What is the function of positive feedback in biological systems?

In biological systems, positive feedback serves to amplify a response or increase the output of a process. This is particularly important during certain critical physiological events where a rapid and decisive change is necessary. For example, during childbirth, the release of oxytocin enhances contractions in the uterus, which in turn stimulates more oxytocin release, reinforcing the effect until the baby is born.

The role of positive feedback is to push a process toward completion rather than balance it out, which is what happens with negative feedback mechanisms. In positive feedback, the initial stimulus is reinforced rather than diminished, leading to a greater response until a specific outcome is achieved. This mechanism is crucial in processes that need to be completed swiftly and efficiently.