Which hormone plays an important role in the regulation of blood glucose levels?

• A. Cortisol
• B. Aldosterone
• C. Insulin
• D. Thyroxine

Answer: (C)

Verified step by step guidance

1. Step 1: Begin by understanding the role of hormones in the regulation of blood glucose levels. Hormones are chemical messengers that help maintain homeostasis in the body, including blood sugar levels.
2. Step 2: Review the function of insulin. Insulin is a hormone produced by the beta cells of the pancreas. Its primary role is to lower blood glucose levels by facilitating the uptake of glucose into cells and promoting its storage as glycogen in the liver and muscles.
3. Step 3: Compare insulin with other hormones listed in the problem. Cortisol, for example, is a stress hormone that increases blood glucose levels by stimulating gluconeogenesis (the production of glucose from non-carbohydrate sources). Aldosterone regulates sodium and potassium balance, not blood glucose. Thyroxine, a thyroid hormone, influences metabolism but does not directly regulate blood glucose.
4. Step 4: Recognize that insulin is the correct answer because it directly regulates blood glucose levels by lowering them, whereas the other hormones listed have different primary functions.
5. Step 5: Conclude that understanding the specific roles of hormones is essential for identifying their impact on physiological processes like blood glucose regulation.