the smooth muscle
Cardiac
The bicep muscle. The tricep contracts to straighten the arm as the bicep relaxes.
Relaxes
contract
gdg
I think what your after is called an antagonistic pair of muscles, for example the bicep and the tricep. When the bicep is contracting the tricep relaxes and when the tricep is contracting the bicep relaxes.
antagonist.
relaxes
It Contracts
It relaxes
A muscle that contracts shortens whereas a muscle that relaxes lengthens.
false