This is a thorough description of chemical synapses and their role in nerve cell communication. Topics include structure and types of synapses.

York University provides a good graphic and description of the synapse and its function.

[Free Registration/Login may be required to access all resource tools.] In this online tutorial students will explain how nerve impulses are transmitted.

This resource provides information about brain evolution and development.

Great page, gives both a basic and an in depth definition of synapses. Good graphics and descriptions.

See how electrical and chemical signals are used by neurons to communicate with one another at synapse contact points. [1:09]

Using an interactive demonstration, this educational site provides a glimpse into how illicit drugs disrupt the synapse through unique molecular mechanisms causing the drug user to feel 'high'.

This online biology book chapter offers definitions and descriptions of the nervous system's components.

Take a glimpse at the way normal brains work and about brain disorders. Learn how research and technology help us learn about the fundamental molecular workings of the brain.

A curriculum that explains how mental illness can be treated and cured. The site offers a web version of the curriculum or printed supplements can be requested. Included is a teacher's guide.

This is a five-question quiz concerning synaptic transmission between neurons.

This article explains how the nervous system transmits signals along and between neurons.

This video explores how nerves, neurons, and nerve receptors work in the human body and how they communicate by electrical impulses. [5:00] Followed by a short quiz and a list of additional resources to explore.

Neurotransmitters can either stimulate the next neuron to send a signal or inhibit that neuron from sending a signal. Certain chemicals change the way signals are sent and received. In this lesson students will understand this concept by...

In this activity, students design and build neuron models based on observations made while viewing neurons through a microscope.

In this lesson on the brain's neural networks, students investigate the structure and function of the neuron. They discover ways in which engineers apply this knowledge to the development of devices that can activate neurons. Includes...

Wikipedia offers an overall description of neurons. This site describes their physical appearance, the different parts of neurons, and what their functions are.

Newton's Apple informational site on reflexes. Includes vocabulary, resources, and several hands-on activities.

An easy to understand article on the history of brain study.

This slideshow explains the process of how a neuron communicates.

[Free Registration/Login may be required to access all resource tools.] Discusses how nerve impulses are transmitted.

[Free Registration/Login may be required to access all resource tools.] The nervous system is made up of nerves. A nerve is a bundle of nerve cells. A nerve cell that carries messages is called a neuron. The messages carried by neurons...

A slide show presentation introducing the facts about the human nervous system.

This lesson provides an overview that explains the nervous system in humans. It is 3 of 4 in the series titled "Animals: Human Nervous System."