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.
More on T Lymphocytes â¢ Develop in the thymus. â¢ Cells with a CD4 marker are called helper T cells (Th cells). â¢ CD8 marker positive cells are cytotoxic T cells (Tc cells). â¢ Each T cell has a TCR to recognize antigen: â a transmembrane heterodimer composed of two polypeptide chains.