Glucose molecules from food sources provide energy to the cells of the human body. After a person eats, the level of glucose in their blood increases.

If a person's blood glucose level becomes too high, a hormone in the pancreas, known as insulin, is released. Insulin helps move glucose out of the bloodstream. This causes the blood glucose level to decrease and return to equilibrium.

The production of insulin is a mechanism that regulates the human body's internal environment and aids in
A.
the storage of genetic information within cells.
B.
the production of carbon dioxide through cellular respiration.
C.
the production of sugar molecules through photosynthesis.
D.
the maintenance of homeostasis within the body system.