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10 Cards in this Set
- Front
- Back
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Keeping Healthy
What do we mean by a 'Balanced Diet'? |
A balanced diet contains the correct amounts of all the nutrients needed for healthy bodily functions |
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Give three reasons to explain why a person may be malnourished: |
They may take in too much energy; they may have too little food; particular nutrients may be missing from their diet |
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Give three factors that affect how much energy a person needs: |
Size of the person; sex of the person; the amount of exercise they do |
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What is meant by 'metabolic rate' and what factors affect the rate? |
Metabolic Rate is a measure of how quickly the chemical reactions in cells release energy from food. Exercise/ proportion of fat to muscle/ inherited factors affect the rate |
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Define: a). pathogen b). antibiotic |
a). an organism that causes disease b). a drug that kills bacteria |
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Why is it difficult to produce medicines to destroy viruses? |
Viruses reproduce inside body cells. The drugs would also damage the cells or tissues |
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What is meant by a 'mutation' of a pathogen? |
A mutation is a change in a gene |
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How is a pandemic different from an epidemic? |
A pandemic occurs when a disease spreads between different countries, an epidemic occurs within one country |
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Why don't doctors give antibiotics for mild throat infections? |
Mild throat infections can get better quickly without antibiotics. Overuse of antibiotics results in the development of antibiotic-resistant bacteria |
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Explain how bacteria develop antibiotic resistance: |
Some bacteria mutate and become resistant to an antibiotic. Antibiotics kill the non-resistant strains. The resistant strains multiply. Each time antibiotics are used, more of the resistant strains survive until the whole population of the bacteria is resistant |
