Sodium in biology

The sodium–potassium pump, a critical enzyme for regulating sodium and potassium levels in cells

Sodium ions (Na+) are necessary in small amounts for some types of plants,[1] but sodium as a nutrient is more generally needed in larger amounts[1] by animals, due to their use of it for generation of nerve impulses and for maintenance of electrolyte balance and fluid balance. In animals, sodium ions are necessary for the aforementioned functions and for heart activity and certain metabolic functions.[2] The health effects of salt reflect what happens when the body has too much or too little sodium. Characteristic concentrations of sodium in model organisms are: 10 mM in E. coli, 30 mM in budding yeast, 10 mM in mammalian cell and 100 mM in blood plasma.[3]

  1. ^ a b Furumoto, Tsuyoshi (24 Aug 2011). "A plastidial sodium-dependent pyruvate transporter". Nature. 476 (7361): 472–475. doi:10.1038/nature10250. PMID 21866161.
  2. ^ Pohl, Hanna R.; Wheeler, John S.; Murray, H. Edward (2013). "Chapter 2. Sodium and Potassium in Health and Disease". In Astrid Sigel, Helmut Sigel and Roland K. O. Sigel (ed.). Interrelations between Essential Metal Ions and Human Diseases. Metal Ions in Life Sciences. Vol. 13. Springer. pp. 29–47. doi:10.1007/978-94-007-7500-8_2. PMID 24470088.
  3. ^ Milo, Ron; Philips, Rob. "Cell Biology by the Numbers: What are the concentrations of different ions in cells?". Retrieved 8 March 2017.

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