Negative Feedback - GCSE Biology Definition

Negative feedback is a process in the body that helps maintain stable internal conditions (homeostasis), like a thermostat keeping a room at the right temperature. In GCSE Biology, this system is important for controlling factors such as body temperature, blood glucose levels, and water balance. When a condition in the body moves away from the normal level, the change is detected and responses are triggered to bring it back to normal. For example, if the body becomes too hot, negative feedback mechanisms (such as sweating and vasodilation) help to cool it down. It acts as a loop that constantly monitors and adjusts internal conditions to keep them within a healthy range.