For an agonist to be effective as a mover in the skeletal system it must actually cross one or more structure(s) that can move. This is typically where the muscle crosses a joint by way of a connecting tendon. As the myofibrils of a muscle are excited into action and then contract, they will create tension and pull through the tendon and pulling the lever arm of bone on the opposite side of the joint closer to the muscles origin.
Researchers from Michigan State University, Department of Internal Medicine detail findings in bladder cancer.
Jun 30, 2010; Data detailed in 'A report of iliac muscle abscess due to Mycobacterium bovis after bacillus Calmette-Guerin therapy for bladder...