What is the purpose of positive feedback in biological processes?

Positive feedback in biological processes serves to amplify a response until a particular process is completed. This mechanism is crucial in scenarios where a rapid change or a decisive event is necessary. For example, during childbirth, the hormone oxytocin is released, which intensifies contractions. This increase in contractions leads to even more oxytocin being released, creating a loop that continues until the baby is born.

In contrast to maintaining stability or neutralizing reactions, which are functions of negative feedback mechanisms, positive feedback drives processes forward, resulting in a decisive outcome. This amplifying effect is vital in situations that require a swift and significant response, rather than simply slowing or stopping an ongoing process.