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During muscle contraction myosin cross bridges attach to which active sites?
actin filaments
What structures do the cross bridges attach during muscle action?
actin
What does myosin attach to?
During muscle contraction, myosin cross bridges attach to active sites of ACTIN FILAMENTS.
Myosin cross bridges attach to active sites of?
actin (thin) filaments
During skeletal muscle contraction myosin cross bridges attach to active sites of?
During skeletal muscle contraction myosin cross bridges attach to active sites of actin filaments. Actin filaments bind ATP. Their growth is regulated by thymosin and profilin.
Where do myosin cross bridges attach during muscle contraction?
Myosin functions as an ATPase utilizing ATP to produce a molecular conformational change of part of the myosin and produces movement. Movement of the filaments over each other happens when the globular heads protruding from myosin filaments attach and interact with actin filaments to form crossbridges. The myosin heads tilt and drag along the actin filament a small distance (10-12 nm). The heads then release the actin filament and adopt their original conformation.
Why are the muscles of the finger don't develop as much force as the muscles of the leg?
1. Muscles fibers with a large diameter develop more force, and have more myofibrils and more myosin heads that can attach to actin. The amount of force is dependent on the number of myosin heads attached to actin.
What are the proteins are involved in muscle contraction?
Actin and myosin
What are the names of protein filaments in a muscle fiber?
Actin Filaments
What are actin fibers?
Actin is a contractile protein fibers present in muscles.It occurs in two forms a.monomeric G actin b. polymeric F ACTIN.
When was actin discovered?
Actin was discovered by Straub in 1942.
What is the thin filament of the myocardial cell?
Actin
