A-LevelBiologyTransport in mammals9700/12 · May/June 2014 · Q291 Mark
Some babies are born with a hole between the right and left atria. These babies have an increased number of red blood cells. What is the reason for this increase?
AMore blood is needed because it is pumped faster.
BMore blood is needed because the pressure is lower.
CTheir haemoglobin has a higher affinity for oxygen.
DThere is less oxygen available to the newly born baby.
✓ Correct answer
D: There is less oxygen available to the newly born baby.
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