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Interaction of Antigen Presenting Cells and T-helper Cells

Why are T-cells necessary? T-cells perform a wide variety of functions in the immune system. All T-cells having membrane receptors that allow them to recognize certain signals in other cells and to respond appropriately. B-cells produce antibodies that bind to antigens and target the molecules or microbes for destruction. T-cells destroy infected cells and also use information from phagocytes that have destroyed pathogens to coordinate the overall immune response. The latter are known as helper T cells.

View the animation below, then complete the quiz to test your knowledge of the concept.

1Which of the following are antigen-presenting cells?
B)B cells
C)cytotoxic T cells
D)A and B
E)A, B and C

2Helper T-cells interact with target cells by recognizing
A)antigens only.
B)MHC proteins only.
C)antigen-MHC protein complexes.
D)either antigens or MHC proteins.
E)neither antigens nor MHC proteins.

3Helper T-cells secrete ________ to stimulate the proliferation of B-cells.

4Helper T-cells interact with Class I major histocompatibility complex (MHC) proteins.

5Plasma cells are B cells that produce antibodies.

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