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饮食养生:胆汁的主要生理功能是什么

胆汁由胆盐、胆色素、胆固醇、卵磷脂、钾、钠、钙等组成,但胆汁中无消化酶。

Bile is composed of bile salt, bile pigment, cholesterol, lecithin, potassium, sodium and calcium, but there is no digestive enzyme in the bile.

成人每日胆汁分泌量约800——1000ml。

The amount of bile secretion in adults is about 800-1000 ml.

高蛋白食物可使胆汁分泌量增多。

High protein food can increase bile secretion.

胆盐因其分子结构的特点,当达到一定浓度后,可聚合而形成微胶粒。

Due to its molecular structure, bile salts can polymerize to form micelles after reaching a certain concentration.

因此,胆盐便成了不溶于水的脂肪水解产物到达肠粘膜表面所必需的运载工具,对于脂肪消化产物的吸收具有重要意义。

Therefore, bile salt is the necessary vehicle for the water-insoluble fat hydrolysate to reach the surface of intestinal mucosa, which is of great significance for the absorption of fat digestion products.

脂溶性维生素(维生素a、d、e、k)和胆固醇也可溶于微胶粒中而被吸收。

Fat soluble vitamins (vitamins A, D, e, K) and cholesterol can also be absorbed in the microcapsules.

胆汁通过促进脂肪分解产物的吸收,对脂溶性维生素(维生素a、d、e、k)的吸收也有促进作用。

Bile can also promote the absorption of fat soluble vitamins (vitamin A, D, e, K) by promoting the absorption of fat decomposition products.

此外,在十二指肠内胆汁还可中和一部分胃酸;胆盐还是促进胆汁分泌的一个体液因素。

In addition, bile can neutralize some gastric acid in duodenum; bile salt is also a humoral factor to promote bile secretion.

此外,胃粘膜具有很强的对抗酸侵蚀的能力,但可因反流胆汁抑制粘液分泌使凝胶层变薄而减弱,十二指肠粘膜则因胆汁可以中和部分胃酸而抑制相反。

In addition, the gastric mucosa has a strong ability to resist acid attack, but it can be weakened by reflux bile inhibiting mucus secretion and thinning the gel layer. The duodenal mucosa is inhibited by bile neutralizing part of gastric acid.

因此,若胃排空长期太快;易导致十二指肠溃疡;而十二指肠内容物经常发生反流,则易导致胃溃疡。

Therefore, if the gastric emptying is too fast for a long time, it is easy to lead to duodenal ulcer, and duodenal contents often reflux, it is easy to lead to gastric ulcer.

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