You can tell the difference between an uncommitted progenitor cell and a double negative thymocyte committed to the T cell lineage based upon surface molecules. Which one of the following is not expressed by a double negative thymocyte committed to the T cell lineage? CD1A CD2 CD44 CD127

Figure 42.11 Which of the following statements about T cells is false? Helper T cells release cytokines while cytotoxic T cells kill the infected cell. Helper T cells are CD4+, while cytotoxic T cells are CD8+. MHC II is a receptor found on most body cells, while MHC I is a receptor found on immune cells only. The T cell receptor is found on both CD4+ and CD8+ T cells.

It is often helpful to draw a complicated pathway in the form of a flow chart to visualize the multiple steps and the ways in which the steps are connected to each other. Draw the antibody-mediated immune response pathway that acts in response to an invading virus.

Which type of T cell is most effective against viruses? Th1 Th2 cytotoxic T cells regulatory T cells