Biology

Revision for Biology chapter 1 of unit 1

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  • Created by: Sim
  • Created on: 03-12-12 17:25
What happens to your body if you take in too much energy or too few vitamins
You become malnourished
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Why do people become obese
They have taken more energy than they have used
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Why do starving people find it difficult to walk about
They have too little energy/may have a disease
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how can people change their lifestyle to help lower their blood cholesterol levels
they can increase exercise/reduce fat intake
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how do pathogens make you feel ill
they produce toxins/damage cells
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why did it take a long time for others to accept Semmelweiss's ideas
no one knew about bacteria and viruses
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How are many pathogens prevented from entering the body
the skin stops them ( also mucus and 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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Why are antibiotics only able to kill bacteria
Viruses are inside the body cells
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why do industrial laboratories use 35 degrees instead of 25 degrees 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 all equipment , boil solutions and cover petri dish or flasks
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why do some pathogens spread rapidly
very few people are immune to a new pathogen
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how does natural selection cause resistant populations of bacteria to develop
the antibiotics kill the non-resistant strains which allow the resistant ones to survive and multiply (no competition)
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What is meant by vaccination
injection of a dead or inactive pathogen stimulates the white blood cells to produce antibodies
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What are the advantages and disadvantages of vaccination
advantages are : protect the individual and society from serious diseases which can cause death. Disadvantages are : may cause side effects in a few people
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Why is it necessary to develop new medicines
some pathogens are resistant to drugs. New pathogens arise by mutation
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Other cards in this set

Card 2

Front

Why do people become obese

Back

They have taken more energy than they have used

Card 3

Front

Why do starving people find it difficult to walk about

Back

Preview of the front of card 3

Card 4

Front

how can people change their lifestyle to help lower their blood cholesterol levels

Back

Preview of the front of card 4

Card 5

Front

how do pathogens make you feel ill

Back

Preview of the front of card 5
View more cards

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