Isotonic concentric contraction – this involves the muscle shortening ... the control of a movement on the downward phase and it works to resist the force of gravity. Figure caption, Left ...

Isotonic contractions – these occur when a muscle contracts and changes length ... control of a movement on the downward phase and it works to resist the force of gravity. Figure caption ...

When muscle cells are viewed under the microscope, one can see that they contain a striped pattern (striations). This pattern is formed by a series of basic units called sarcomeres that are ...