Which endocrine gland secretes several hormones that stimulate lymphatic organs and T cell activity?

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

Answer: (A)

Verified step by step guidance

1. Identify the function of each gland listed in the options. For example, the adrenal gland is involved in stress response, the pituitary gland regulates various hormones, the pineal gland controls circadian rhythms, and the thymus is associated with the immune system.
2. Understand the role of the thymus gland in the immune system. It secretes hormones like thymosin, which are crucial for the development and activity of T cells (a type of white blood cell).
3. Recall that T cells are essential for adaptive immunity, and their maturation occurs in the thymus. This makes the thymus a key player in stimulating lymphatic organs and T cell activity.
4. Eliminate the other options based on their primary functions. For example, the adrenal gland secretes hormones like cortisol and adrenaline, which are unrelated to T cell activity. Similarly, the pituitary gland and pineal gland do not directly influence lymphatic organs or T cells.
5. Conclude that the correct answer is the thymus, as it is the endocrine gland responsible for secreting hormones that stimulate lymphatic organs and T cell activity.