_________________ are white blood cells that engulf foreign particles and display the invader's antigen like a signal flag.

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Quizplus · Accepted Answer

Macrophages are known as the "big eaters" of the immune system. They engulf foreign particles and then display the invader's antigen on their cell surface, acting like a signal flag to activate other immune cells to help fight the infection. Helper T cells and antibodies also play important roles in the immune response, but they do not directly engulf foreign particles like macrophages. Lymphocytes are a type of white blood cell, but not all types of lymphocytes are capable of engulfing foreign particles like macrophages can.

_________________ Are White Blood Cells That Engulf Foreign Particles and Display