What are the two types of phagocytes and how much bacteria can they engulf?
Neutrophils (5-20) and Macrophages (100).
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What causes a phagocyte to engulf a pathogen?
Pathogens releases toxins and the damaged cell releases histamines. These act as chemoattractants attracting the phagocyte.
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What do histamines do?
They increase the permeability of capillaries and cause the dilation of blood vessels (releasing monocytes into the blood when a body cell is damaged).
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What is a phagosome?
This is where the pathogen is enclosed within after the macrophage engulfs the pathogen.
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What do lysosomes do?
They fuse with the phagosome releasing enzymes on to the pathogen, breaking it down.
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When is the major histocompactibility complex formed?
This is formed when antigens from the pathogen are displaced on the surface of the macrophage. The macrophage then becomes an APC (antigen presenting cell).
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Other cards in this set
Card 2
Front
What causes a phagocyte to engulf a pathogen?
Back
Pathogens releases toxins and the damaged cell releases histamines. These act as chemoattractants attracting the phagocyte.
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