A man has low blood glucose level. His hypothalamus detects this and triggers the pituitary gland to release hormones into the pancreas. The pancreas then secretes glucagon, which allows the glucose stored in the body to be released into the bloodstream. The release of glucose to the blood returns the blood glucose level to normal.
If your blood sugar dips too low, your pancreas releases glucagon to tell your liver to make more glucose. Glucagon can also play a role in how amino acids (compounds that help make up muscles and tissue in your body) make glucose.