B-cells become Plasma Cells. When a B-cell receptor connects to its specific antigen, a Helper T-cell releases chemicals that tell that B-cell to divide many times. This makes an army of B-cells with the perfectly shaped B-cell receptor to connect to the invader in your body.Many of these B-cells quickly turn into Plasma cells.how/hide words to know. 1  Antibody: a molecule made by B-cells to trap foreign particles and microbes... 2  Molecule: a chemical structure that has two or more atoms held together by a chemical bond. 3  Plasma cell: an immune cell that comes from B-cells and makes and releases antibodies. 4  Receptor: a molecule on the surface of a cell that receives ...