You Have a Large Garden with a Variety of Fruits

You have a large garden with a variety of fruits, vegetables, and flowers, and you have a problem with insects eating them. You decide to use Malathion, an organophosphate insecticide, but you are not terribly careful about protecting yourself as you are spraying. Worried, you decide to look up the action of Malathion and find that it is an acetylcholinesterase inhibitor. Explain how this chemical affects muscle contraction and include where it has its effect and why.