Final answer:
Macrophages, neutrophils, and dendritic cells are the types of white blood cells that are actively phagocytic. Among these, macrophages and dendritic cells also act as antigen-presenting cells whereas neutrophils are the most numerous and fast-acting phagocytes. The correct options are c,d,g.
Step-by-step explanation:
Phagocytes are specialized white blood cells that engulf and digest pathogens, a process known as phagocytosis. This is a fundamental component of the innate immune system. There are various types of phagocytic cells amongst the white blood cells, but not all white blood cells serve this function. The cell types that are actively phagocytic according to the question are:
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- c) macrophage
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- d) neutrophil
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- g) dendritic cell
Macrophages are large, efficient phagocytes evolved from monocytes. They act as scavengers to rid tissues of debris and pathogens and are able to present antigens to the adaptive immune system. Neutrophils are the most common type of phagocytes that respond quickly to infections, containing granules with digestive enzymes to destroy pathogens. Dendritic cells are antigen-presenting cells that also perform phagocytosis. Consequently, the cell types c), d), and g) are correct options for actively phagocytic cells.