Disease and resistance

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What are pathogens?
Pathogens are microorganisms that cause infectious disease.
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Name the two main pathogens
Bacteria and Viruses
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A bacterium splits in to two every?
20 minutes
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Name four natural barriers than protect your body from disease
skin, chemicals in tears, chemicals in sweat, stomach acid.
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What are the three functions of white blood cells?
ingest pathogens and destroy them, produce antibodies to destroy pathogens, produce antitoxins that neutralise the toxins released by pathogens.
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What are memory cells?
Memory cells are a type of white blood cell that can respond quickly when it meets a microorganism for the second time. This is described as being immune to a disease.
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What does it mean when a disease has a high mutation rate?
A high mutation rate means that the DNA of the virus frequently changes, so the human body has to destroy the virus using a different antibody each time, which makes it harder to develop immunity.
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Other cards in this set

Card 2

Front

Name the two main pathogens

Back

Bacteria and Viruses

Card 3

Front

A bacterium splits in to two every?

Back

Preview of the front of card 3

Card 4

Front

Name four natural barriers than protect your body from disease

Back

Preview of the front of card 4

Card 5

Front

What are the three functions of white blood cells?

Back

Preview of the front of card 5
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