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Glossary of Physiology Terms
The main cation (positively charged ion) of the intracellular fluid.
) plays an important role in the action potential
of neurons and muscle cells.
The extracellular concentration of K+
is about 4 mM. The intracellular concentration of K+
is about 150 mM.
Posted: Wednesday, February 5, 2014
Last updated: Wednesday, February 5, 2014