Question

Following are the examples of negative feedback system except:

• A. Body temperature regulation
• B. Blood glucose maintenance
• C. Blood clotting
• D. Blood pressure maintenance

Hint:

Negative feedback maintains homeostasis by reversing changes, whereas positive feedback amplifies a process until its goal is achieved, such as in blood clotting.

Answer 1

The Correct Option is C

Step 1: Understanding negative feedback systems. A negative feedback system works to maintain homeostasis by counteracting changes in physiological parameters. 
For instance: 
- Body temperature regulation: Uses mechanisms like sweating and shivering to restore temperature balance.
- Blood glucose maintenance: Involves insulin and glucagon to regulate blood sugar levels. 
- Blood pressure maintenance: Adjusts heart rate and vessel dilation to stabilize blood pressure. 

Step 2: Positive feedback in blood clotting. Blood clotting is an example of a positive feedback system. Once a clot begins to form, it releases signals that amplify clotting activity until the process is complete, which is opposite to negative feedback mechanisms. 

Step 3: Why other options are correct examples of negative feedback. - Body temperature, blood glucose, and blood pressure regulation are all examples of negative feedback systems, where deviations are corrected to maintain balance.