Final answer:
Insulin release is likely responsible for the change in glucose concentration in the blood between 0 and 30 mins.
Step-by-step explanation:
When blood glucose levels are high, the beta cells of the pancreas release insulin, which helps reduce blood glucose levels by converting excess glucose into glycogen in the liver. This process is known as glycogenesis. Insulin also promotes glucose uptake by cells, which enhances the utilization of glucose for energy production.
On the other hand, when blood glucose levels are low, the alpha cells of the pancreas release glucagon. Glucagon stimulates the breakdown of glycogen into glucose, a process called glycogenolysis, which increases blood glucose levels.
Therefore, the change in glucose concentration in the blood between 0 and 30 minutes is likely due to the release of insulin as a response to high blood glucose levels.