Chapter 1 - Causes Of Disease Flashcards
0
Q
Define”Correlation”
A
When a change in one variable causes a change in another
1
Q
What are the 3 types of pathogen?
A
Bacteria
Virus
Fungi
2
Q
How thick are capillaries?
A
One cell thick
3
Q
A ventricle fills with blood when what contracts?
A
The atrium
4
Q
When a ventricle contracts blood is forced into?
A
An artery
5
Q
When the ventricle relaxes what prevents back flow of blood into the heart?
A
Semi lunar valves
6
Q
What does correlation show?
A
A causal link
7
Q
What are the two elements to ‘risk’?
A
Probability and consequence
8
Q
Why is a control group necessary in an experiment?
A
To ensure that results are due to the independent variable and not due to other factors
9
Q
Two ways in which pathogens can cause disease when they enter the body?
A
They produce toxins
Destroy tissues
