S1P1 Receptor Is Upregulated by Naïve T Cells and B

question 32

Multiple Choice

S1P1 receptor is upregulated by naïve T cells and B cells after 12-18 hours if they fail to encounter antigen in the lymph node.This means all of the following EXCEPT

• A)the naïve cells have not been activated.
• B)the naïve cells have not encountered antigen.
• C)the naïve cells will exit the lymph node.
• D)space will be made for other cells to enter the lymph node.
• E)the naïve cells will die by apoptosis.

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