Myosin & Muscle Contraction Terms: G-actin, Tropomyosin, Troponin

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Last updated 6:40 PM on 4/5/26
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4 Terms

1
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Describe the structure of a thick myosin filament - where are the tails and heads of a myosin protein found in a thick myosin filament?

Heads - poke up all around the filament

Tails - form the core of a thick filament

<p>Heads - poke up all around the filament</p><p>Tails - form the core of a thick filament</p>
2
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Describe how G-actin, tropomyosin and the troponin complex make up the structure of a thin actin filament

G-actin: beads

Tropomyosin: rope

Troponin complex: snowman

<p>G-actin: beads</p><p>Tropomyosin: rope</p><p>Troponin complex: snowman</p>
3
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Describe the changes that occur in the following areas during skeletal muscle contraction: sarcomere, I-band, A-band, H-zone.

Sarcomere: shortens

I-band: shortens

A-band: doesn't change

H-zone: shortens

<p>Sarcomere: shortens</p><p>I-band: shortens</p><p>A-band: doesn't change</p><p>H-zone: shortens</p>
4
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