Final answer:
Feedback mechanisms that maintain homeostasis include insulin secretion in response to high blood sugar, proton pumping to maintain pH level, and increased heart rate due to exercise. These mechanisms either act to return the body to a set point or to adjust to changes in the body's needs.
Step-by-step explanation:
Maintaining homeostasis is crucial for organisms, and feedback mechanisms are biological processes that help maintain a stable internal environment. Examples of these mechanisms include:
- Negative feedback mechanisms, which work to correct a deviation from a set point and return the system to homeostasis. When blood glucose levels rise, insulin secretion in response to high blood sugar helps lower it back to the normal range, exemplifying negative feedback.
- Proton pumping helps maintain a proper pH level in cells, which is another form of homeostasis.
- Increased heart rate in response to exercise is a feedback mechanism that helps meet the body's increased demand for oxygen and nutrients during physical activity.
Other options listed, such as flagellar rotation, antibodies binding to a virus, and protein synthesis, do not serve as feedback mechanisms for homeostasis. Instead, they are more involved in processes like locomotion, immune response, and cell function respectively.