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How muscles work

How muscles work. Skeletal Muscle Structure. Components of a Muscle Fiber. The Sarcomere. Dfdfsdfsd ssdfdf. Gfgdf bvbcv. Gfgdf bvbcv. Gfgdf bvbcv. Cvcx. Z-line. Sliding filament theory. Fig. 10-9. Overview of the process. Fig. 10-9. Overview of the process.

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How muscles work

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  1. How muscles work

  2. Skeletal Muscle Structure

  3. Components of a Muscle Fiber

  4. The Sarcomere Dfdfsdfsd ssdfdf Gfgdf bvbcv Gfgdf bvbcv Gfgdf bvbcv Cvcx Z-line

  5. Sliding filament theory

  6. Fig. 10-9. Overview of the process

  7. Fig. 10-9. Overview of the process The muscle fiber is stimulated.

  8. Fig. 10-9. Overview of the process The muscle fiber is stimulated. Ca2+ ions are released.

  9. Fig. 10-11. “End-on” view of thick & thin filaments, showing the effect of calcium ions after release from the S.R.

  10. Fig. 10-9. Overview of the process The muscle fiber is stimulated. Ca2+ ions are released.

  11. Fig. 10-9. Overview of the process The muscle fiber is stimulated. Ca2+ ions are released. Thin filaments move to middle of sarcomere.

  12. Fig. 10-12 Calcium attaches to troponin/ tropomyosin; they roll away, exposing the active site on actin.

  13. Fig. 10-12 After attachment, the cross-bridges pivot, pulling the thin filaments. Myosin cross-bridges attach to active site on actin.

  14. Energy from the splitting of the fresh ATP allows repositioning of the myosin head. A fresh ATP replaces the ADP+Pi, allowing myosin and actin to detach.

  15. Fig. 10-12 This leads back to Step 1, which continues the cycle as long as calcium ions are attached to troponin/tropomyosin.

  16. Fig. 10-9. Overview of the process The muscle fiber is stimulated. Ca2+ ions are released. Thin filaments move to middle of sarcomere.

  17. Fig. 10-9. Overview of the process The muscle fiber is stimulated. Ca2+ ions are released. Thin filaments move to middle of sarcomere. Muscle fiber contracts.

  18. Fig. 10-9. Overview of the process The muscle fiber is stimulated. Ca2+ ions are released. Thin filaments move to middle of sarcomere. Muscle fiber contracts. Muscle tension increases.

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