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Muscular System (Body Movement Terminology (Adduction (Movement of a limb…

- - - - jaw opening
  - - - Jaw closing
- - - - Thick
        
        Contain bundled myosin molecules
      - Thin
        
        Contain actin molecules(plus other proteins)
  - - - Thin filament only
  - - - Thick and Thin filaments
  - - - Thick filaments only
  - - - Filled with extracellular fluid
- - - - Vastus Medialis
      - Vastus Lateralis
      - Vastus Intermedius
      - Rectus Femoris
    - - Bicep Femoris
      - Semitendinosus
      - Semimembranosus
- - - - Myosin attaches to actin, Forming actin/myosin crossbridges
    - - This action is repeated many times powered by ATP
    - - Ca++ binds to actin myofilament, exposing the myosin binding site
    - - Z lines get closer together as actin and myosin filaments slide past each other, and sarcomeres shorten(H zone disappears), shortening the entire myofibril
    - - Nerve impulse or action potential travels down sarcolemma and into T-tubules, causing sarcoplasmic reticulum to release Ca++ into Sarcoplasm
    - - Myosin head moves toward M line of sarcomere, pulling actin filaments past myosin