DEFENDING

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  • Created by: LAUREN.F
  • Created on: 15-05-16 20:08
How do pathogens make you feel ill?
Pathogens produce toxins/damage cells.
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Why did it take a long time for others to accept the ideas of Semmelweis?
No one knew about bacteria and viruses.
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How are many pathogens prevented from entering the body?
The skin stops pathogens entering, also mucus, stomach acid.
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How do white blood cells defend the body?
They ingest pathogens, produce antibodies, produce antitoxins.
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What is meant by 'vaccination'?
Injection/oral drops of dead or inactive pathogen to stimulate the white blood cells to produce antibodies.
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How to antibodies 'recognise' antigens?
By their shape.
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Why are antibiotics only able to kill bacteria?
Viruses are inside body cells.
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Why do some pathogens spread rapidly?
Very few people are immune to the new pathogen and no effective treatment is available.
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How does natural selection cause resistant populations of bacteria to develop?
Antibiotics kill the non-resistant strains which allows the resistant strains to survive and multiply (no competition).
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Why do industrial laboratories use 35 degrees instead of 25 degrees as in schools?
The bacteria will grow at a faster rate.
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How do you make sure that unwanted microorganisms do not contaminate a pure culture of bacteria?
Heat/sterilise all equipment, boil solutions, cover Petri dishes or flasks.
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Look at the plate. How do you know if the bacteria have been killed by the antibiotic?
There is a clear are around the filter paper disc.
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Other cards in this set

Card 2

Front

Why did it take a long time for others to accept the ideas of Semmelweis?

Back

No one knew about bacteria and viruses.

Card 3

Front

How are many pathogens prevented from entering the body?

Back

Preview of the front of card 3

Card 4

Front

How do white blood cells defend the body?

Back

Preview of the front of card 4

Card 5

Front

What is meant by 'vaccination'?

Back

Preview of the front of card 5
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