Which type of feedback loop is used to complete a process once it is triggered?

• A. Reinforcing feedback loop
• B. Positive feedback loop
• C. Neutral feedback loop
• D. Negative feedback loop

Answer: (B)

Verified step by step guidance

1. Understand the concept of feedback loops in physiology: Feedback loops are mechanisms that help maintain homeostasis in the body by regulating physiological processes.
2. Differentiate between positive and negative feedback loops: Negative feedback loops work to reverse a change and bring the system back to its set point, while positive feedback loops amplify a change and drive the process to completion.
3. Identify examples of positive feedback loops: Common examples include childbirth, where the release of oxytocin intensifies contractions, and blood clotting, where the activation of clotting factors accelerates the process.
4. Recognize the characteristics of a positive feedback loop: It is self-amplifying and leads to a rapid change in the system, often completing a process once it is triggered.
5. Apply this understanding to the question: Since the question asks for a feedback loop that completes a process once triggered, the correct answer is a positive feedback loop.