Q. INTERSALT is an international, standardized epidemiological study that has become the prime source of information on high-sodium diets and their relationship to hypertension and left ventricular hypertrophy (LVH). The study has shown that increased sodium intake results in hypertension despite population dynamics. In addition, multiple studies have shown that reducing sodium intake results in lower arterial pressures despite each patient’s hypertensive status. The renal system is a major player in the sodium-hypertension mechanism. Which of the following is a mechanism of how the kidney responds to high sodium intake?