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