Pathogens 0.0 / 5 ? BiologyHealth, illness and diseaseASAQA Created by: meganbradfield1Created on: 20-03-16 16:20 What are the 4 things a microorganism must do in order to be considered as a pathogen? Gain entry to the host; colonise tissues of the host; resist defences of the host; cause damage to host tissues. 1 of 9 What are some examples of pathogens? Bacteria, viruses, fungi 2 of 9 When does an infection occur? When a pathogen gains entry to the host and colonises its tissue. 3 of 9 When does disease occur? When an infection leads to symptoms in the host. 4 of 9 What is transmission? When a pathogen is transferred from one person to another. 5 of 9 What interfaces can be considered as common points of entry for pathogens? Gas exchange system and the digestive system 6 of 9 What are the bodies natural defences towards pathogens? Mucous layer covering exchange surfaces; enzymes; stomach acid. 7 of 9 How do pathogens cause disease? By damaging host tissues and producing toxins. 8 of 9 What is an interface? A surface environment with the internal environment of the body - e.g. skin. 9 of 9
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