why at least two muscles are needed to move a bone at a joint in a particular direction
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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.
Answered by
0
Answer:
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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