from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The cytoplasm of an axon.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The cytoplasm of an axon
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.