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Muscle Spindle ResponsesProperties of Smooth MuscleOne nucleusTropomyosinNo troponinDense bodies analogous to Z lineSlow myosin ATPaseMyosin has light chainsLittle sarcoplasmic reticulum
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Contraction SpeedFigure 12.23
Oxidative and Glycolytic FibersFigure 12.24
Muscle FatigueFigure 12.25
Muscle AttachmentsFigure 12.26
Antagonistic MusclesFigure 12.27
Muscle SpindleFigure 12.28
Muscle Spindle ResponsesFigure 12.29
Alpha / Gamma CoactiviationFigure 12.30
Golgi Tendon OrgansFigure 12.31
Muscle Tissue TypesFigure 12.32
Properties of Smooth MuscleOne nucleusTropomyosinNo troponinDense bodies analogous to Z lineSlow myosin ATPaseMyosin has light chainsLittle sarcoplasmic reticulum
Smooth Muscle CellFigure 12.33
Excitation-Contraction CouplingFigure 12.34
Single-Unit MuscleFigure 12.35b
Properties of Single-Unit Smooth MuscleGap junctionsPacemaker cells with spontaneous depolarizations Innervation to few cellsTone = level of contraction without stimulationIncreases/decreases in tensionGraded ContractionsNo recruitmentVary intracellular calciumStretch ReflexRelaxation in response to sudden or prolonged stretch
Multi-Unit MuscleFigure 12.35a
Multi vs. Single-Unit MuscleFigure 12.35
Spontaneous DepolarizationsFigure 12.36
Cardiac MuscleFigure 12.37
Muscle ComparisonsTable 12.2