Phagocytosis involves a phagocyte being attracted to a pathogen, binding to its antigens, engulfing it into a phagosome, fusing with lysosomes to digest it, and then egesting indigestible material.
- phagocyte attracted to pathogen by chemotaxis - phagocyte receptors bind to pathogen antigens - pseudopodia extend around pathogen, engulfing it in phagosome (vesicle) - lysosomes migrate towards and fuse with phagosome (NOT EXOCYTOSIS) - lysozymes hydrolyse cells or bacterial cell walls - soluble products absorbed into cytoplasm - indigestible products egested
| Front | How does phagocytosis work? |
|---|---|
| Back | - phagocyte attracted to pathogen by chemotaxis - phagocyte receptors bind to pathogen antigens - pseudopodia extend around pathogen, engulfing it in phagosome (vesicle) - lysosomes migrate towards and fuse with phagosome (NOT EXOCYTOSIS) - lysozymes hydrolyse cells or bacterial cell walls - soluble products absorbed into cytoplasm - indigestible products egested |
Tags: immunity
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