There are _______ major neurotransmitters that appear to account for most of the effects produced by the action of drugs of abuse on the brain.%0D%0Aa) eight%0D%0Ab) seven%0D%0Ac) six%0D%0Ad) five

Answer 1

The correct answer is b) seven. There are seven major neurotransmitters that account for most of the effects produced by the action of drugs of abuse on the brain.