论文部分内容阅读
哪里有水,哪里就有生命,生命越旺盛需要水越多,这是众所周知的。如胚胎水占体重的90%,新生儿占80%,生后一月占75%,婴儿占70%,学龄儿童占65%,成人占60%,而老年人只占体重的50%左右。随着增龄,体内水减少,是老年人一个特点。老年人体内水为什么会减少呢?其机理目前还不十分清楚。但是,有两点是明显存在的,一是肾脏浓缩功能减退。青年人能把尿液浓缩至1200mosm/L,而老年人只能浓缩至800mosm/L。这就是说,要排出相同的溶质,老年人要比青
Where water, where there is life, the more vigorous life requires more water, it is well known. Such as embryonic water accounts for 90% of body weight, 80% of newborns, 75% of births in January, 70% of infants, 65% of school-age children, adults accounted for 60%, while the elderly accounted for only about 50% of body weight. With aging, reducing body water, is a feature of the elderly. Why the elderly body of water to reduce it? The mechanism is not yet very clear. However, there are two obvious points, one is the decrease of renal concentration function. Urine can be concentrated to 1200 mosm / L by young people, while the elderly can only concentrate to 800 mosm / L. This means that to discharge the same solute, the elderly should be more than youth