Final answer:
The pancreas secretes two primary hormones: insulin and glucagon, which regulate blood glucose levels by lowering and raising it, respectively.
Step-by-step explanation:
The two major hormones secreted by the pancreas are insulin and glucagon. These hormones are produced by the different types of cells within the islets of Langerhans, which are clusters of endocrine cells located in the pancreas. Specifically, the alpha cells produce glucagon, which raises blood glucose levels by causing the liver to convert stored glycogen into glucose. Conversely, the beta cells produce insulin, which lowers blood glucose levels by facilitating the uptake of glucose into the body's cells and the storage of glucose as glycogen in the liver and muscle tissue.