Which gland is located in the neck and regulates metabolism?

• A. Thyroid
• B. Pancreas
• C. Liver
• D. Spleen

Answer: (A)

Metabolism is controlled by hormones from glands, with the thyroid playing a central role in setting the body’s overall metabolic rate. This gland sits in the neck, just below the larynx, and has a butterfly shape that wraps around the front of the trachea. It releases thyroid hormones (T3 and T4) into the bloodstream, and these hormones tell nearly every cell how fast to burn calories and produce energy. That broad influence explains why thyroid activity affects temperature, heart rate, energy levels, and how quickly you metabolize nutrients.

The other organs listed have important metabolic functions too, but their main roles and locations differ: the pancreas mainly regulates blood glucose; the liver handles many metabolic processes but isn’t located in the neck; the spleen has immune and blood-filtering roles and is located in the upper abdomen. When you think of a gland in the neck that regulates metabolism, the thyroid is the one.