skeletal muscle - saint louis universitystarklab.slu.edu/physiolab/skeletalmuscle.pdf(a) skeletal...
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Skeletal Muscle
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Types of Muscle
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Skeletal Muscle Function
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Organization
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Ultrastructure
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Fibers
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Sarcomere Organization
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Regulation
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E-C Coupling
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E-C Coupling
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Electrical and Mechanical
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Muscle Fiber Types
palereddark red (myoglobin)Color
Glycolytic, more anaerobic than fast-twitch
Glycolytic, more oxidative withtraining
Oxidative, aerobic, numerousmitochondriaMetabolism
Easily FatiguedFatigue ResistantFatigue ResistantEndurance
HighHighModerateCa-ATPase
ShortShortLongestContraction Duration
LargeMediumSmallDiameter
FastFastSlowMyosin ATPase
activity
FastestIntermediateSlowestTime of tension
Fast Twitch Glycolytic; White MuscleFast-Twitch Oxidative; Red MuscleSlow Twitch Oxidative; Red Muscle
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Tetanus?
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Knee Jerk Reflex
• Figure 13.7• Stimulus is the hammer on the patellar
tendon• Afferent Path CNS Efferent Path Muscle Contraction and forced relaxation
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Summation