Question

Which part of the endocrine system regulates blood glucose levels?
pituitary gland
hypothalamus
pancreas
adrenal medulla

Answer 1

My guess would be the pancreas, but not completely sure. Its been 2 years since I've been in anatomy

Answer 2

yep, both insulin and glucagon are released from the pancreas.

Answer 3

The pancreas is a gland organ in the digestive system and endocrine system. It is both an endocrine gland—producing several important hormones, including insulin, glucagon, somatostatin, and pancreatic polypeptide—and a digestive organ—secreting pancreatic juice containing digestive enzymes that help with the absorption of nutrients and digestion in the small intestine. These enzymes help to break down the carbohydrates, proteins, and fats.
The hormone glucagon increases the level of sugar in the blood. It plays a vital part in maintaining the correct blood sugar level. It is made by the pancreas, a gland that is part of the endocrine system and the digestive system. The pancreas releases glucagon when the blood sugar level starts to fall. Glucogon makes cells release glucose, and helps convert glycogen, the form of glucose stored in the liver, back to glucose. As a result the blood sugar level rises. Your blood has enough glucose to keep you alive for just 15 min. However, as glucose is used up, more is released to take its place
for more reading http://www.healthpages.org/anatomy-function/endocrine-system-gland/