關於過量飲水既影響

點解飲水過多會中水毒?

正常成年人每天水的需要量約爲２５００毫升，而兒童生長代謝旺盛，加之組織細胞增生時蓄積水分多，故需水量比成人多，一般每公斤體重需水約５０～１６０毫 升。然而兒童的各水代謝器官功能還未完善，調節和代償功能差，容易出現水代謝障礙，若讓孩子喝水過多則會影響其健康。　　造成水中毒：兒童若１次或多次飲 用過多的水，而腎髒對過多的水分又未能及時排出，便會引起水在體內瀦留，先是細胞外液滲透壓降低，繼而水分進人細胞內，導致細胞內、外液滲透壓降低。此時 輕者可出現頭昏腦脹、疲乏懶動；重則出現神志恍惚、意識障礙。　　引起胃腸功能紊亂：兒童劇烈活動後立即喝水易引起胃腸損傷或功能紊亂。因劇烈活動後胃腸 道血管處於收縮狀態，大部分血液集中到肌肉中去，大量喝水後水分在胃腸道積聚，會使人産生悶脹感。由于水分過多，沖淡了胃內消化液，使消化功能減退，食欲 降低，久而久之，還會引起胃粘膜病變。　　增加心、腎髒負荷：喝水過多，使血容量急劇增加，正在工作的心髒負擔加重，須進行強有力收縮才能代償。而腎髒在 短時間內排泄出較多水分，亦會消耗能量。反複如此工作，心、腎也會"疲勞"，使其功能減退。　　引起尿頻和遺尿症：兒童（特別是嬰幼兒）排尿的調節功能還 不穩定，若喝水太多，可使排尿"開關"失靈，導致尿頻或遺尿。兒童在欲排尿時受到懲罰不能及時排尿，還可出現神經性排尿困難。家長對兒童飲水量應適當控 制，根據兒童心理需要量，一般每日飲水量應爲：１歲以下約７００毫升左右；２－３歲７８０毫升左右；４－７歲約９５０毫升左右；８－９歲約１０５０毫升左 右；１０－１４歲約１１００毫升左右，其餘可從食品中獲得。此外應根據氣候、季節、活動強度等情況酌情調整。

點解一次過飲得太多水會中水毒嫁???

drink too much water:
kidneys cant cope with the excess amount of water in the body
so body will swells up (odema)
yes if not treated patient will die.
solution:
drugs called diuretics
they get rid of water inside body
and also stop drinking water!
or increase metabolism, for example exercise, to increase sweating. (but i doubt u can move much when the person would be full of water!)
go to a steam room, sauna room, increase sweating might help.

PS .be careful when taking diuretics because many of them also takes away potassium, and you may get hypokalaemia (low potassium) as a results, there are some diuretics that are potassium sparing. need to ask doctors for further information
hope that helps

影響健康啦!!同會水腫!!!!