Question

5. Why are at least two muscles needed to move a bone at a joint in one directions​

Answer 1

Explanation:

Because contraction of one muscle and relaxation of other muscle leads to the movement of the joint in one direction. muscles in our body can not push. they can only pull. so if 1 set is present, the hand cannot move and the set of muscles will not be able to relax and damage can occur to this set of muscles

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Answer 2

because contraction of one muscle and relaxation of other other muscle leads to the movement of the joint in one direction muscles in our body can not push,they can only pull,so if one set is present the hand Connot move and the set of the muscles will not able to relax and damage can occur to this set of muscles

Explanation:

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