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10 Cards in this Set
- Front
- Back
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How do the striated patterns arise?
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Arrangmenet of numerous thick and thin filaments in a regular array within the cytoplasm
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What are myofibrils?
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cylindrical bundles composed of multiple sarcomeres
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Most of the cytoplasm of a fiber is filled with what?
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myofibrils
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What is the repeating unit in a myofibril?
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Sarcomere
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What are thick filaments composed of?
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the protein myosin
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What are thin filaments composed of?
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actin, troponin and tropomysosin
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What serves to maintain the alignment of thick filaments in the middle of each sarcomere?
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the M-line lnkage between thick filaments and the titan filaments
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Each thick filament is surrounding be how many thin filaments and each thing filaments is surrounded by how many thick filaments
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Thick Filament: Hexagonal arrangement of 6 thin filaments
Thin Filament: Triangular arrangement of 3 thick filaments |
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In the region of filament overlap, what is the ration of thin filament:thick filament?
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2:1
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What are cross bridges?
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portions of myosin molecules that extend from the surface of the thick filaments toward the thin filaments
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