There are approximately 642 skeletal muscles within the typical human, and almost refers to the action of each muscle from the standard anatomical position.
Opposition.
Type your answer here..masseters and medial pterygoids
The agonists are the muscles that help you to do this exercise. The antagonists are the muscles that bring you back to a regular position instead of being stuck.
Muscles change the relative position of the bones. The bones are just the passive (but required) part.
proprioceptors
Muscles are in pairs as when one muscle contracts, its pair will relax, and the limb is moved. The reverse happens when the limb is returned to its starting position. Muscles can pull, but they can't push.
Which muscles? If all the muscle are clenched it will be perfectly still but that could be in any position depending on what position the arm was in ot start with.
Biceps BrachiiBrachialisFlexor Carpi RadialisFlexor Carpi UlnarisBrachioradialisPronator Teresgenerally they are muscles that lie on the anterior portion of the arm when the body is in anatomical position.
Strap
Muscles move body parts by contracting and then relaxing. Your muscles can pull bones, but they can't push them back to their original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.
Not much, but if you take away too many you could die.
When lifting a weight off of the floor it's best to use the muscles in your hips primarily, but your back muscles are used in an isometric contraction to keep the spine in the same position as you lift.