Drugs and the human body

1

What do depressants do?

2

What sort of drug is caffeine?

3

How are drugs produced?

4

Why are drugs tested on animals?

5

What is a placebo?

6

In which sort of trial do the researchers know which group the volunteers are in, but the volunteers do not?

7

How do antibiotics work?

8

What is the addictive substance in tobacco smoke?

9

Why does smoking increase the risk of coronary heart disease?

10

What is a long term effect of excessive alcohol use?