Glossary 4.2

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The glossary provides definitions and explanations of key terms and concepts essential to understand the topic in the lesson. Be sure to familiarize yourself with each term before attempting the lesson glossary quiz..

Browse the glossary using this index

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A

Action Potential

the voltage difference across a nerve cell membrane when the nerve is excited

Afferent Neuron

a neuron that carries impulses from sensory receptors to the central nervous system; also called a sensory neuron

Axon

an extension of cytosol that carries nerve signals away from the nerve cell body