Oregon Certified Nursing Assistant State Practice Exam

Which organ is primarily involved in hormone regulation of metabolism?

1. Thyroid

2. Liver

3. Pancreas

4. Adrenal glands

The correct answer is: Thyroid

The thyroid gland is primarily involved in the regulation of metabolism through the production and secretion of thyroid hormones, such as thyroxine (T4) and triiodothyronine (T3). These hormones play a crucial role in controlling the metabolic rate, influencing how the body converts food into energy. The thyroid hormones affect various bodily functions, including heart rate, temperature regulation, and the utilization of carbohydrates, fats, and proteins. While other organs mentioned, like the pancreas, liver, and adrenal glands, also play significant roles in metabolism and hormones, their primary functions differ. The pancreas mainly regulates blood sugar levels through insulin and glucagon. The liver is vital for detoxification, metabolism, and nutrient storage, and the adrenal glands produce hormones involved in stress response and metabolism. However, when specifically considering hormone regulation of metabolism, the thyroid gland stands out as the central player in this process.