<prompt> Non-respiratory function of lungs ?Anion balanceSodium balancePotassium balanceCalcium balance  <response>: Ans. is b i.e., Sodium balanceRef: Lecture notes on human physiology 4the p. 400One of the most impoant metabolic non-respiratory function of lungs:As a pa of renin-angiotensin-aldosterone system, lungs indirectly regulate sodium and water balance and BP.However, lungs also directly affect Na balance is epithelial Na channels E NaCs. 