Diabetes mellitus is a disease of sugar balance. in type 1 diabetes, the body's immune system gradually destroys the cells that produce insulin. in type 2 diabetes, the body's cells become less responsive to the hormone insulin. insulin plays a vital role in carbohydrate metabolism. what is its role? choose the answer that best describes the role of insulin:
a. insulin controls the rate of carbohydrate digestion; without insulin, less sugar enters the blood.
b. insulin is needed for cells to metabolize glucose; without insulin, cells will fill with unused glucose.
c. insulin is needed for cells to pick up glucose from the blood; without insulin, more glucose will remain in the blood.
d. insulin is necessary for digested carbohydrates to be absorbed from the digestive tract into the blood; without insulin, less sugar enters the blood.