Do all three types of muscle: smooth, skeletal, and cardiac use cross bridges for movement of muscles? What about tropinoin and tropomysin? Is it only skeletal and cardiac that utilize these specific myosin and actin components?

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Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.