Examlex
Theoretical physicists have had the least success in combining which force with the electromagnetic force?
Endorphins
Neurotransmitters produced in the brain that act as natural painkillers and are also involved in feelings of pleasure or euphoria.
Opiates
A group of drugs derived from opium used for their analgesic, sedative, and narcotic effects.
Mimic
Imitation of someone or something, often to entertain or to learn.
Depressants
Drugs that slow activity in the central nervous system.
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