Answer :

Muscle contractions extend from the muscle fibers through the connective tissue, pulling on the bones and causing skeletal movement. The pull exerted by a muscle is called tension, and the force produced by that tension varies.

Muscle contraction can be described by two variables: length and tension. A muscle contraction is said to be isometric if the muscle tension changes but the muscle length remains the same. In contrast, a muscle contraction is isotonic if the muscle tension remains the same throughout the contraction. Skeletal muscles are attached to bones by ligamentous tendons, such as in the legs, arms, and face. Skeletal muscle is called striated muscle because it is made up of fibers that show horizontal stripes when viewed under a microscope.

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