NEET2003ZoologyHuman Health and DiseasesActual
What is true about T-lymphocytes in mammals?
Options
- Athere are three main typescytotoxic T-cells, helper T-cells and suppressor T-cells
- Bthese originate in lymphoid tissues
- Cthey scavenge damaged cells and cellular debris
- Dthese are produced in thyroid
Correct answer
A. there are three main typescytotoxic T-cells, helper T-cells and suppressor T-cells
Step-by-step solution
T cells account for about (80 % ) of all lymphocytes. They are named T cells because they mature in the thymus, a gland found in the chest. There are three types of T cell lymphocytes: - Cytotoxic T cell - Suppressor T cell - Helper T cell Helper T cells are arguably the most important cells in adaptive immunity, as they are required for almost all adaptive immune responses. They not only help activate (B ) cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotox