Does baby brain really exist? Answers from Myra Wick, M.D., Ph.D. There isn't enough information to support the existence of baby brain or pregnancy brain â terms used to describe the idea that pregnancy or early motherhood can harm a woman's memory and ability to think.
What two sites are involved in the production and maturation of T lymphocytes? What hormone is secreted by the thymus and stimulates the maturation of lymphocytes into T cells? Thymosin (THIGH-moh-sin) is secreted by the thymus and effects the  maturation of T-cells.
Both T and B cells are lymphocytes, white blood cells that spend most of their time in tissues and organs of the lymphatic system. They are responsible for the acquired immunes response. B cells are lymphocytes that develop in the bone marrow. T cells are lymphocytes specialized in the thymus. T and B cells make their way to lymph nodes, spleen, and other lymphatic organs via blood.