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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.
Myosin cross bridges attach to active sites of?
actin filaments in muscle cells during muscle contraction.
During muscle contraction....... attach to ...............?
Troponin
What structures do the cross bridges attach during muscle action?
actin
What happens during skeletal muscle contraction?
During skeletal muscle contraction, motor neurons activate muscle fibers, causing calcium ions to be released from the sarcoplasmic reticulum. The calcium ions bind to troponin, leading to the exposure of active sites on actin filaments. Myosin heads then attach to these active sites, form cross-bridges, and pull the actin filaments towards the center of the sarcomere, resulting in muscle contraction.
What is the region where enzymes attach to their substrates?
The active site.
What is the name of the place where an enzyme and substrate attach?
the active point
Where is the region where enzymes attach to their substrates called?
The active site.
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.
What are the points of attachment for muscles in the human body?
Muscles in the human body attach to bones at specific points called insertion and origin points. Insertion points are where muscles attach to bones and move during contraction, while origin points are where muscles attach to stationary bones. These attachment points allow muscles to create movement and perform various functions in the body.
What are threads that attach the valve flaps to the ventricle walls called?
The threads that attach the valve flaps to the ventricle walls are called chordae tendineae. These fibrous cords help to prevent the valve flaps from prolapsing or collapsing back into the atria during the contraction of the ventricles.
