ATP. The potential energy is stored in the high-energy phosphate bonds due to the negative charges of each phosphate repulsing each other. Cells break the phosphate-phosphate bonds when they use ATP, so the released energy is used to do kinetic work.
Water will move in and out of the cell.
Answer:
The vertical colloumns in the periodic table, they're called groups/families because of similar chemical behavior
It is necessary to increase oxygen delivery in order to maintain sustained ATP production.