Anaerobic and aerobic respiration

The graph shows oxygen supply and demand in muscle cells during exercise.

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Which statement correctly describes what is happening in the muscle cells between 0 and 11minutes?
A Anaerobic respiration only is taking place

B More oxygen is being supplied than is required

C Aerobic respiration only is taking place

D Both anaerobic and aerobic respiration are taking place

E -

Here the answer is D , can somoene explain why

Hi, its D because in the first 11 minutes we see an increase in the oxygen supply, so the muscle cells can do some (little) aerobic respiration using the oxygen supplied. However, mostly anaerobic respiration would be taking place, because the oxygen demand is way above oxygen supply.


Thanks ! that makes much more sense now !

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