Which mineral is a major component of extracellular fluid and an important regulator of fluid balance?

Question

Quizplus · Accepted Answer

Sodium is a major component of extracellular fluid and an important regulator of fluid balance. Fluoride is not a major component of extracellular fluid and does not regulate fluid balance. Vitamin D is not a mineral and has no direct role in fluid balance. Iron and calcium are minerals, but they are not major components of extracellular fluid and do not regulate fluid balance as directly as sodium.

Which Mineral Is a Major Component of Extracellular Fluid and an Important