Which of the following terms describes the primary white blood cells involved in the immune response?
lymphocytes
monocytes
leukocytes
antigens
The leukocytes are also called as white blood cells. The lymphocytes are involved in the adaptive immune system and hence they are involved in the secondary immune system. The antigens are produced by the pathogen cells. The monocytes are the first cells that will differentiate into macrophages and histiocytes which are the first acting cells in the immune response system. Hence the correct answer is: monocytes.
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