3.2.1 The Causes of Disease: Pathogens, Lifestyle & Disease Flashcards
1
Q
Define Pathogen
A
Microorganisms that cause disease
2
Q
Define Infection
A
When a pathogen enters a host cell and colonises tissues
3
Q
Define Disease
A
Description of symptoms
4
Q
Name the 2 main ways pathogens affect the body
A
- Damaging host tissues
- By producing toxins
5
Q
What is a correlation?
A
When change in one of 2 variables is reflected by change in other variable
6
Q
What do you need to prove something causes something else (e.g. smoking is the cause of lung cancer)?
A
causal relationship
7
Q
What is a risk?
A
Measure of probability that damage to healthy will occur as a result of given hazard
