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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R

Reflex Arc

a neural circuit that travels through the spinal cord but does not require the coordination of the brain; allows for reflex actions

Refractory Period

the period of time during which the threshold required for the generation of an action potential is much higher than normal

Resting Potential

the voltage difference across a nerve cell membrane of an unstimulated neuron, usually negative