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You learned in the previous lesson that T cells require two independent signals to become
activated. When T cells are activated, they acquire effector functions and begin to proliferate.
This two-signal mechanism prevents the expansion of self-reactive effector T cells.
Similarly, B cell receptor signaling alone is not sufficient to activate B cells. B cells require
assistance from helper T cells to become activated by monovalent protein antigens and gain
certain immune functions. What changes do you suspect will occur to B cells when they are
activated by protein antigen and receive T cell help? (Select all that apply.)
1) They will generate memory cells that can respond to a subsequent exposure to antigen.
2) Their immunoglobulin genes will be mutated in a way that alters antigen affinity.
3) The isotype of their immunoglobulin (Ig) genes will change.
4) They will proliferate and expand.
5) They will secrete antibodies.

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Palestine last event orientationfvgnh .pptx
 

You learned in the previous lesson that T cells require two independ.pdf

  • 1. You learned in the previous lesson that T cells require two independent signals to become activated. When T cells are activated, they acquire effector functions and begin to proliferate. This two-signal mechanism prevents the expansion of self-reactive effector T cells. Similarly, B cell receptor signaling alone is not sufficient to activate B cells. B cells require assistance from helper T cells to become activated by monovalent protein antigens and gain certain immune functions. What changes do you suspect will occur to B cells when they are activated by protein antigen and receive T cell help? (Select all that apply.) 1) They will generate memory cells that can respond to a subsequent exposure to antigen. 2) Their immunoglobulin genes will be mutated in a way that alters antigen affinity. 3) The isotype of their immunoglobulin (Ig) genes will change. 4) They will proliferate and expand. 5) They will secrete antibodies.