Final answer:
Insulin is a hormone that regulates blood glucose levels. It promotes glucose absorption into cells and storage of excess glucose. Low insulin levels lead to high blood glucose levels in diabetes.
Step-by-step explanation:
Insulin is a hormone that regulates blood glucose levels. When the blood glucose level is high, insulin is released and allows cells to utilize blood glucose and store excess glucose for later use. It promotes glucose absorption into liver, fat, and muscle cells, converting it into glycogen or fats. Insulin also inhibits the production of glucose by the liver. On the other hand, low insulin levels result in high blood glucose levels, as seen in diabetes.