In which type of feedback does the response enhance the original stimulus?

Positive feedback occurs when the response enhances or amplifies the original stimulus, creating a cycle that drives a process to completion. This type of feedback is characterized by the effect being added to the initial stimulus, pushing the system further away from its starting state. A common example of positive feedback in the human body is the process of childbirth, where the release of oxytocin increases contractions, which in turn leads to more oxytocin being released.

In contrast, negative feedback works to counteract a change and return a system to its set point, stabilizing it. Neutral feedback is not commonly referenced in biological systems, as it doesn't significantly affect the response or original stimulus. Regulatory feedback is a broad term that may not specifically fit into the positive or negative categories, making it less applicable in this context. Therefore, the focus on positive feedback clearly identifies it as the mechanism where the response enhances the original stimulus.