Human Anatomy: Ch.10

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Health

HumanAnatomy

University/Undergrad

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9 Terms

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Excitability
irritability; ability to respond to stimulus
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Conductivity
ability of a muscle to transmit electrical signal along membrane
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Contractility
Ability to shorten
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Extensibility
ability to lengthen
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Elasticity
ability to return to resting length
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Structural hierarchy of skeletal muscle
whole muscle → Muscle fascicle → muscle fiber → myofibrils → myofilaments
whole muscle → Muscle fascicle → muscle fiber → myofibrils → myofilaments
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What do muscle fiber contain?
myofibrils
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what are myofibrils are composed of?
myofilaments
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thin filaments
composed of actin, tropomyosin, and troponin