Recognising non-self cells

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misbah hussain

Cards (3)

Phagocytosis
1. Pathogen releases chemicals that attract phagocytes towards it along a concentration gradient
2. Phagocyte binds to pathogen via complementary receptors
3. Phagocyte engulfs pathogen, encasing it in a vesicle (phagosome)
4. Lysosomes combine with phagosome
5. Lysosomes release lysozymes to break down pathogen through hydrolysis reactions
6. Soluble products are absorbed by cytoplasm, the insoluble are expelled
View source
types of non-self cells that lymphocytes can recognise
Pathogens
Toxins from pathogens
Abnormal body cells
cells from other humans in transplanted organs
Define antigen
A protein in the cell surface membrane that triggers an immune response

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Recognising non-self cells

Cards (3)

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1.2 What Happens in Cells (and What Do Cells Need)?

1.1.2 Animal and Plant Cells

1.1.2 Specialised Cells

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