Explain and discuss the effects of cannabis in relation to biochemical, behavioural and psychological factors.

The aim of this essay is to explain and discuss the drug cannabis and its effects in relation to biochemical, behavioural and psychological factors.   The introduction will outline a brief history relating to the drug and include both the medicinal and recreational purposes of its use.  The main discussion will explain how the drug chemistry affects the nervous system emphasising what neurotransmitter is effected and also what behavioural and psychological implications this has on the user.  Finally I will conclude by summarising the main points of the discussion outlining both the long and short term overall effects of cannabis, evaluating what the relative costs and benefits are to the user….(short extract)