Rhombus - Area. 1  As for all parallelograms, the area K of a rhombus is the product of its base and its height (h). 2  The area can also be expressed as the base squared times the sine of any angle... 3  or in terms of the height and a vertex angle... 4  or as half the product of the diagonals p, q...
Helper T cells augment the immune response by recognizing the presence of a foreign antigen and then stimulating antibody production and producing cytokines that âturn onâ or activate other T cells. Regulatory T cells function in an opposite manner: they dampen or turn off the immune response.
Small lymphocytes 7â8 Large lymphocytes 12â15. 1  B cells: releases antibodies and assists activation of T cells. 2  T cells: CD4+ Th (T helper) cells: activate and regulate T and B cells. CD8+ cytotoxic T cells: virus-infected and tumor cells. 3  Natural killer cells: virus-infected and tumor cells.