Question

How do the biceps and triceps make the arm move up and down?​

Answer 1

Answer:

Biceps contract to make the arm bend.

Triceps relax.

Again to make the arm straight, Triceps contract and biceps relax.

Hope it helps you my dear friend.

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Answer 2

Answer:

Biceps and triceps muscles move together to allow you to bend and straighten your elbows. When you want to bend your elbow, your biceps muscles contract, and at the same time, the triceps muscles relaxes. The biceps is the flexor, and the triceps is the extensor of your elbow joint.