Which of the following statements about feedback loops is false?

• A. Negative feedback loops typically reinforce the initial stimulus, leading to greater instability.
• B. Positive feedback loops amplify changes and can lead to a rapid departure from homeostasis.
• C. Negative feedback loops help maintain homeostasis by reversing a change in a controlled condition.
• D. Positive feedback loops are less common in the body than negative feedback loops.

Answer: (A)

Verified step by step guidance

1. Understand the concept of feedback loops: Feedback loops are mechanisms the body uses to maintain homeostasis. They are categorized into negative feedback loops and positive feedback loops.
2. Clarify negative feedback loops: Negative feedback loops work to reverse a change in a controlled condition, bringing the system back to its set point. For example, if body temperature rises, mechanisms like sweating are activated to cool the body down.
3. Clarify positive feedback loops: Positive feedback loops amplify the initial stimulus, leading to a greater change in the same direction. These loops are less common and are typically used in processes like childbirth (oxytocin release) or blood clotting.
4. Analyze the statements: Review each statement in the problem and compare it to the definitions of negative and positive feedback loops. Identify which statement contradicts the established definitions.
5. Identify the false statement: The false statement is the one that incorrectly describes negative feedback loops as reinforcing the initial stimulus, which is actually a characteristic of positive feedback loops.