Name the two major factors that influence the strength of a muscle contraction and list the effects they each have. Be sure to describe the different types of muscle contractions (e.g. twitch, tetanus) and what causes them.

The skeletal muscle, also called the skeletal muscle, is located in the vertebrates, which are the most common of these three types of muscles in the body. The skeletal muscles are attached to the bones by the bones, and produce all the joint movements of the body in relation to each other.