- There is an energy cost to staying alive, even at rest. All cells must expend ATP to perform routine maintenance, removing and replacing intracellular and extracellular structures and components. In addition, cells must spend additional energy doing other vital functions, such as growth, secretion, and contraction.
- A balanced diet contains all the ingredients needed to maintain homeostasis, including adequate substrates for energy generation, essential amino acids and fatty acids, minerals, vitamins and water.
