The primary regulator of extracellular fluid volume is:

Question

Quizplus · Accepted Answer

The primary regulator of extracellular fluid volume is sodium. This is because changes in the amount of sodium in the extracellular fluid compartment can lead to changes in water balance and therefore affect extracellular fluid volume. Sodium is also the main cation in extracellular fluid and is involved in many physiological processes such as nerve impulse transmission and muscle contraction.

The Primary Regulator of Extracellular Fluid Volume Is