sentences:  Conversely, complement receptor-mediated pathogen ingestion occurs without observable membrane extensions (particles just sink into the cell) and does not generally results in an inflammatory mediator response.Following internalization, the microbe is enclosed in a vesicular phagosome which then undergoes fusion with primary or secondary lysosomes, forming a phagolysosome.There are various mechanisms that lead to intracellular killing; there are oxidative processes, and others independent of the oxidative metabolism.