THE CIRCULATORY SYSTEM - THE BLOOD - BLOOD AS A TRANSPORT MEDIUM
7 important questions on THE CIRCULATORY SYSTEM - THE BLOOD - BLOOD AS A TRANSPORT MEDIUM
What are the 2 ways oxygen is transported in the blood?
- 98% travels as oxyhaemoglobin - oxygen-haemoglobin complex.
- Remaining 2% is dissolved in the plasma.
What are the 3 ways CO2 travels in the blood?
- 70% as hydrogencarbonate ions (HCO3-) in the plasma.
- 23% combined with haemoglobin as a carbamino compound.
- 7% in simple solution in the plasma.
What is the structure of heamoglobin?
At the centre of each haem, there is an iron ion (Fe2+).
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What happens after the first heam group combines with oxygen?
What does an oxygen-dissociation-curve graph show?
What would happen if fetal Hb had the same affinity for O2 than that of the mother's Hb?
What is the Bohr effect, or Bohr shift?
When CO2 concentration is higher, haemoglobin does not hold on to its O2 well, tending to give up O2 in areas of high CO2, e.g. the respiring tissues.
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