1.   A neurotransmitter has only a brief stay at its receptor site.

2.   Block pointed out that Ritalin works almost exactly like cocaine, affecting the same receptor sites in the brain.

3.   By making an artificial copy of the fragment, they were able to find a receptor site on normal brain cells that binds the prion fragment.

4.   It stimulates the receiving cell by briefly attaching to a receptor site on that cell.

5.   Other drugs, like ketamine, exert their effects at receptor sites that receive excitatory messages.

6.   Scientists believe that raloxifene prevents estrogen-related breast cancers by occupying the same molecular receptor sites as the estrogen molecule on the surface of cells.

7.   The drug blocks the receptor sites in the brain that signal a craving and pleasure for alcohol, Damski said.

8.   It works by blocking the opiate receptor sites on the cell membranes where the dadah takes effect.