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Contraction

Name the ion ...

Question

Name the ion responsible for binding actin and myosin filaments.

A

Sodium

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B

Potassium

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C

Calcium

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D

Magnesium

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Solution

The correct option is C
Calcium

The impulse for contraction reaches the muscle through nerves, which triggers the release of calcium ions into the cytoplasm. Calcium ion is responsible for binding actin and myosin filaments. Thus, actin binds with the head of myosin filaments.

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