contrast cellular respiration and fermentation and explain which process is more efficient. why do your body's cells use fermentation during intense exercise?

Cellular respiration produces 38Atp while fermentation produces 2 Atp, that being said Cellular respiration is more efficient than fermentation in the generation of ATP.

Explanation:

in fermentation, glucose reacts in the absence of oxygen to produce ATP. Cellular respiration is the more efficient process because it produces much more ATP from each glucose molecule than does fermentation. the body's cells use fermentation during intense exercise because their oxygen supply is limited

the answer to your question is b