Inorganic ions

• Inorganic ions occur in solution in the cytoplasm and body fluid organisms, some in high concentrations and other in very low concentrations.
• Hydrogen Ions H+ which determine the pH of substances such as blood - the higher the concentration of hydrogen ions the lower the pH.
• Iron ions Fe2+ are a component of haemoglobin which is an oxygen carrying molecule in red blood cells.
• Sodium ions Na+ are involved in co-transport of glucose and amino acids.
• Phosphate ions PO4 3- are a component of DNA and ATP.