Final answer:
When an internal condition deviates from its set point, a negative feedback loop is activated to bring it back to equilibrium.
Step-by-step explanation:
When an internal condition deviates from its set point, a negative feedback loop is activated. Negative feedback loops are control mechanisms that help maintain homeostasis by reducing an excessive response and keeping a variable within its normal range. In this case, the negative feedback loop works to bring the internal condition back to its set point, restoring stability.