Science Quiz - Health 02 (Answers)
This KS3 Science quiz will challenge you on health. Bacteria and viruses can affect our health. The common cold is caused by a virus and is probably the most frequent infectious disease in humans. There is currently no known cure or vaccine. When people have a bad cold, they often think that they have influenza (flu). Influenza is similar to the common cold but is caused by a different set of viruses. Some strains of the influenza virus can be fatal to vulnerable people, for example, the elderly. It is possible to vaccinate against influenza, but that only lasts for a few months.
Before the Second World War, if you had a wound that became infected, it was quite possible that you could die. The bacteria from the infection could enter the bloodstream and poison it, this is called septicemia. The antibiotic penicillin was discovered accidentally in 1928, but it wasn't until part way through the Second World War that a way of producing it in large quantities was discovered. Penicillin and other antibiotics have saved millions of people's lives around the world. Over-use of antibiotics and people not taking them properly has led to the evolution of superbugs - forms of bacteria that are resistant to all known antibiotics.
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You can find more about this topic by visiting BBC Bitesize - Health and disease
These defend your body against infection by bacteria, viruses and fungi
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This helps to create immunity to certain diseases that were once responsible for killing millions of people
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Viruses can reproduce rapidly, but only in living cells. A virus is technically not alive, it shows none of the signs of life like respiration. It is more like a chemical that can reproduce itself when it gets into a living cell. To talk about killing a virus is not really correct, it is better to say destroying a virus
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Antibiotics only work on bacteria, they do not destroy viruses or fungal infections
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Some vaccines have living bacteria but in a weakened form. A vaccine trains our white blood cells what antibodies are needed to fight off the infection in the future
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Spores of the tetanus bacteria enter a wound from soil, dust or animal faeces. You can't catch tetanus from someone who has the disease
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There are more microbes on your body than there are humans on Earth
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People with athletes foot should not use communal showers as it is easy to pass it on to others. It is easily cured by using an anti-fungal cream or powder
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Mushrooms are fungi. Bread and beer are made with yeast which is a fungus
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Fungi can't photosynthesise, they obtain their nutrients by releasing enzymes onto the material around where they are growing
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