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1 钾的正常代谢 1.1 钾在体内的含量与分布 钾的原子量为39.10。是体内重要阳离子之一。在健康成年人每公斤体重约含钾50mmol.若体重为70kg.体内含钾总量为3500mmol,即136.8g。 钾在体内的分布:钾主要存在于细胞内,因细胞种类不同,其中含钾量亦异,约在140～150mmol/L之间。只有2％的钾在细胞外液.约65mmol。正常人血清钾为3.5～5mmol/L。细胞内外钾的浓度之所以有如此巨大的差别,主要由于Na-K ATP酶的作用。其余对其发生影响的因素有:H~+、血浆中的胰岛素、肾上腺素、醛固酮等。
1, the normal metabolism of potassium 1.1 potassium in the body content and distribution of potassium atomic weight is 39.10. Is one of the important cations in the body. In healthy adults about kilograms of body weight potassium 50mmol. If the weight of 70kg. The total amount of potassium in the body is 3500mmol, or 136.8g. Distribution of potassium in the body: potassium is mainly present in the cells, because of different types of cells, of which potassium is also different, about 140 ~ 150mmol / L between. Only 2% potassium is in the extracellular fluid, about 65 mmol. Normal serum potassium 3.5 ~ 5mmol / L. The reason why there is such a huge difference in intracellular and extracellular potassium concentrations is mainly due to the action of Na-K ATPase. The rest of the impact on its factors are: H ~ +, plasma insulin, epinephrine, aldosterone and so on.