Many of the symptoms you describe are vague and could be due to a number of things including Provera. Some of the common side effects of this medication include weight gain, weak bones, headaches, fatigue, swelling. These symptoms could also be caused by a number of things such as thyroid problems.
Myofibrils are assembled of repeated structures called sarcomeres â the smallest functional unit of muscle fiber. Each sarcomere is formed of actin (called thin) and myosin (called thick) filaments arranged in a precise order and of protein complexes which support the filament structures.
Making the world better, one answer at a time. The functional unit of (skeletal) muscle is the sarcomere, which is made of myosin and actin filaments. (The actin filaments move toward each other during muscle contraction).The sarcomeres are lined up one after another to form skeletal muscle.aking the world better, one answer at a time. The functional unit of (skeletal) muscle is the sarcomere, which is made of myosin and actin filaments. (The actin filaments move toward each other during muscle contraction).