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Multiple Choice

How is homeostasis achieved and illustrated by a negative feedback loop?

Negative feedback keeps internal conditions stable by counteracting any deviation from a set point. When a variable such as body temperature rises, sensors detect the change and trigger responses (like sweating and heat loss) that oppose the increase. As cooling occurs, the stimulus weakens and the system returns toward normal, illustrating homeostasis in action. This is best described by a mechanism that reduces the original disturbance to regain balance. The other ideas miss this core idea: growing a change instead of dampening it (positive feedback), or suggesting temperature isn’t involved or that fluctuations are ignored, which aren’t how homeostatic control works.

Negative feedback keeps internal conditions stable by counteracting any deviation from a set point. When a variable such as body temperature rises, sensors detect the change and trigger responses (like sweating and heat loss) that oppose the increase. As cooling occurs, the stimulus weakens and the system returns toward normal, illustrating homeostasis in action.

This is best described by a mechanism that reduces the original disturbance to regain balance. The other ideas miss this core idea: growing a change instead of dampening it (positive feedback), or suggesting temperature isn’t involved or that fluctuations are ignored, which aren’t how homeostatic control works.