Sarcomeres

Myofibrils are just organelles within muscle cells that contain sarcomeres, which are the basic unit of muscle fibres. They span the entire length of muscle cells and are made of contractile actomyosin that allows them to contract. When a large number of ...

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... arteries, or the coronary sinus? 3) The myocardium does not contain which of the following: intercalated discs, conduction (Purkinje) fibers, sarcomeres, visceral pericardium, trabeculae carne I am pulling my hair out with these three. I will try to get the multiple choice options for the ...

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look it up? Myosin, tropomyosin, and the like? Look up sarcomeres.... etc.

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Myosin changes it's shape when it binds to ATP, making it able to detach from actin and move forward => sarcomeres shorten => contraction

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... about muscle fibres are TRUE? 1-When a sarcomere contracts, the width of the A-band remains unchanged. 2-When a muscle contracts, the width of the sarcomeres shrink, and the length of the myofibrils decreases. 3-The length of the thick filaments in a sarcomere corresponds to the width of the A-band. ...

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