这是发生的事情:与肺组织相比,淡水是低渗的。当水进入细胞时,会导致细胞膨胀。一些肺细胞可能会爆裂。由于肺部的毛细血管暴露在淡水中,水会进入血液,稀释血液。这导致血细胞破裂(溶血)。升高的血浆K +(钾离子)和降低的Na +(钠离子)水平可能会扰乱心脏的电活动心脏,引起心室颤动。离子不平衡引起的心脏停搏可能在短短两到三分钟内发生。即使你在水下的最初几分钟存活下来,肾脏爆裂的血细胞也可能发生急性肾功能衰竭。如果你淹没在冷淡水中,当水进入你的血液时温度变化甚至可能使你的心脏冷却到足以导致心脏停止低温。另一方面,在盐水中,冷水不会进入血液,因此温度的影响主要限于皮肤的热量流失。

新西兰梅西大学生物论文代写:肾脏爆裂

This is what happens: fresh water is hypotonic compared to lung tissue. When water enters the cell, it causes the cell to swell. Some lung cells may burst. As the capillaries in the lungs are exposed to fresh water, the water enters the bloodstream and dilutes the blood. This causes blood cells to rupture (hemolysis). Elevated plasma K + (potassium ions) and decreased Na + (sodium ion) levels may disturb the heart’s electrically active heart and cause ventricular fibrillation. Cardiac arrest caused by ion imbalance can occur in as little as two to three minutes. Even if you survive the first few minutes of underwater, acute renal failure can occur in blood cells that burst from the kidneys. If you are drowning in cold water, temperature changes as the water enters your blood may even cool your heart enough to cause the heart to stop crying. On the other hand, in saline, cold water does not enter the blood, so the effect of temperature is mainly limited to the loss of heat from the skin.

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