Final answer:
Cells require a constant energy supply to maintain homeostatic disequilibrium. They achieve a steady state where the rate of input and output of energy and matter is balanced. This allows cells to perform their functions and maintain internal environments different from their external environments.
Step-by-step explanation:
Growth, reproduction, and dynamic homeostasis require cells to create and maintain internal environments that are different from their external environments. In order for cells to maintain this disequilibrium, they constantly require a supply of energy. Although cells do not reach chemical equilibrium, they do achieve a steady state where the rate of input of energy and matter equals the rate of output. This ensures that cells have the necessary energy to perform their functions and maintain homeostasis.