肾小球滤出纳、水 99%99.5% 肾小、管重吸收 65%≈70% 近曲小、管吸收 0.5%~1% 滤出液排出 纳水潴留 Na*and water are retained by the kidney. 肾小球滤出钠、水 99％～99.5％ 肾小管重吸收 65％～70％ 近曲小管吸收 0.5％～1％ 滤出液排出 钠水潴留 Na + and water are retained by the kidney