Thefunctionofnatriureticpeptidesistoregulatebloodpressure,electrolytebalanceandfluidvolume.BNPisproducedprimarilybytheventricleinresponsetopressureandstretchandfunctionstocounteractthevasoconstrictiveeffectsoftherenin-angiotensinaldosteronesystem(RAAS)onincreasingbloodpressureandretainingsaltandwater