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Characterized by either a complete response or by a total lack of response or effect, depending on the strength of the stimulus. Neurons have an all-or-none response to impulse transmission and cannot be partially stimulated.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Word of The Day
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Heroes are created by popular demand, sometimes out of the scantiest materials, or none at all.
Gerald W. Johnson
Supreme power rests in the will of all or of the majority.
The great must submit to the dominion of prudence and of virtue, or none will long submit to the...