The Student Room Group

GSCE edexcel biology paper 2

What did everyone get for the question where it asked why the athlete breathed more heavily??
Running = vigorous exercise, which means more respiration is carried out. More respiration in muscles means more oxygen is needed, increased breathing rate increases oxygen to keep up with the demand for energy. I hope this helps! It is a 2 marker anyway I think, so it will be marked relatively generously

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