An object's describes it's distance and direction from a reference point . 1 : acceleration
2 : displacement
3: motion
4: position
5: speed
6 : velocity

6: velocity i hpe this is what your looking for

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.