1. Which of the following is a class A drug?
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2. What sort of drug is caffeine?
- A depressant
- A stimulant
- A painkiller
3. Alcohol is a...
4. What do depressants do?
- They release receptor molecules
- They slow down brain activity
- They cause more neurotransmitter molecules to diffuse across the synapse
5. Which type of drug blocks the transmission of nerve impulses?