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How does your arm muscle work to lift a mug of coffee to your lips
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How does your arm muscle work to lift a mug of coffee to your lips

User Eric Cousineau
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The nervous system connects to everything. The nervous system sends a signal from your brain and to your muscles, telling them to lift a mug. It's just like my brain is telling my muscles in my fingers what letters to type.
User Jiasli
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