B1.1.5 - Defence Mechanisms


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  • Created by: Maddi
  • Created on: 12-04-14 18:36
What are the four main ways infectious diseases are spread?
Droplet infection, Direct contact, Through a break in your skin and Contaminated food and drink.
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How does your body stop pathogens getting in?
Skin. Mucus. Stomach Acid.
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How does your skin stop pathogens getting into your body?
Your skin acts like a barrier. When you cut yourself, your blood forms a clot that forms a scab. The scab forms a seal over the cut, preventing microbes getting in.
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How does mucus help prevent pathogens getting into your body?
Mucus forms the lining of your lungs and tubes. It is sticky and traps the pathogens.
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How does stomach acid help prevent microorganisms getting into your body?
The acid in your stomach destroys the pathogens you take in through your mouth
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How do white blood cells protect us from disease?
Ingest microorganisms, produce antibodies and produce antitoxins.
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How do white blood cells ingesting microorganisms protect you against disease?
They destroy the pathogens, therefore they can't make you ill.
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How do white blood cells producing antibodies protect you against disease?
Antibodies target specific bacteria or viruses and destroy them. You need a unquie antibody for each pathogen. Once your white blood cells produce antibodies for one pathogen they can remember if they meet that pathogen again.
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How do white blood cells producing antitoxins protect you against disease?
Antitoxins counteract (cancel out) the toxins (posions) released by pathogens.
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Other cards in this set

Card 2

Front

How does your body stop pathogens getting in?

Back

Skin. Mucus. Stomach Acid.

Card 3

Front

How does your skin stop pathogens getting into your body?

Back

Preview of the front of card 3

Card 4

Front

How does mucus help prevent pathogens getting into your body?

Back

Preview of the front of card 4

Card 5

Front

How does stomach acid help prevent microorganisms getting into your body?

Back

Preview of the front of card 5
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