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actin (thin) filaments
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At what stage in the cross-bridge cycle is ATP split into ADP and Pi?
Before the cross bridges of myosin can attach to actin.
ADP molecules on the surface of actin serve as active sites for the formation of cross bridges with molecules of?
ATP not ADP binds to actin-myosin and is cleaved by to ADP.
What is the time in which cross bridges are active called?
contraction
Which proteins found myofilaments contains the cross bridge?
The two muscle filaments are Myosin and Actin. Myosin is the thicker of the two. When a muscle contracts, a hook like particle extends off the myosin and grabs the actin pulling it in causing the contraction/ tension of the muscle
What happens to ATP when it binds to Myosin?
Energisation of the head takes place, then cross bridge linkage follows
What does myosin attach to?
During muscle contraction, myosin cross bridges attach to active sites of ACTIN 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.
During muscle contraction myosin cross bridges attach to which active sites?
actin filaments
Cross bridges are portions of?
myosin molecules
The thick filament that has cross-bridges?
myosin
What protein with heads that attach in cross bridging?
myosin
The two filaments that form cross-bridges are?
actin and myosin
At what stage in the cross-bridge cycle is ATP split into ADP and Pi?
Before the cross bridges of myosin can attach to actin.
What acts as ATPase during the contraction cycle of muscle?
myosin cross-bridges
When myosin cross bridges bind to actin what happens?
Muscle contraction results
ADP molecules on the surface of actin serve as active sites for the formation of cross bridges with molecules of?
ATP not ADP binds to actin-myosin and is cleaved by to ADP.
Where does the heaof a myosin filament bimd to?
The head of the myosin filament "walks along" the actin filament forming cross bridges between the two.
