Muscle, motor unit, mechanisms of muscle contraction

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Department
Biomedical Science
Course
BMS 360
Professor
Douglas Ishii
Semester
Spring

Description
14 FebruaryMuscles are excitable cellsCan generate action potentialsFigure 91AMuscle fiber has multiple nucleiMyoblasts fuseone fiberStriations on skeletal muscleFigure 92Fiber contains myofibrilscontracting unitFiber connected to tendon on each endBasic unitBetween 2 Z lines discsH zone in centerTitin filaments bind to Z line and myosinThick filamentmyosinThin filamentactin w troponin tropomyosinFigure 96Actin anchored at one end on Z lineMyosin has arms that grab actinActin strands pulled toward centerFigure 99
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