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Cross presentation is when a dendritic cell utilizes phagocytosis to bring in an extracellular viral pathogen and presents those pathogens peptides on MHC I.

Which of the following genes are turned on during T cell development and are turned off after development is finished?

___ are stimulated by cytokines binding to cytokine receptors. This stimulation leads to the phosphorylation and activation of ___.

Negative selection:

Which of the following receptor genes are the first to be rearranged in a double negative thymocyte?

T-cells go through somatic recombination in the _____________, and T-cells differentiate into effector cells in the ___________.

Before positive selection, T cells can express two different ___ chains and therefore can express two different TCR’s on their surface.

Which of the following can be found in the thymus?

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

Which CDR’s in a TCR recognize and contact primarily the MHC helices?