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Unformatted text preview: more susceptible to phagocytosis. Proteins which cause this effect include some of the complement system and antibody molecules. 3. Ingestion---the plasma membrane of the phagocyte extends pseudopods that surround and engulf the microbe. The microbe is brought into the cell enclosed in a sac made of a bit of the cells plasma membrane---this is called a phagosome or phagocytic vesicle. 4. Digestion---at this stage, the microbe has not been harmed. The phagocytic cell must now take steps to destroy it. As the phagocytic vesicle moves into the cell, it comes in contact with lysosomes. The membranes enclosing the phagocytic vesicle and the lysosome fuse, forming one larger vesicle called a phagolysosome. The digestive enzymes of the lysosome are able to kill most bacteria within 10 - 30 minutes....
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- Fall '09