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Troponin
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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.
During muscle contraction myosin cross bridges attach to which active sites?
actin filaments
Myosin cross bridges attach to active sites of?
actin filaments in muscle cells during muscle contraction.
Does the Z line shorten during muscle contraction?
Yes, the Z line shortens during muscle contraction.
The muscle decreases in muscle length during contraction but tension is the same?
Isotonic contraction
Where does ATP attach during muscle contraction?
During muscle contraction, ATP attaches to the myosin heads of the thick filaments in the muscle fibers. When ATP binds to myosin, it causes the myosin head to detach from the actin filament, allowing for a new cycle of cross-bridge formation and muscle contraction to occur. The hydrolysis of ATP then provides the energy necessary for the myosin head to pivot and pull the actin filament, leading to muscle shortening.
What muscle contraction occurs in the biceps brachii during the upward phase of the bicep curl?
a concentric contraction- a concentric contraction involves the muscle length, shortening during a contraction! YA-trick-YA!
What happens to the Z line during muscle contraction?
During muscle contraction, the Z line moves closer together, causing the muscle to shorten and generate force.
What happens to a muscle contraction if there is an excess amount of either Ca2 plus or ATP present during the contraction?
During muscle contraction the actin heads pull the sarcomere closed
What is a cross bridge in a muscle contraction?
A cross bridge in muscle contraction refers to the temporary connection formed between the myosin heads of thick filaments and the actin filaments of thin filaments within a muscle fiber. This interaction occurs during the contraction cycle when calcium ions bind to troponin, causing tropomyosin to shift and expose binding sites on actin. The myosin heads then attach to these sites, pulling the actin filaments toward the center of the sarcomere, which leads to muscle shortening and contraction. This process is a key component of the sliding filament theory of muscle contraction.
In addition to myosin what other protein is involved in skeletal muscle contraction?
Myosin acts with Actin during muscle contraction
