Question

tricep and bicep in upper arm are necessary for movement of lower arm.
why? ​

Answer 1

This would be a problem if a joint were controlled by just one muscle. ... For example, your elbow joint has two muscles that move your forearm up or down. These are the biceps on the front of the upper arm and the triceps on the back of the upper arm: to raise the forearm, the biceps contracts and the triceps relaxes.

Answer 2

PLEASE MARK IT AS BRAINLIEST

hey mate...

your answer...

Antagonistic muscles. ... For example, your elbow joint has two muscles that move your forearm up or down. These are the biceps on the front of the upper arm and the triceps on the back of the upper arm: to raise the forearm, the biceps contracts and the triceps relaxes.