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muscle systems, Jamie Pino, pd.4 (characteristics of muscle tissue…

- - - - movement
      - stabilize joints
      - maintain posture
      - generate heat
    - - muscular dystrophy: muscle mass loss, weakness
- - - - actin potential triggers proteins in the t-tubes
        
        troponin binds with calcium
        
        the myosin heads grab molecule and break it down
        
        the myosin then binds to acetylcholine
        
        sarcomere shrinks
        
        ADP and phosphate unbind with myosin
        
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- - - - the fascicle is surrounded by perimysium
        
        inside the fascicle are muscle fibers surrounded by endomysium, the sarcolemma is under it, there's nucleus
        
        Inside muscle fibers are myofibril (composed of bundles of myofilaments)
        
        there are sarcomeres that make up those myofilaments
        
        sarcomeres are a segment of myofibril composed of thin (actin) filament and (thick myosin) filaments
- - - - moving arm upward: flexation
        
        moving arm downward: extension
        
        moving head side to side: rotation
        
        face upward motion: elevation
        
        moving face downward motion: depression
        
        moving jaw outward: protraction
        
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