Final answer:
The sum of all cellular processes related to building, maintaining, and supplying energy is called metabolism, which includes both anabolic and catabolic reactions.
Step-by-step explanation:
The sum of all of the cellular processes that build, maintain, and supply energy to living tissue is known as the cell's metabolism. Metabolism encompasses all the chemical reactions that occur within cells, which can be categorized into anabolic reactions that require energy to build complex molecules, and catabolic reactions that release energy by breaking down complex molecules. Energy for these processes is continually required and is replenished through consumption of food and nutrients. Bioenergetics is a term used to describe the flow of energy through living systems, and it is key to understanding how cells acquire and use energy to sustain metabolic processes.