Select the correct text in the passage. Identify the sentence that explains the function of the effector. After meals, the amount of glucose in the blood goes up. The surrounding cells detect the higher glucose levels and signal the pancreas to secrete a hormone called insulin. Insulin enables the uptake of glucose by the cells and normalizes glucose levels in the blood. When a person’s body cannot produce enough insulin or respond to the insulin that is present, the person may be suffering from an ailment like diabetes.