The application of muscular force with movement is called muscle contraction. This occurs when muscles generate tension and shorten in length to produce movement such as lifting a weight or running.
Flexion
Antagonistic muscle pairs. That means to work in opposition to each other.One muscle produces movement in one direction and the other muscle produces movement in the opposite direction. It would seem to be contradictory but a very smooth movement occurs when they work this way.
When a movement occurs in two planes, it is called turbulence.
Adduction movement occurs when a muscle moves a limb towards the midline of the body. This movement decreases the angle between the limb and the body.
The biceps muscle relaxes!!!!!=)
rotation
This the way the movement occurs in smooth muscle. Peristalsis occurs in the intestine. Segmental movements occur there also but in large waves.
focus UwU
The a voluntary muscle contracts involuntarily, you will see a little movement through your skin. These movements are often called Tics, Twitches, and Spasms. If the involuntary contractions are widespread and very energetic, they may be called, "Seizures".
rotation
This the way the movement occurs in smooth muscle. Peristalsis occurs in the intestine. Segmental movements occur there also but in large waves.