Keeping healthy 0.0 / 5 ? BiologyHealthy livingGCSEAQA Created by: superlouasaurCreated on: 20-02-15 20:22 What is a pathogen? A disease-causing microorganism 1 of 29 One of the main problems with viruses is that they: damage the host cell when they reproduce 2 of 29 What is one of the main problems with bacteria? They produce toxins. 3 of 29 What is a function of white blood cells? To ingest and destroy pathogens 4 of 29 What is a way in which antibodies can neutralise pathogens? They stick the pathogens together so they are ingested more easily. 5 of 29 What can vaccination involve? Injecting an inactive form of the pathogen to stimulate immunity 6 of 29 What is one way that antibiotics work? They can stop bacteria from reproducing 7 of 29 What is the main reason why we should be careful not to overuse antibiotics? Dangerous strains of resistant bacteria may develop by natural selection. 8 of 29 There is no vaccine against the common cold because: the cold virus mutates too quickly for a vaccine to be effective 9 of 29 What is a conflict between a person's right to decide about what is best for themselves and what is right for society as a whole? having their children vaccinated 10 of 29 What is an issue that parents must consider when having their child vaccinated? do the benefits outweigh the risks? 11 of 29 What are antibiotics? Substances that kill bacteria or prevent their growth. 12 of 29 Antibiotics are effective against: bacteria 13 of 29 What is the main reason why we should be careful not to overuse antibiotics? Dangerous strains of resistant bacteria may develop by natural selection. 14 of 29 Antibiotic resistance can develop because: mutations in individual bacteria protect them from the antibiotic, allowing them to reproduce 15 of 29 What happens to new medical drugs before they are released? They are tested in the laboratory, then on volunteers. 16 of 29 What is one reason why drug development is so expensive? Most of the chemicals that are developed by drugs companies do not pass all of the tests. 17 of 29 What are the features of a double-blind trial? Neither the researchers nor volunteers know what the volunteers are receiving. 18 of 29 A placebo is: an inactive substance given in place of a drug 19 of 29 Which blood vessels have the thickest walls? Arteries. 20 of 29 Veins take blood: to the heart and have valves. 21 of 29 In which vessels is blood pressure greatest? Arteries. 22 of 29 What do the coronary arteries do? supply the heart muscle with blood. 23 of 29 A common risk factor for heart disease is: being overweight 24 of 29 What is a correlation between a factor and an outcome? people who smoke are more likely to have heart disease 25 of 29 What factors could increase the risk of heart disease? number of cigarettes smoked 26 of 29 John's grandfather smoked 60 cigarettes a day and lived to be 98 when he died in his sleep. Which of the following best explains this statement? individual cases do not provide convincing evidence 27 of 29 For a scientist, which of the following is an example of the peer review process? having your work checked by other scientists 28 of 29 Which of the following scientific claims is the most reliable? one that has been checked and repeated by other scientists 29 of 29
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