Zusammenfassung der Ressource
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What is a pathogen?
Antworten
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A brand of vacuum cleaner
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A microorganism with the potential of causing disease by gaining entry to the host, colonise the host's tissues, resist the host's defences and causes damage to host's tissues.
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A bacteria, a fungus or a virus
Frage 2
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If a pathogen colonises the host's tissues, a disease occurs which then becomes an infection.
Frage 3
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How do pathogens enter the body?
Antworten
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Gas exchange system and the digestive system
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Digestive system and the circulatory system
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Circulatory system and the gas exchange system
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None of the above
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Pathogens cause disease by damaging the host's tissues and producing toxins.
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How do pathogens cause damage to the host's tissues?
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By dissolving the cells with toxins
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By preventing the tissues to function properly due to the sheer number of pathogens
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By transmitting the messages to the wrong cells
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By preventing the synthesis of important substances e.g. DNA, RNA and proteins
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By breaking down the host's membranes
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All diseases have a single cause
Frage 7
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How quickly a pathogen causes damage is related to the size of the pathogen before division.