How do plant and animal systems function?

If I am the answer, what is the question?

Below are a list of answers. Your task is to come up with a question for that answer.

1. Islets of Langerhan

2. Glycogen

3. Liver

4. Insulin

5. Glucagon

6. Blood glucose meter

7. Thirsty, hungry, tired

8. Early onset

9. Obesity