GCSE AQA Biology Defence Mechanisms

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Created by: Leah
Created on: 25-02-11 10:14

What part does your skin play in preventing microorganisms from getting into your body?

It covers your body and acts as a barrier preventing harmful bacteria and viruses from getting to the tissues

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What is the role of platelets?

They help to form a scab over a cut to prevent pathogens getting into the wound

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What part does mucus play in preventing disease causing pathogens from getting into your body?

It is a sticky substance which catches the pathogens and moves them down into your gut

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Some pathogens still get into your body where they meet the secondary barrier. Your white blood cells of your...

Immune system

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Some white blood cells produce antibodies. What are antibodies and what do they do?

Chemicals which target particular bacteria or viruses and destroy them.

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What is meant by the term 'droplet infection' when talking about spreading diseases?

When you cough, sneeze or talk, tiny droplets full of pathogens from your breathing system leave your body. Other people breathe them in along with the pathogens they contain.

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Some white blood cells produce antitoxins. What is meant by this term?

Antitoxins counteract the toxins released by pathogens by joining with them like a jigsaw puzzle

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Other cards in this set

Card 2

Front

What is the role of platelets?

Back

They help to form a scab over a cut to prevent pathogens getting into the wound

Card 3

Front

What part does mucus play in preventing disease causing pathogens from getting into your body?

Back

Card 4

Front

Some pathogens still get into your body where they meet the secondary barrier. Your white blood cells of your...

Back

Card 5

Front

Some white blood cells produce antibodies. What are antibodies and what do they do?

Back

View more cards

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GCSE AQA Biology Defence Mechanisms