− | Potassium has many functions, notably in '''acid-base regulation, nerve impulse transmission, muscle contraction, and carbon dioxide and oxygen transport'''. It is also an '''activator or cofactor''' in many enzyme reactions. | + | Potassium has many functions, notably in '''acid-base regulation, nerve impulse transmission, muscle contraction, and carbon dioxide and oxygen transport'''. It is also an '''activator or [[Nutrition Glossary#Cofactor|cofactor]]''' in many enzyme reactions. |