Explain how muscles bring about movement in your arm
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Explain how muscles bring about movement in your arm
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Answer:
Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.
Answer:
Explanation:
Muscles in the arm contract in response to nerve signals from the brain. This contraction occurs through the sliding filament theory, where actin and myosin filaments slide past each other. The resulting shortening of muscle fibers generates force. Nerve impulses cease after contraction, allowing the muscle to relax. The coordinated process enables the arm to move and perform various actions.