Fig. 7.

The four simulations described in Fig. 3 showing changes in glomerular filtration rate (GFR), fractional Na⁺ reabsorption in the proximal tubule (PT FNaR), and concentration of Na⁺ in the macula densa during 3 wk of baroreflex activation. Simulations are 1) for normal conditions (normal), 2) without suppression of renal sympathetic outflow (renal clamp), 3) without changes in cardiac autonomic activity (cardiac clamp), and 4) without suppression of renal sympathetic outflow and without changes in cardiac autonomic activity combined (renal + cardiac clamp).