What did you include in your response? Check all that apply.
Sample Response: When the muscle on the top of the
arm relaxes and the muscle on the bottom of the arm
contracts, the arm straightens. When the muscle on top
of the arm contracts and the muscle on the bottom of the
bone relaxes, the arm bends. Muscles work in pairs to
create movement.
The contraction and relaxation of muscle pairs
work to move bones.
Bones and muscles work together to allow
movement.
Muscles work in pairs to create movement.
us Activity
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