Each gram of mammalian skeletal muscle consumes ATP at a rate of about 1 × 10−3 mol/min during contraction. Concentrations of ATP and creatine phosphate in muscle are about 4 mM and 25 mM, respectively, and the density of muscle tissue can be taken to be about 1.2 g/ cm3.
(a) How long could contraction continue using ATP alone?
(b) If all creatine phosphate were converted into ATP and utilized as well, how long could contraction continue?
(c) What do these answers tell you?
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