- Created by: Alice
- Created on: 05-05-11 17:49
What are Pathogens?
Give 2 examples of pathogens
What does bacteria release?
What do viruses do?
Pathogens are microorganisms, that cause infectious disease
Bacteria and viruses
They damage the cells
What do white blood cells do to the pathogens
What do white blood cells produce, why?
What happens in vaccination?
Why are vaccinations given?
They can ingest and destroy the pathogens
White blood cells produce antibodies to destroy the pathogens and antitoxins to neutralise toxins
In vaccination pathogens are introduced into the body in a weakened form
So that it causes the body to produce enough white blood cells to protect itself against the pathogen, while not getting diseased
What can antibiotics effect?
What does bacteria do once inside the body?
Name 3 examples of diseases cause by bacteria?
They can effect the bacteria but NOT the viruses
A living cell that can multiply rapidly
They release poisons or toxins that make us feel ill
Food poisoning, whooping cough, gonorrhoea
Viruses can only reproduce ...
What can viruses do once in the cell?
How is the virus passed out?
Give 3 examples of diseases cause by viruses...
Inside host cells
Make hundreds of thousands of copies of itself
Bloodstream or airways
Chicken pox, colds, flu
What is the first defence of the body against pathogens? What is this aimed to do?
What is the second defence?
Name 3 things white blood cells can do?
What are antibodies and antitoxins?
produce antibodies and destroy pathogensPassive immunity, and this is aimed to stop the pathogens getting in, this includes skin, mucus etc
Active immunity, and this is when the white blood cells come into play
ingest and destroy cells, produce antibodies and destroy pathogens, produce antitoxins that neutralise the pathogen
Why are boosters needed in vaccination?
What are antibiotics?
It's because the immune response memory can weaken overtime
Antibiotics are substances that can kill bacteria, but do not work against bacteria