Which of the following is correct regarding a feedback cycle?

• A. Positive feedback loops are more common in the body than negative feedback loops.
• B. Negative feedback loops help maintain homeostasis by reducing the effect of changes.
• C. Negative feedback loops amplify changes and move the system away from equilibrium.
• D. Positive feedback loops help maintain homeostasis by counteracting changes.

Answer: (B)

Verified step by step guidance

1. Understand the concept of feedback loops: Feedback loops are biological mechanisms that help maintain stability or homeostasis in the body. They can be either positive or negative.
2. Identify the characteristics of negative feedback loops: Negative feedback loops work to reduce or counteract changes, helping to maintain equilibrium or homeostasis. They are more common in the body than positive feedback loops.
3. Identify the characteristics of positive feedback loops: Positive feedback loops amplify changes and move the system away from equilibrium. They are less common and are typically used in processes that need a definitive endpoint, such as childbirth.
4. Evaluate the statements given in the problem: Compare each statement with the characteristics of positive and negative feedback loops to determine which is correct.
5. Conclude that the correct statement is: 'Negative feedback loops help maintain homeostasis by reducing the effect of changes.' This aligns with the definition and function of negative feedback loops in the body.