Question

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

Explanation:

The pancreas produces insulin and glucagon which regulate blood - sugar levels. The thyroid gland is involved in metabolism regulation and the pituitary gland is the master gland controlling other endocrine glands but not directly regulating blood sugar/insulin levels.

Answer:

the pancreas