Some babies are born with a hole between the right and left atria. These newly born babies are found to have an increased number of red blood cells.
What is the reason for this increase?
1 )
More blood is needed because it is pumped faster.
2 )
Newly born babies’ haemoglobin has a higher affinity for oxygen.
3 )
Newly born babies’ haemoglobin molecules only have one haem group.
There is less oxygen available to the newly born baby.
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