Insulin plays a vital role in carbohydrate metabolism. What is its primary role in blood sugar homeostasis?

• A. Stimulating the release of glucagon from the pancreas
• B. Increasing blood glucose levels by promoting glycogen breakdown
• C. Inhibiting the conversion of glucose to glycogen in the liver
• D. Decreasing blood glucose levels by facilitating cellular glucose uptake

Answer: (D)

Verified step by step guidance

1. Understand the role of insulin in the body: Insulin is a hormone produced by the pancreas that helps regulate blood glucose levels.
2. Recognize the process of blood sugar homeostasis: This involves maintaining stable blood glucose levels within a narrow range, which is crucial for normal body function.
3. Identify the primary function of insulin: Insulin facilitates the uptake of glucose into cells, particularly muscle and fat cells, which decreases blood glucose levels.
4. Differentiate insulin's action from other hormones: Unlike glucagon, which increases blood glucose levels by promoting glycogen breakdown, insulin works to lower blood glucose levels.
5. Conclude that insulin's primary role in blood sugar homeostasis is decreasing blood glucose levels by facilitating cellular glucose uptake, ensuring cells receive the energy they need while maintaining balance in the bloodstream.