Just what are Neurotransmitters? In this episode of Crash Course Psychology, Hank takes us to the simplest part of the complex system of our brains and nervous systems; The Neuron.

Crash Course Psychology Hank and John Green - brothers, vloggers, novelists, and convention founders - produce and star in a number of video series teaching a variety of topics including history ...

This short video, then, provides a whistlestop tour of the current state of psychology—the study of our complex mental functions and behaviors.