Anatomy of a Sarcomere
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Last updated 6:29 AM on 12/9/25
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14 Terms
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What can muscles do?
Contract & Relax
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What happens when something contracts?
It shortens
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What is myosin
Thick myofilament
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What does myosin have?
“Heads” to bind to actin
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What is actin?
Thin Myofilament
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What is actin known as?
“Two strands of pearls”
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What is the Z-line?
Boundary between sarcomeres
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What is the M-line?
“middle line”
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What does the M-line do?
Holds together the myosin Myofilaments
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What are I-bands?
Light bands
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What do I-bands contain?
Contains only thin (actin) filaments
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What does the H-zone contain?
Only thick (myosin) filaments
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What is the A-band?
Dark band
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What does the A-band contain?
The entire length of a thick (myosin) filament
Note 
Flashcards (84)