- Inorganic ions
"For ions in inorganic compounds see
ionic compounds ."
Inorganic ions inanimal s andplants areion s necessary for vital cellular activity. In body tissues, ions are also known aselectrolytes , essential for the electrical activity needed to support muscle contractions and neuron activation. They contribute toosmotic pressure ofbody fluid s as well as performing a number of other important functions. Below is a list of some of the most important ions for living things as well as examples of their functions:* Ca>, Calcium is a component of
bone s andteeth . It is also functions as a biological messenger, as do most of the ions listed below. SeeCalcium deficiency * K+, Potassium ions' main function in animals is osmotic balance, particularly in the
kidneys . SeePotassium deficiency .* Na+, Sodium ions have a similar role to potassium ions. See
Sodium deficiency .* Mg2+, Most importantly, magnesium ions are a component of
chlorophyll . SeeMagnesium deficiency * Cl−, Inability to transport chloride ions in humans manifests itself as Cystic fibrosis
* CO32−, The shells of sea creatures are
calcium carbonate . In blood approximately 85% ofcarbon dioxide , is converted into aqueous carbonate ions (an acidicsolution ), allowing a greater rate of transportation.* PO43−,
Adenosine triphosphate is a common molecule which stores energy in an accessible form.Bone iscalcium phosphate .* Fe2/3+.
Haemoglobin , the main oxygen carrying molecule has a central iron ion.
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