Which type of feedback begins as a response to a change in the internal environment?

• A. Positive feedback mechanisms.
• B. Negative feedback mechanisms.
• C. Both positive and negative feedback begin this way.
• D. Neither positive nor negative feedback begin this way.

Answer: (C)

Verified step by step guidance

1. Understand the concept of feedback mechanisms: Feedback mechanisms are processes that help maintain homeostasis in the body by responding to changes in the internal environment.
2. Identify the types of feedback mechanisms: There are two main types of feedback mechanisms - positive feedback and negative feedback.
3. Define negative feedback: Negative feedback mechanisms work to counteract changes in the internal environment, bringing the system back to its set point. For example, if body temperature rises, mechanisms are activated to lower it.
4. Define positive feedback: Positive feedback mechanisms amplify changes in the internal environment, moving the system further away from its set point. An example is the release of oxytocin during childbirth, which intensifies contractions.
5. Determine the initial response: Both positive and negative feedback mechanisms begin as a response to a change in the internal environment, aiming to either counteract or amplify the change.