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5328621
Defence Against Pathogens
Descrição
- Plant defences against Pathogens - Primary non-specific defences
Sem etiquetas
skin
mucous membranes
clotting
inflammation
expulsive reflexes
biology
disease and the immune system
a-level
Mapa Mental por
Dean Lundie
, atualizado more than 1 year ago
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Criado por
Dean Lundie
aproximadamente 8 anos atrás
5
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Resumo de Recurso
Defence Against Pathogens
Animals
Skin
Physical barrier that blocks pathogens
Contains antimicrobial chemicals
Mucous Membranes
Protect body openings
Secrete mucous which traps and kills pathogens
Blood Clotting
Mesh of protein fibres
Prevent pathogen entry and blood loss
Inflammation
Tissue damage increases permeability of blood vessels
Leaks fluid into surrounding area and isolates the pathogens
Swelling
Vasodilation increases blood flow
More White blood cells
Wound Repair
Outer layers of skin divide and move to edge of wound
This tissue underneath contracts to connect the edges with collagen fibres
Expulsive Reflexes
Automatic response to expel foreign objects, including pathogens
Coughing and Sneezing
Plants
Physical
Waxy Cuticle
Cell walls
Callose Deposition
Sieve plate in the phloem are blocked by a polysaccharide called callose. This prevents pathogens from moving through the phloem
Chemical
Produce antimicrobial chemicals
Saponins
Chemicals that are toxic to insects
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