Which gland secretes hormones that stimulate the production of T lymphocytes?

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

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the role of T lymphocytes in the immune system. T lymphocytes, also known as T cells, are a type of white blood cell that play a critical role in adaptive immunity by identifying and attacking pathogens.
2. Step 2: Learn about the gland responsible for T lymphocyte production. The thymus gland is a specialized organ of the immune system located in the upper chest, behind the sternum. It is primarily responsible for the maturation and differentiation of T lymphocytes.
3. Step 3: Compare the functions of the glands listed in the problem. The pituitary gland regulates various hormones but does not directly influence T lymphocyte production. The adrenal gland produces hormones like cortisol and adrenaline, which are involved in stress response, not T cell production. The thyroid gland regulates metabolism and calcium levels but does not contribute to T lymphocyte development.
4. Step 4: Focus on the thymus gland. The thymus secretes hormones such as thymosin, which are essential for the development and maturation of T lymphocytes. This process is critical for the immune system's ability to respond to infections.
5. Step 5: Conclude that the thymus gland is the correct answer based on its unique role in T lymphocyte production and immune system function.