Insulin is a chemical that is produced by the and controls
a. pancreas . . cell growth
b. thyroid gland . . blood sugar
c. thyroid gland . . cell growth
d. pancreas . . blood sugar

Insulin is produced by the pancreas and controls blood sugar. More specifically, it helps regulate the metabolism of different food groups by encouraging the absorption of blood sugar into different cells. When insulin levels are high, glucose production by the liver is reduced, as it means there are already high blood sugar levels from food.