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T cell undergoes maturation in the thymus and one of the tests it must pass to mature into a single positive mature naive T cell is positive selection. In positive selection your body is making sure that the T cell that it produces is reactive to your own MHC. If it cannot bind to your own MHC, the T cell is useless and it will just die by neglect in your thymus. In positive selection the T cell is "tickled" with thymic endothelial cells that express your own MHC class 1 and MHC class 2. If there is an affinity of the T cell to bind to your MHCs it will continue to the next step in maturation which is negative selection. If the T cell binds way too strongly to your MHC it will also die. There is a specific range that it must bind to your own MHC for it to continue.

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Q: T cells undergo positive selection in the thymus which means?
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Where do t-lymphocytes mature?

T lymphocytes undergo their final maturation in the thymus, hence why they are called 'T cells'.


Does thymic selection destroy MHC molecules?

The thymus goes through a positive and negative selection for T cells. T cells will respond to MHC class 1, either ignore if self or activate to destroy if foreign.


What is the organ in which t cells mature?

T cells mature in the thymus The T-cells mature in both the thymus gland and the organs known as tonsils.


What does the thymus secrete to stimulate T lymphocytes?

Im afraid that your question is quite unclear. If you are refering to how the thymus turns pre-T Cells into Naieve T-cells, this is not a process mediated by a secretion. Its a process called positive and negative selection (or central tollerance) mediated by surface molecules called MHCs present on thymic cells and Dendritic Cells, which eliminates those cells that either do not react with these MHCs or react too strongly. I hope this answers your question.............


Does the thymus lack T cells?

False, the Thymus lacks B cells.


Does the thymus produce red blood cells?

No. Your thymus is lymphoid organ. It does not produce the red blood cells.


What hormone helps with the maturing of white blood cells?

The thymus gland, it promotes the maturation of T-cells.


What is stem cells seed which structure that help develop T cells?

Stem cells seed which structure that helps develop T cells are the thymus gland.


Which type of white blood cells is produced in the thymus and destroys the cell membranes of bacteria?

The primary function of the thymus is the processing and maturation of special lymphocytes (white blood cells) called T-lymphocytes or T-cells, which are associated with antibody production. T-lymphocytes migrate from the bone marrow to the thymus, where they mature and differentiate until activated. in short the thymocytes present in the thymus produces the T lymphocytes


What boby cells undergo meiosis?

Body cells do not undergo meiosis. Reproductive cells undergo meiosis, body cells, mitosis.


What cells in the thymus gland and destroy invading cells?

killer t cells


T cells mature in the thymus gland?

Yes, T lymphocytes mature in the Thymus Gland.