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24 Cards in this Set
- Front
- Back
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myo, mys, sarco
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muscle
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skeletal muscle tissue
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longest, striations, voluntary control
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cardiac muscle tissue
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striated, involuntary
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smooth muscle tissue
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no striations, involuntary
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excitability/responsiveness/irritability
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ability to recieve and respond to stimulus (inside or outside body)
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contractility
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ability to shorten forcibly when adequately stimulated
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extensibility
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ability to be stretched or extended
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elasticity
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ability to recoil and resume resting length
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muscle functions
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movements, maintains posture, stabilizes joints, generates heat
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nerves & muscles
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each skeletal fiber is supplied with a nerve ending that controls its activity
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connective tissue & muscles
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endomysium (aerolar & reticular surround), fasicle (grouping), perimysium (surround fasicle), epimysium (outside muscle)
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insertion vs origin
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movable vs less moveable bone
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indirect muscle attachment
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tendon or aponeurosis
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muscle PM
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sarcolemma
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striations
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dark A bands + light I bands
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sarcomere
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regoin between two Z discs
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thick filament
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myosin (tail + 2 heads)
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thin filament
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actin (G & F)
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tropomysin & troponin
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help stiffen actin
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elastic filament
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hold thick filament in place, assisting muscle cell to spring back after stretching
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dystrophin
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links thin filaments to proteins of sarcolemma
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SR
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regulate Ca levels
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T tubules
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rapid telegraph system
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sliding filament theory of contraction
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thin slide past thick, more overlap
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