What are anions?

Anions are defined as negatively charged ions. This classification arises from the gain of one or more electrons, which gives the ion its negative charge. In the context of chemistry and biological systems, anions play crucial roles in various physiological processes, including maintaining fluid balance, regulating pH levels, and facilitating nerve impulse transmission.

Understanding the nature of anions is essential, especially in fields such as hemodialysis, where the balance of electrolytes, including anions, directly impacts patient health. For instance, common anions in human physiology include bicarbonate, chloride, and phosphate. The presence and concentration of these anions are monitored closely in patients undergoing dialysis to ensure proper metabolic function and to prevent complications related to electrolyte imbalances.