Navigation Menu Search PhysiologyWeb
PhysiologyWeb Logo
PhysiologyWeb
  Home  |  FAQ  |  About  |  Contact  |   - Sign In
 Search PhysiologyWeb
   
Home > Glossary > P > Potassium

Glossary of Physiology Terms -
Potassium

— share —
Share on Facebook    Share on X    Share on LinkedIn    Share on Pinterest    Share on Reddit    Email    Copy URL

Potassium

Abbreviation:
K+

Definition:
The main cation (positively charged ion) of the intracellular fluid.

Potassium (K+) 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, March 12, 2025
— share —
Share on Facebook    Share on X    Share on LinkedIn    Share on Pinterest    Share on Reddit    Email    Copy URL