diaphragm....
It produces protein.
smooth muscle
The general opposite of contraction is expansion, or possibly inflation. For muscles, the opposite of contraction is relaxation.
contraction and relaxation of the heart muscles
contraction and relaxation of the heart muscles
A hereditary disease of the muscles characterized by prolonged contraction of the muscles whenever voluntary motion is attempted, contraction and relaxation being slow and the muscles stiff.
Contraction and relaxation are two opposites. They work together when the muscles of the body work. A good example is the contraction and relaxation of the heart. The contraction allows blood to be distributed to the parts of the body while the relaxation allows the heart to be oxygenized and therefore fill up blood to be distributed to the whole body.
Active - as it involves the contraction of muscles.
Myotoniamyotonia
Both aid in the expansion and relaxation of lungs.
Shivering is the rapid contraction and relaxation of muscles to generate heat.
It isn't just muscles, but the interaction between muscles, ligaments, tendons, nerves, and the bones that permit movement. In muscles only, it's contraction and relaxation, but without the rest involved, the muscles would not result in purposeful movements.