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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.
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.
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
What contains contractile elements which generate tension during a muscle contraction?
Contractile elements that generate tension during a muscle contraction are primarily found within muscle fibers, specifically in the myofibrils. These myofibrils contain organized structures called sarcomeres, which are made up of thick (myosin) and thin (actin) filaments. When a muscle is stimulated to contract, the myosin heads attach to the actin filaments and pull them, resulting in the shortening of the sarcomere and overall muscle contraction.
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 part of the muscle applies to the midsection of the muscle between the two attached sections?
The part of the muscle that applies to the midsection between the two attached sections is called the belly or gaster. This is the fleshy, central portion of the muscle that is typically responsible for contraction. The ends of the muscle, which attach to bones, are known as the origin and insertion, while the belly is the main area that generates force during muscle contraction.
