The proper supply of nutrients essential for growth, reproduction, repair, immunity, and energy catabolism 2.the conversion of nutrients into energy anabolism 3.cell converts nutrients into energy or materials for growth, repair, reproduction, and maintenance enzyme 4.the process by which the cell uses nutrients to repair or build new tissues metabolism 5.chemical substances that are absorbed by the body through the process of digestion nutrition 6.molecule responsible for facilitating biochemical reactions within the body nutrients