Calcium and ATP are cofactors (nonprotein components of enzymes) required for the contraction of muscle cells. ATP supplies the energy, as described above, but what does calcium do? Calcium is ...

Calcium release triggers muscle contraction, but this can only happen after an electrical impulse from the nervous system. When the proteins interact, they can use ATP (a cellular energy source ...

Impulses from nerve cells control the contraction of each muscle ... many fibers are present. To fuel a muscle, the body makes adenosine triphosphate (ATP), which muscle cells turn into mechanical ...

ATP (adenosine triphosphate) is the energy-carrying molecule used in cells because it can release energy very quickly. Energy is released from ATP when the end phosphate is removed. Once ATP has ...

more efficient at using oxygen to generate more ATP for continuous, extended muscle contractions) and is lower in older people. even after repeated injury, the concentration of satellite cells is ...

When a cardiac muscle cell contracts, the myosin filament pulls the actin filaments toward each other, which causes the cell to shrink. The cell uses ATP to power this contraction. A single myosin ...

Creatine is a natural substance that helps supply energy to muscles. Creatinine is a waste product produced when creatine is broken down. Rhabdomyolysis, or "rhabdo," occurs when excessive ...

You'll find it in your muscles. But it's mostly there in a different form called phosphocreatine or creatine phosphate. Phosphocreatine helps you make adenosine triphosphate (ATP), which is a ...

Mahadevan, a professor of physics at Harvard University, created a theoretical model of water's role in muscle contraction ...