Final answer:
Homeostasis is the ability of a system to maintain internal balance and stability, adjusting to maintain equilibrium despite external changes.
Step-by-step explanation:
The term in system theory that refers to the ability of a system to maintain stability and balance within its internal environment is homeostasis. Homeostasis is the process by which biological systems make constant adjustments to maintain a stable internal condition, or equilibrium, despite changing external or internal environments. This regulation ensures that bodily functions and cellular processes remain within a certain range, facilitating the maintenance of life.
Under homeostatic regulation, deviations from a set point or normal range are minimized or corrected, allowing organisms to function effectively. For example, human beings maintain a stable internal body temperature, and when facing cold outside temperatures, the body will act to keep its core temperature constant through various physiological mechanisms.