heme groups. Contains iron ions (fe2+) which give it the colour red |
Quaternary |
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Erythrocyte + properties |
A red blood cell: Biconcave - large SA to VR. Small and flexible - to pass through cappillaries. Flat shape - short diffusion pathway. No nucleus - more space for haem.. 270 million haemoglobin |
Red |
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Positive co operativity |
As one molecule binds , HB changes shape to allow other oxygens to ascociate more readily |
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Oxyhaemoglobin |
Hb + 4O2 = HbO8 |
Equation |
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Partial pressure |
pO2 Amount of oxygen in a tissue. Measured in Kpa. |
O2 |
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High partial pressure |
Ventillation allows lungs to have a high pO2. Where PO2 is high more oxygen is able to ascociate with haemoglobin molecules to be transported. High percentage saturation. |
Ventillation |
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Low partial pressure |
Respiring tissues like muscles. At low PO2 O2 discociates from OHB and can diffuse from respiring cells. Production of CO2 lowers PH of cell altering shape of HB and unloading O2 more easily. |
Respiration |
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What does a haem group contain: |
Each haem group contains an Fe2+ ion. |
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