fermentation called lactic acid fermentation strenuous exercise energy demands exceed energy supply respiratory chain cannot process hydrogen atoms joined nadh anaerobic glycolysis nad sup sup regenerates pairs hydrogen combine pyruvate form lactate lactate formation catalyzed lactate dehydrogenase reversible reaction lactate also used indirect precursor liver glycogen recovery oxygen becomes available nad sup sup attaches hydrogen lactate form atp yeast waste products ethanol carbon dioxide type fermentation known alcoholic
Natural science Biology