Answer:
By inhibiting pyruvate kinase in the liver isoenzyme, the muscle will initiate the lactic acid fermentation process that will provide NAD to allow glycolysis
Answer:
Plants have cell walls, mammals have cell membranes.
Well, different organisms require different things. A single celled bacteria does not need a lot at all compared to a plant or animal. One cell can support a bacrerium. An animal needs many cells to carry out the functions necessary for it to live.
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