肾脏是维持机体钠平衡及细胞外液量相对恒定的关键脏器。随着衰老的发生,肾脏的结构、功能以及神经体液调节机制都发生了变化,使得老年人的钠代谢具有与年轻人完全不同的特点。老年人的肾脏改变人到老年,肾脏的重量和体积减少,硬化的肾小球逐年增多,部分肾小球代偿肥大,使功能健全的肾小球明显减少;肾小管萎缩、数目减少,远曲小管可扩张或有 The kidneys are the key organs that maintain the balance of sodium and the extracellular fluid in the body relatively constant. With the occurrence of aging, the structure and function of the kidney and neurohumoral regulation mechanisms have changed, making the elderly with very different characteristics of young people with metabolic sodium. Elderly people change the age of the elderly to the elderly, kidney weight and volume reduction, sclerosis of the glomeruli increased year by year, part of the glomerular compensatory hypertrophy, so that the function of a clear reduction of glomerular; tubular atrophy, the number decreased, far Tubular tubules can be expanded or have