Resting membrane potential: Difference between revisions
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The resting membrane potential of a neurone is when the net flow of [[Ions|ions]] across the [[Plasma membrane|plasma membrane]] equals zero. In humans this is said to be around -70mV<ref>Alberts B, Johnson A, Lewis J, Raff M, Roberts K, Walter P. (2008) Molecular Biology of the Cell, 5th edition, New York: Garland Science (page 669)</ref>. This means that the inside of the cell is negatively charged in comparison to the outside. Resting membrane potentials are maintained by two different types of ion channels | The resting membrane potential of a neurone is when the net flow of [[Ions|ions]] across the [[Plasma membrane|plasma membrane]] equals zero. In humans this is said to be around -70mV<ref>Alberts B, Johnson A, Lewis J, Raff M, Roberts K, Walter P. (2008) Molecular Biology of the Cell, 5th edition, New York: Garland Science (page 669)</ref>. This means that the inside of the cell is negatively charged in comparison to the outside. Resting membrane potentials are maintained by two different types of ion channels: the [[Sodium-potassium pump|sodium-potassium pump]] and the [[Sodium and potassium leak channels|sodium and potassium leak channels]]. The sodium-potassium pump moves three sodium ions out of the cell for every two potassium ions it moves into the cell. Therefore more positively charged ions are being removed from the cell than are entering it making the inside environment of the cell comparatively negative to the outside. | ||
=== References === | === References === | ||
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Revision as of 20:37, 4 December 2017
The resting membrane potential of a neurone is when the net flow of ions across the plasma membrane equals zero. In humans this is said to be around -70mV[1]. This means that the inside of the cell is negatively charged in comparison to the outside. Resting membrane potentials are maintained by two different types of ion channels: the sodium-potassium pump and the sodium and potassium leak channels. The sodium-potassium pump moves three sodium ions out of the cell for every two potassium ions it moves into the cell. Therefore more positively charged ions are being removed from the cell than are entering it making the inside environment of the cell comparatively negative to the outside.
References
- ↑ Alberts B, Johnson A, Lewis J, Raff M, Roberts K, Walter P. (2008) Molecular Biology of the Cell, 5th edition, New York: Garland Science (page 669)