[Answer] . During muscle contractions myosin motor proteins move across tracks of _________________

Answer: microfilaments
. During muscle contractions myosin motor proteins move across tracks of _________________
The best prominent example of a motor protein is the muscle protein myosin which “motors” the contraction of muscle fibers in animals. Motor proteins are the driving force behind most active transport of proteins and vesicles in the cytoplasm. …
The sliding filament theory explains the mechanism of muscle contraction based on muscle proteins that slide past each other to generate movement . According to the sliding filament theory the myosin (thick) filaments of muscle fibers slide past the actin (thin) filaments during muscle contraction while the two groups of filaments remain at relatively constant length.
During muscle contraction the heads of the myosin filaments attach to oppositely oriented thin filaments actin and pull them past one another. The action of myosin attachment and actin movement results in sarcomere shortening. Muscle contraction consists of the simultaneous shortening of multiple sarcomeres. Muscle fiber contraction
Myosin – Wikipedia
Sliding filament theory – Wikipedia
Tropomyosin – Wikipedia
Myosin II (also known as conventional myosin ) is the myosin type responsible for producing muscle contraction in muscle cells in most animal cell types. It is also found in non- muscle cells in contractile bundles called stress fibers.. Myosin II contains two heavy chains each about 2000 amino acids in length which constitute the head and tail domains. . Each of these heavy …
The thin filament is made of the skeletal muscle isoforms of actin. Each myosin protein ‘paddles’ along the thin actin filament repeatedly binding to myosin-binding sites along the actin filament ratcheting and letting go. In effect the thick f…

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