For further information, see PostâWorld War II baby boom. Baby boomers are the demographic group born during the postâWorld War II baby boom, approximately between the years 1946 and 1964. This includes people who are between 53 and 71 years old in 2017, according to the U.S. Census Bureau.
ATP transports chemical energy within cells for metabolism. It is one of the end products of photophosphorylation, cellular respiration, and fermentation and used by enzymes and structural proteins in many cellular processes, including biosynthetic reactions, motility, and cell division.TP is therefore continuously recycled in organisms: the human body, which on average contains only 250 grams (8.8 oz) of ATP, turns over its own body weight equivalent in ATP each day.
Energy is required for cells to perform many functions. Enzymes convert substrates into products but must do so against the activation energy (so energy is needed here). Cellular respiration requires some amount of energy to occur. The most important energy consumer is the Na+/K+ ATPase ion pump which is responsible for maintaining cellular gradients and consumes approximately 50% of the energy of the cell.