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Question : The contraction of the muscle continues in sliding filament theory

Answer»

till ATP binds to MYOSIN head
till ADP binds to myosin head
till `CA^(2+)` is present in SARCOPLASM
till polymerisation of myosin head is going on

Solution :Sliding of ACTIN and myosin filaments continous till the `Ca^(2+)` ions are pumped back in the sarcoplasm, resulting in MASKING of actin filaments. This cause the return of Z-lines back to their original position, i.e, relaxtaion.


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