Which of the following increases in muscle cells when they are lacking in oxygen?
(a) carbon dioxide
(b) lactose
(c) lactic acid
(d) uric acid
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Solution
(c) lactic acid In the muscle cells that lack oxygen, concentration of lactic acid is increased. This is because, here, anaerobic respiration takes place in which glucose is converted into lactic acid with the release of a small amount of energy.