What problems would a person most likely have if his pancreas was not working correctly

A direct connection exists between the pancreas and diabetes. The pancreas is an organ deep in your abdomen behind your stomach. It’s an important part of your digestive system. The pancreas produces enzymes and hormones that help you digest food. One of those hormones, insulin, is necessary to regulate glucose. Glucose refers to sugars in your body. Every cell in your body needs glucose for energy. Think of insulin as a lock to the cell. Insulin must open the cell to allow it to use glucose for energy.

Explanation:

Each type of diabetes involves the pancreas not functioning properly. The way in which the pancreas doesn’t function properly differs depending on the type. No matter what type of diabetes you have, it requires ongoing monitoring of blood glucose levels so you can take the appropriate action.