What role does ATP play in muscle contraction?

Answer 1

The role ATP plays in muscle contraction is that ATP binds to sites on myosin heads, inducing a conformational change in the actin binding site and reducing the affinity for the actin substrate. Hydrolysis of ATP then cocks the myosin head and moves it closer to the z disk. Release of ADP increases the affinity of the actin binding site and a power stroke moves the head roughly 100 angstroms closer to the z disk. In short, after the power stroke, ATP is hydrolyzed to release the myosin heads from actin so that they can go to the next binding site on the actin filament. It's sort of like reloading the myosin gun.

Answer 2

ATP is the energy your body uses (food is eventually broken down to ATP). When you move your muscles, you use energy thus using ATP. A little more detail: ATP is actually used to release muscles which is why when you die your body goes into rigor (when dead you run out of ATP and your muscles cant release).

Answer 3

Adenosine Triphosphate (ATP) is the source of energy of the cells. The ATP roles in muscle construction are: hydrolysis by an ATPase activates the myosin head so it can bind to actin and rotate; binding to myosin causes detachment from actin after the power stroke; and powers the pumps that transport calcium ions from the cytosol back into the sarcoplasmic reticulum.

Answer 4

Like a lot of other functions, muscle cells require ATP to make the tissue contract. ATP can be seen as a sort of fuel that is used for many things including production of more ATP.

Answer 5

ATP gives the muscles energy to move during contraction. without it the muscle would not move

Answer 6

The release of energy from the reaction of ATP to ADP using myosin ATPase causes myosin-actin cross bridges to pull actin over myosin, thus contracting the muscle.

Answer 7

The role of ATP in muscle relaxation is to bind the myosin head which causes the myosin to detach from actin.