microbes can enter the body by: immunity257395]ko_immunity... · 2018. 12. 10. · immunity...
Post on 04-Oct-2020
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Immunity
Microbes can enter the body by:
Body defences against disease
White blood cells are
specialised cells which
either engulf pathogens
and break them down
to harmless products
or produce specific
antibodies which render
the pathogens harmless.
Natural Immunity
Antibodies are produced by a person when needed or they are passed on by the mother during pregnancy.
Artificial Immunity
A vaccine with dead microbes is injected –
the body is “tricked” into producing antibodies
ready for the real thing. This is called
PASSIVE IMMUNISATION
The antibodies are injected directly into the body –
this is called ACTIVE IMMUNISATION.
1. What is the definition of a disease? 2. Name 4 ways in which a disease can be caused. 3. How can a microbe enter the body? 4. What are the bodies first line defences? 5. Which cell can fight off a disease? 6. How does the white blood cell fight a disease? 7. What is natural immunity? 8. What is artificial immunity?
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