A primary antigen-presenting cell,a cell that presents an antigen that activates a helper T cell,is a

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Macrophages are the primary antigen-presenting cells as they have the ability to phagocytize pathogens and present them to T cells. B cells can also present antigens, but mainly to activate their own differentiation into plasma cells. T cells cannot present antigens to themselves, but they can recognize antigens presented by other cells. Chondrocytes are specialized cells found in cartilage and do not have a role in presenting antigens.

A Primary Antigen-Presenting Cell,a Cell That Presents an Antigen That