Pathogens (B1.1.2 How our bodies defend themselves against infectious diseases) Flashcards
1
Q
What are pathogens?
A
Microorganisms that cause infectious diseases.
2
Q
When does a disease occur?
A
When large numbers of pathogenic micro-organisms enter the body.
3
Q
Are all bacteria pathogens?
A
No
4
Q
How do pathogenic bacteria make us feel ill?
A
They reproduce rapidly inside the body and may produce poisons (toxins) which make us feel ill.
5
Q
How big are viruses compared to bacteria?
A
Viruses are much smaller than bacteria.
6
Q
Are all viruses pathogens?
A
Yes
7
Q
How do viruses cause illness?
A
They produce toxins and they damage the cells in which they reproduce.
