Someone gabriela is sick with a bad cold. her immune system is defending her body against the invading virus. the first line of defense is cells called macrophages, which attack viral particles. the cells eliminate viral particles in a process called endocytosis. arrange the in the correct order steps of endocytosis. 1 cell recognizes the viral particle as foreign material and binds to it using receptors on the cell membrane. 2 digestive enzymes inside the vesicle destroy the virus particle. 3 the cell membrane folds to surround the virus particle. 4 the folded cell membrane pinches off to form a vesicle around the virus particle which is now inside the cell.