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Neurons (also called nerve cells) are the basic building blocks of the nervous system.

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But isolated from one another, neurons would not enable you to see, think, react to the world, or act upon it.

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When psychologists study behavior or mental processes, they are really looking

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at the combined responses of a vast web of billions of neurons that are in constant communication.

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This activity examines the way a neuron passes information (neural impulses)

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within its own cell and the way it relays messages to other neurons.

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Neurons can be classified into three broad groups, according to the way in which they transmit messages within the body.

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Sensory neurons carry information from the body's tissues and organs to the central nervous system.

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Interneurons in the brain and spinal cord link the sensory and motor neurons.

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They do the additional processing of the information needed to make sense of the events occurring within your body and outside in the environment.

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Motor neurons carry instructions from the central nervous system to the body's muscles, organs, and tissues.