Relaxes
contracts - for antagonistic muscle pairs e.g. muscles in arm (when one relaxes, other contracts, and vice versa)
The other relaxes. This other is called the antagonist. The one contracting is called the agonist.
When one muscle pulls, the other muscle relaxes.
When the bicep contracts, the tricep relaxes. These pair of muscles are known as antagonists which means as one contracts, the other relaxes and vice versa.
the answer is when one muscle contracts the other relaxes
contract
It relaxes
When one muscle of a pair contracts, the other muscle of the pair relaxes to allow movement of the body part.
When one muscle of a pair contracts, the other muscle of the pair relaxes to allow movement of the body part.
Because muscle cells can only contract, not extend, skeletal muscles most work in pairs. While one muscle contracts, the other muscle in the pair relaxes to its original length.
it means when one muscle contracts the other relaxes like the biceps and triceps