Negative Feedback Loop

Figure 1. Negative feedback loop

Figure 2. Temperature regulation

Negative feedback loops are common in nature as they keep processes from getting out of control. The basic idea to think of a circular process which everytime it completes a loop it degrades the entire process a little, this degradation leads to a self correcting mechanism. This might be animal overpopulation in an area which reduces food, which causes starvation, which causes population decrease, which means less mouths to be fed, or just the feedback loops in blood glucose regulation (see Figure 1) or mammalian temperature regulation (see Figure 2).