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Muscle Structures

Describes the different parts within muscles and muscle contraction.

TermDefinition
Z disks the lateral borders of sarcomeres and are the smallest functional units in striated muscle.
Actin A contractile protein that makes up the microfilaments in muscles.
Troponin A regulatory protein that lays within the Actin. it also binds with calcium during muscle contraction to allow the muscle to contract.
Tropomyosin A regulatory protein that stabilizes actin filament allowing your muscles to relax.
Myosin A contractile protein in the center of the sarcomere.
Titin An accessory protein that allows muscles to recoil when they relax and prevents muscles from over stretching.
Sarcomere The basic contractile unit of muscle fiber.
I-Band the zone of thin filaments that is not superimposed by myosin
H-Band the zone of the thick filaments that has no actin.
M Line appears in the middle of the sarcomere formed of cross-connecting elements of the cytoskeleton
Created by: Otobias
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