Which of the following statements is true about negative feedback inhibition?

• A. Negative feedback inhibition reduces the output or activity of a system to return to a set point.
• B. Negative feedback inhibition is primarily involved in the process of childbirth.
• C. Negative feedback inhibition amplifies the initial stimulus.
• D. Negative feedback inhibition is a rare mechanism in biological systems.

Answer: (A)

Verified step by step guidance

1. Understand the concept of negative feedback inhibition: It is a regulatory mechanism in which a change in a physiological variable triggers a response that counteracts the initial change, helping to maintain homeostasis.
2. Identify the role of negative feedback in biological systems: It is a common mechanism used to maintain stability by reducing the output or activity of a system to return to a set point.
3. Evaluate the statement about negative feedback in childbirth: Childbirth is primarily regulated by positive feedback, not negative feedback, as the process involves amplifying the initial stimulus (e.g., contractions).
4. Consider the statement about amplification of the initial stimulus: Negative feedback does not amplify the initial stimulus; instead, it works to diminish or counteract it.
5. Assess the rarity of negative feedback mechanisms: Negative feedback is not rare; it is a prevalent and essential mechanism in biological systems for maintaining homeostasis.