T regulatory cells secrete _____ cytokines.

Which of the following is true about AIRE?

Which chemotactic molecule signals naive T-cells that do not meet their antigen in a lymph node to exit that lymph node and continue to recirculate until they do meet their antigen?

Central tolerance for T-cells takes place in the ________. 

Which of the following cytokine is expressed by T regulatory cells?

When an immature T-cell fails to productively rearrange its genes, which of the following happens?

A T-cell going through the selection process can:

Binding of B7 on a naive T-cell to CTLA-4 on a dendritic cell slows down activation and suppresses the cell from proliferating.

IL-4 is induced in a CD4 TH2 cell under the direction of the transcription factor _____.

Formation of the pre-TCR induces proliferation of thymocytes, during which the expression of RAG1 and RAG2 is maintained.