Run +Before* 200 After 150 100 50 20 40 60 Time (min) Blood [lactate] (µm)
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The concentrations of lactate in blood plasma before, during, and after a 400 m sprint are shown in the graph.
(a) What causes the rapid rise in lactate concentration?
(b) What causes the decline in lactate concentration after completion of the sprint? Why does the decline occur more slowly than the increase?
(c) Why is the concentration of lactate not zero during the resting state?
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