- Greek axōn + -plasm. (American Heritage® Dictionary of the English Language, Fourth Edition)
“They proposed three hypotheses for why the membrane potential reverses during a spike: Anion hypothesis: the active membrane becomes selectively permeable to anions which are present in the axoplasm, but are in low or zero concentration in sea water; Inductance hypothesis: the membrane plays the role of an inductor.”
“The Anion Hypothesis There are certain organic anions present in the axoplasm of a neuron but absent from the extracellular ﬂ uid.”
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