Q$10.$ If you were to watch an individfal neurotransmitter molecule just after it was released, what would happen to it$?$

The molecule would rapidly collide with a large number other molecules at first, and the collision rate would remain just as high over time.

The molecule would rapidly collide with a small number of other molecules at first, and then the collision rate would increase as the molecule diffuses into the middle of the fluid pocket.

The molecule would rapidly collide with lots of other molecules at first, and then the collision rate would decrease over time as the molecule diffuses away from the axon.