Which of the following is false about TH2 cells?

When would you expect to see RAG-1 and RAG-2 expressed during the process of T-cell development?

AIRE (autoimmune regulator) is used by a subpopulation of thymic epithelial cells during positive selection to produce some peripheral self peptides.

Langerhans’ cells are a type of mature dendritic cells that take up antigens when the skin is breached.

Which of the following is false about Complete DiGeorge’s Syndrome?

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?