By Michelle Andrews. + More. This week's report linking higher blood sugar levels with lower brain function in people with type 2 diabetes probably sent many people to their computers to research ways to reduce their A1C levels, a measurement of average blood sugar over time.
Making the world better, one answer at a time. Anion means the ion has a negative charge. The most common extracellular anion in the human body is chlorine. Most common cations are sodium, potassium, and calcium.
What is the function of the sodium ion on the body? It is the primary cation in extracellular fluid. Sodium is important for maintenance of extracellular fluid volume through its effect on osmotic pressure - makes up about 90% of the solute in extracellular fluid. It is also essential in conduction of nerve impulses and muscle contraction.