CAIE A Level Biology 9700 · Transport in mammals
During strenuous exercise, skeletal muscle cells respire actively, producing large amounts of carbon dioxide. Describe the transport of carbon dioxide from these muscle cells to the lungs, and explain the importance of the Bohr shift in this process.
7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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