NEET Biology question

For how long, contraction of the muscles continues in sliding filament theory?

(A)Till ATP binds to myosin head
(B)Till ADP binds to myosin head
(C)Till Ca2+ present in sarcoplasmCorrect
(D)Till polymerization of myosin head is going on

Answer: (C)

Solution

Sliding of the actin and myosin filaments continues as long as calcium ions remain available in the sarcoplasm to keep the myosin-binding sites exposed; once Ca2+ is pumped back

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Question ID VK-116988