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There more thin filaments than thick filaments in smooth muscle. The ratio is of the thin to thick filaments in the smooth muscle is approximately 15:1.
Myosin
Myosin. The A band has thick (myosin) and thin (actin) filaments.
thick filaments and thin filaments
The thin filaments are actin, and the thick filaments are myosin. The filaments run parrel to one another along the length of the sarcomere.The dark bands that occur in the middle of the sarcomere are regions where the thick filaments and thin filaments overlap.
Interactions between actin and myosin filaments of the sarcomere are responsible for muscle contractions. The I bands contain only thin (actin) filaments, whereas the A bands contain thick (myosin) filaments.
I-Band
when the Thick filaments pull the thin filaments toward the center of the sarcomere
Myofibrils are made up of actin (thin filaments) and myosin (thick filaments).
thick and thin bands (lines) of filaments.
thick and thin bands (lines) of filaments.
A-band. It has actin (thin protein) and myosin (thick protein) overlapping within it