Question

Which of the following ions help in muscle contraction ?

Answer 1

Answer:

Calcium Ions

Explanation:

The muscle contraction cycle is triggered by calcium ions binding to the protein complex troponin, exposing the active-binding sites on the actin. As soon as the actin-binding sites are uncovered, the high-energy myosin head bridges the gap, forming a cross-bridge.

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Answer 2

Answer:

Calcium ions which are released by the sarcoplasmic reticulum removes the myosin binding sites and thus helps in contraction of muscle.