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  • Created by: Angelique
  • Created on: 19-12-12 09:25


B-cells and antibodies:

  • B-cells are white blood cells that produce antibodies.
  • a antibody is a protien molecule that can bind specifically to a antigen.
  • each B-cell has antibody molecules on its surface and can secrete soluble antibodies into its surroundings.

T-cells and receptors:

  • T-cells are white blood cells that have receptor protiens on their surfaces.
  • receptor protiens have only one binding site and are only found on the surface of T-cells.
  • receptor protiens bind specifically to antigens to form antigen-receptor complexes.

helper T-cells and clonal selection:

  • the antigen presenting cell will encounter a heplper T-cell with a matching receptor molecule, so the two can bind together.
  • the tight binding stimulates the helper T-cells to release cytokines, which stimulate immature T and B-cells, when activated they divide by mitosis. this is clonal selection as only the selected cells are cloned.
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