Answer: b.pancreas
Step-by-step explanation:
The pancreas is an organ which is located in the upper abdomen behind the stomach. Insulin is the hormone that is released by the beta cells of the human pancreas. It is released when the glucose levels are increased in the bloodstream. The pancreas detects the rise in the blood glucose levels and hence, secretes insulin. The insulin signals the liver to take up the glucose and convert and store it as glycogen.
On the basis of the above explanation, pancreas tells the body about how much sugar should be in the blood.