The picture shows a T cell (on top) interacting with another cell, labeled with a question mark (?). The arrow indicates _______ TCR and the cell interacting with a T cells could be a _______.

The picture shows a T cell (on top) interacting with another cell, labeled with a question mark (?). The arrow indicates _______ TCR and the cell interacting with a T cells could be a _______.1 pointan αβ; healthy macrophagean αβ; viral-infected red blood cellan αβ; viral-infected B cella γδ; healthy macrophagea γδ; viral-infected red blood cella γδ; viral-infected B cell

__________ are the most abundant T cells, and their function is to __________.ANSWERT helper cells (CD4+); activate B cells to stimulate the humoral branch of adaptive immunityT cytotoxic cells (CD8+); directly destroy cells that are virus-infectedT helper cells (CD4+); coordinate the adaptive immune responseT cytotoxic cells (CD8+); seek and destroy cancer cells

Which of the following is the primary activation signal to fully activate T helper cells?ANSWERThe TCR/MHC/antigen interaction is assisted by CD8 on the surface of T helper cells.The B7 protein on the APC cell surface interacts with CD28 on the surface of T helper cells.The TCR of the T helper cell interacts with the MHC I–antigen complex.The T-cell receptor (TCR) of the T helper cell interacts with the MHC II–antigen complex.

Compared to the MHC molecule on the left, the MHC molecule on the right (in the drawing above) will bind a ______ peptide that, if foreign, will cause a T cell to activate and _________. The protein on the left is made up of two peptides, each with two domains. One peptide has domains labeled alpha 1 and 2, the other beta 1 and 2. The protein on the right is made up of two peptides, one with three domains labeled alpha 1, 2 and 3 and the other a single domain labeled beta MG.

_______ is a cell boundary that specifies which cell is active at that moment.Answer areaColumnNone of the aboveRowCell Pointer