Question

what tells the body how much sugar should be in the blood?
endorphins
thyroid gland
pancreas
pituitary gland

Explanation:

The pancreas produces insulin and glucagon which regulate blood - sugar levels. Insulin lowers blood sugar by promoting glucose uptake by cells, and glucagon raises blood sugar by stimulating the liver to release glucose. Endorphins are related to pain relief and mood, the thyroid gland regulates metabolism, and the pituitary gland is the master gland controlling other endocrine glands but not directly regulating blood - sugar levels.

Answer:

C. pancreas