Immunity part 1
- Created by: Amy_sprott
- Created on: 17-01-18 18:10
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- IMMUNITY 1
- Pathogen
- A micro-organism that can cause disease
- 4 types
- Bacteria, Fungi, Virus, Protist
- How does a pathogen harm us?
- Kill/damage cells
- Release toxins
- Antigen
- A protein receptor that is capable of inducing an immune response
- Ways to spread pathogens
- Air
- Droplets in the air are inhaled which contain pathogens
- Vectors
- Animals carry pathogens
- Contaminatedfood
- Pathogens enter through digestive system
- Raw, undercooked or contaminated food
- Pathogens enter through digestive system
- Water
- Fungal spores or pathogens in water (drinking or for plants)
- Direct contact
- Common in plants, direct contact of the skin, blood-borne pathogens
- Air
- Defence mechanisms
- Non-specific
- Phagocytosis
- Physical barrier e.g.Skin
- Specific
- Cell-mediated (T cells)
- Humoral (B cells)
- Non-specific
- White blood cells
- Phagocytes
- T cells
- Killer T cells (Cytotoxic cells)
- Helper T cells
- Memory T cells
- B cells
- Plasma cells
- Memory B cells
- Pathogen
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