One Body by XVIVO (2m 14s):
Get Body Smart: superb interactive, illustrated tutorials and quizzes on human anatomy and physiology.
6.5 Neurons & Synapses notes to complete (created by Mrs Green).
How do Nerves Carry Information? a 6m40s lesson from Naked Science Scrapbook.
In Crash Course Biology #26 – The Nervous System, Hank begins a series of videos on organ systems with a look at the nervous system and all of the things that it is responsible for in the body.
Fantastic animated tutorials from McGraw Hill Education – the Nerve Impulse, Action Potential propagation in unmyelinated axons, Voltage-gated channels & the action potential, Sodium-Potassium exchange pump, how it works & the sodium channel involved in nerve transmission. Also transmission across a synapse.
Lovely infographic – just click on it to enlarge.
How fast are your reactions? ReactionTimesLab. Test your reactions with Sheep or a stoplight. Here are some other methods from IQ tests or use the classic ruler drop method: instructions and how to make your own reaction timer.