| http://www.w3.org/ns/prov#value | - Neurochemical researchers understand that, for good or ill, the brain is especially receptive to certain drugs and not others.??? Neurotransmitters, which carry messages between brain cells, come in different shapes and act as keys searching out their matching keyholes.??? They include opioid receptors, which are quite similar to substances released by heroin, opium and other opiates.
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