Mice are common subjects for medical experiments because the responses of their body systems are very similar to human responses. A scientist is planning an experiment to investigate homeostasis in mice. The steps of the procedure are listed below. The procedure involves mice that have not eaten for 24 hours.

1. Divide the mice into two groups, labeled A and B.

2. Take a blood sample from each mouse. Measure the levels of blood glucose and insulin.

3. Feed the mice in Group A a high-sugar food, such as candy bars. Do not feed the mice in Group B.

4. Repeat Step 2 of the procedure.

5. Repeat Step 2 again, every 5 minutes for 1 hour.

After the mice in Group A are fed, which of these events helps to maintain homeostasis in the bodies of the mice?