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How do your arm muscles work to lift a mug of coffee to your lips?

1.The biceps muscle contracts while the triceps muscle relaxes. Only then can the forearm move up to lift the mug.
2.The muscle tendons in your arms stretch to their limit as a result of the flexibility exercises that lift the mug.
3.Your muscles rapidly increase the speed at which they twitch to trigger your arm movement.
4.Your biceps and triceps muscles first relax, and then the arm muscle raises the mug.

Respuesta :

1.The biceps muscle contracts while the triceps muscle relaxes. Only then can the forearm move up to lift the mug.
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Correct answer choice is :


1) The biceps muscle contracts while the triceps muscle relaxes. Only then can the forearm move up to lift the mug.

Explanation:

This rotator cuff muscle supports with the raising and lowering of the upper arm. Triceps brachii, This large tissue in the back of the upper arm helps realign the arm. Pectoralis major, This large fan-shaped muscle extends from the armpit up to the collarbone and down across the below chest area.

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