Fig. 1. A) Changes in mean arterial blood pressure in response to saline infusion and sodium and volume depletion in normotensive (white bars) and hypertensive individuals (black bars). B) Changes in mean arterial blood pressure as a function of age in normotensive (white bars) and hypertensive individuals (black bars). C) Changes in mean arterial blood pressure in white male (WM), white female (WF), black male (BM), and black female (BF) individuals in the normotensive and hypertensive groups. Reprinted with permission from Weinberger et al. [14].