Is raise in body temperature positive or negative feedback – [Free] B45
Is raise in body temperature positive or negative feedback
Homeostasis and Body Temperature Regulation
Question:
Is a rise in body temperature an example of positive or negative feedback? Explain your answer.
Answer with Detailed Explanation:
Step 1: Understanding the Concept of Feedback
In physiology, feedback mechanisms help the body maintain internal stability (homeostasis).
- Negative Feedback: The body responds to a change by initiating mechanisms that oppose the change and bring the system back to normal.
- Positive Feedback: The response amplifies or increases the change, moving further away from equilibrium.
Step 2: Analyzing the Response to Rising Body Temperature
When the body temperature rises above the normal set point (around 37°C), the brain—specifically the hypothalamus—detects this increase.
The body then initiates responses that work to cool the body down:
- Vasodilation: Blood vessels near the skin surface widen, increasing heat loss.
- Sweating: Evaporative cooling helps reduce body temperature.
- Behavioral Changes: Such as removing clothing or seeking shade.
Step 3: Classification of the Feedback
All the above mechanisms are triggered to counteract the rise in temperature. This clearly illustrates a negative feedback loop, where the response works to reverse the original change.
Final Answer:
A rise in body temperature triggers a negative feedback mechanism in the body.
This helps maintain homeostasis by bringing the temperature back to normal.