Final answer:
Alpha cells in the pancreas produce glucagon to increase blood glucose levels, while beta cells produce insulin to decrease blood glucose levels.
Step-by-step explanation:
In the pancreas, alpha cells produce glucagon, which serves to increase the amount of glucose in the blood by stimulating the liver to convert glycogen into glucose.
The beta cells produce insulin, which serves to decrease the blood glucose level by promoting the absorption of glucose into fat, liver, and skeletal muscle cells, where it is converted into glycogen or fats.