Final answer:
Following the breakdown of molecules such as glucose, cells release and use energy for cellular processes, including cellular respiration and various metabolic reactions.
Step-by-step explanation:
After cells break down molecules like glucose, the energy that was used to hold these molecules together is released. This energy is then utilized by the cells to perform various forms of work, such as cellular respiration and movement. Bioenergetics describes this energy flow through living systems. Cellular processes like the building and breaking down of complex molecules occur through a series of chemical reactions. These are collectively known as the cell's metabolism, which includes both anabolic and catabolic reactions. Anabolic reactions require energy to synthesize complex molecules from simpler ones, while catabolic reactions release energy when complex molecules are broken down.
Additionally, cells engage in cellular respiration, a process where the energy in food is converted into a form that can be used by the body's cells. For instance, the simple sugar glucose, derived from the food we eat, is a primary substrate for cellular respiration. Through this process, cells extract energy to support vital functions and produce byproducts like carbon dioxide and water.