Nervous system signals are transmitted electrically along individual neurons, but neurons are separated from each other by a tiny gap. Chemical messengers called neurotransmitters cross the gap between neurons. Neurotransmitters fit into...

Messages within the brain and the rest of the nervous system are sent very rapidly. These messages are conducted by cells called neurons. Neurons are specialized to receive and transmit message and neurons are connected in networks. In...

Nervous system messages are sent as electrical signals along the length of axons and dissolved salts are important for electrical signaling in cells. In this lesson students are introduced to this concept by creating an electrical...

Build nerve cell models in cooperative groups, and articulate the structure and function of nerve cells to explore the nervous system. Describe specific elements of human physiology by "advertising" the nervous system in nerve cell...

This lesson describes the function and components of the human nervous system. It helps young scholars understand the purpose of our brain, spinal cord, nerves and the five senses. How the nervous system is affected during spaceflight is...

How does the sense of touch work? Is the sense of touch more sensitive in some parts of the body, such as fingertips, than in others? In this lesson students explore the sense of touch by identifying mystery objects with their eyes...

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...