striations & sarcomeres

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Last updated 2:11 PM on 4/2/26
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6 Terms

1
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striations

-alternating A-bands (dark) & I bands (light)

2
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A-band

-dark band with myosin 🖤

-thick filaments

-binds to M line

3
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H band

-not as dark

-thick filaments

4
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I-band

-light band

-no myosin

-thin filaments

5
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sacromere

-contractile unit of muscle fiber

-boundaries → segment located between two z discs / z lines

6
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acethycholine

-used for muscle contraction