sodium ion
Table salt cation
A sodium ion is a sodium atom that has lost an electron, giving it a positive electrical charge.
Written as Na⁺ in chemistry, sodium ions are essential to biological processes—nerve impulses, muscle contractions, and fluid balance all depend on sodium ions moving across cell membranes.
The doctor said my sodium ion levels were low.
- potassiumNineteenth element, symbol K
- electrolyteConductive dissolved substance
- channelPassage for transmission
- membraneThin tissue sheet
- nerveSignal-carrying body fiber
impulse · salt · brine · salt water · pump · gradient · cell · nerve impulse · synapse · muscle contraction · action potential · depolarization · current · electrical signal · charge · positive · saline · table salt