Hoshi was a citizen of the ancient island nation of Yamatai and a Daughter of the Sun at some point during the Kamakura period (c. 1185-1333 CE). She was chosen by Queen Himiko to be her successor.
Muscle contraction happens only when the energy molecule called adenosine triphosphate (ATP) is present. ATP has three phosphate groups that it can give away, releasing energy each time.
Cells need energy to make large molecules, like hormones. Muscle cells use ATP to produce movement. As a cell makes a hormone molecule, it breaks down molecules of ATP and uses the energy to make new bonds between smaller molecules in order to produce a larger one, explain Drs. Garrett and Grisham.