Physiology General 3690571a About Sodium, true: A Normal serum level is 135-145 mEq/L B Daily intake is 150 mmol of NaC1 C Major poion is extra cellular D All High-Yield Explanation A i.e. Normal serum level is 134- 145 m eq/lit; B i.e. Daily intake is 150 mmol of NaCl; C i.e. major poion is extracellular