Which gland is often referred to as the 'master gland'?

• A. Pituitary gland
• B. Thyroid gland
• C. Adrenal gland
• D. Pancreas

Answer: (A)

The pituitary gland is often called the master gland because it serves as the central controller of the endocrine system, releasing hormones that regulate the activity of other glands throughout the body. Its anterior lobe produces hormones such as thyroid-stimulating hormone, adrenocorticotropic hormone, and the gonadotropins (follicle-stimulating hormone and luteinizing hormone), which direct the thyroid, adrenal cortex, and gonads to release their own hormones. The posterior lobe stores and releases vasopressin and oxytocin, which are important for water balance and certain reproductive functions. The pituitary itself is regulated by the hypothalamus through releasing and inhibiting hormones, placing it at the top of the hormonal control system. Other glands like the thyroid, adrenal, and pancreas perform specific tasks but do not coordinate other glands, so they aren’t described as master glands.