A muscle can _____

Pull only

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Push only

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Pull and Push

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None of these

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Solution

The correct option is A
Pull only

Muscles can only pull and cannot push. This would be a problem if a joint was controlled by just one muscle. As soon as the muscle has contracted and pulled on a bone, that would be it, with no way to move the bone back again. The problem is solved by having muscles in pairs,called antagonistic muscles in opposite directions.

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