primary regulator of extracellular fluid volume is:
A)chlorine.
B)sodium.
C)magnesium.
D)potassium.

Question

Quizplus · Accepted Answer

Sodium is the primary regulator of extracellular fluid volume because it is the most abundant cation in extracellular fluid and its concentration directly affects the volume of extracellular fluid. Sodium is the primary regulator of extracellular fluid volume as it is the major cation in the extracellular fluid and water follows its movement due to osmotic pressure. Chlorine is also important in maintaining fluid balance but it acts as an anion to balance the positive charge of sodium. Magnesium and potassium are important for various physiological processes but they are not the primary regulators of extracellular fluid volume.

Primary Regulator of Extracellular Fluid Volume Is