1.   Although no receptor for DHEA has yet been identified, its close biochemical cousin DHEA sulfate is known to interact with brain receptors for the neurotransmitter GABA.

2.   Detachment comes about, Fisher speculates, because brain receptors become desensitized to the neurochemicals that helped bring about the original attachment.

3.   For example, barbiturates seem to affect one subtype of brain receptor called GABA-alpha, whose action inhibits the firing of brain cells.

4.   Methadone is an agonist, which stifles the craving for heroin by binding to the brain receptor.

5.   Most existing treatments for drug abuse act on brain receptors or neurotransmitters, the chemicals that allow brain cells to communicate with each other.

6.   The chips revealed many genes had become less active, including three for brain receptors, and several that code for proteins involved in building nerve synapses.

7.   This substance stimulates the same brain cell receptors that respond to THC, the psychoactive substance in marijuana that induces feelings of euphoria.

8.   Half received injections of naloxone, a drug used to treat heroin overdoses because it blocks brain opiate receptors.

9.   Nicotine from a patch turns on some brain receptors and mecamylamine blocks others.

10.   Some experiments use resolution imaging of brain receptors to determine where nicotine spreads with each puff.