| 1. | The myofibrils of smooth muscle cells are not arranged into sarcomeres.
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| 2. | Muscle contraction consists of the simultaneous shortening of multiple sarcomeres,.
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| 3. | Calcium ions are required for each cycle of the sarcomere.
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| 4. | The action of myosin attachment and actin movement results in sarcomere shortening.
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| 5. | PKC? translocates to cardiac muscle sarcomeres and modulates contractility of the myocardium.
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| 6. | This enables proper assembly of myofibrils and thus, more organized sarcomeres.
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| 7. | A cell from the biceps brachii muscle may contain 100, 000 sarcomeres.
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| 8. | The sarcomeres are composed of thin and thick filaments.
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| 9. | The sarcomere does not contain organelles or a nucleus.
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| 10. | This causes the filaments to start sliding and the sarcomeres to become shorter.
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