论文部分内容阅读
正常的消化与吸收人体的消化道有许多功能,运送食物、贮藏、消化和吸收食物消化后所产生的化合物、维生素和无机盐。胃可以贮存食物(达1公斤)以及混合和进一步消化食物。胃的分泌物包括粘蛋白、内因子、盐酸、无机盐、胃蛋白酶、胃蛋白酶原、胃解脂酶和蛋白质。内因子与维生素B_(12)结合,并促使其吸收。盐酸为胃蛋白酶提供了一个酸性的环境,使从胃腺的主细胞中分泌出来的胃蛋白酶能很快起作用,开始蛋白质的少量消化。胃蛋白酶和盐酸能破坏脂肪的细胞膜,使脂肪进行初步消化。高价铁与盐酸结合生成亚铁,它在十二指肠中易被吸收。
Normal digestion and absorption The body’s digestive tract has many functions, transporting food, storing, digesting and assimilating compounds, vitamins and inorganic salts produced by the digestion of food. The stomach can store food (up to 1 kg) and mix and further digest food. Stomach secretions include mucins, internal factors, hydrochloric acid, inorganic salts, pepsin, pepsinogen, stomach lipase and proteins. Internal factors and vitamin B_ (12) and promote its absorption. Hydrochloric acid provides an acidic environment for pepsin, allowing pepsin secreted from the main cells of the stomach glands to act quickly and begin a small digestion of the protein. Pepsin and hydrochloric acid can destroy the fat cell membrane, so that the initial digestion of fat. Iron and hydrochloric acid to generate ferrous iron, it is easily absorbed in the duodenum.