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Muscle Types and Their Characteristics

Muscle Types and Their Characteristics. Skeletal Muscle Anatomy. Muscle Fiber Anatomy. Anchoring the Myofilaments. Sarcomere Banding. Contraction in a Sarcomere. Thin and Thick Filaments of the Sarcomere. Actin. Thin Filament Side View. Thin and Thick Filament Interaction.

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Muscle Types and Their Characteristics

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  1. Muscle Types and Their Characteristics

  2. Skeletal Muscle Anatomy

  3. Muscle Fiber Anatomy

  4. Anchoring the Myofilaments

  5. Sarcomere Banding

  6. Contractionin a Sarcomere

  7. Thin and Thick Filaments of the Sarcomere

  8. Actin

  9. Thin Filament Side View

  10. Thin and Thick Filament Interaction

  11. Energetics of Troponin

  12. More on the Organization of the Thin Filament

  13. Attachment of Thin Filaments to Z-Lines

  14. A Schematic of Myosin

  15. Myosin Dimer

  16. "Polarity of the Thick Filaments"

  17. Polarity of the Myosin Power Stroke

  18. Arrangement of Myosin Heads Around a Thick Filament

  19. Linked Allosteric Forms of a Protein

  20. The Crossbridge Cycle Let's start here (relaxed muscle)

  21. Energy and Entropy Entropic systems change state randomly such that the macrostate remains the same. Organized systems change state in a decided direction (essentially the useful work of the system); "energy" input is what provide directionality.

  22. Ca++ Regulation at the SR

  23. Calsequestrin as a Ca++ Buffer

  24. Relative Binding Affinities of the SR-bound Ca++ Pump vs. Thin Filament Bound Troponin

  25. Ca++ and Binding to Troponin

  26. Questions: How is Thin Filament Regulation Organized? What has a greater potential activity -- Ca++ gates or Ca++ ATPase? What has a greater affinity -- the Ca++ ATPase or the calmodulin (troponin C)?

  27. Excitation-Contraction Coupling EC coupling is defined as the events that link a nervous system command (both contract and relax) to the mechanical events of muscle contraction.

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