<prompt> At what age extracellular fluid is equal to the intercellular fluid?14 days4 weeks2 months3 months  <response>: b. 4 weeksRef: Averys 8e p 373High Yield Points:In fetus newborn, ECF volume is larger than ICF volume.Normal postnatal diuresis causes an immediate decrease in the ECF volume.This is followed by continued expansion of ICF volume, which results from cellular growth.By 1 year of age, the ratio of the ICF to ECF volume approaches adult levels. 