胆汁的作用主要是由于胆盐或胆酸的作用。胆盐的重要作用之一是作为乳化剂以乳化脂肪,这个作用是属于物理性消化或是化学性消化?在教学实践中常常出现这个问题,往往被少数人理解错。我认为胆盐的乳化作用属于物理性消化。大家知道,食物的消化包括物理性消化和化学性消化,换句话说,食物在消化道中的变化包含着物理性变化和化学性变化。确立这两种变化的基点是食物变化时是否生成了其它物质,如果食物变化时生成了其它物质,为化学性变化,没生成其它物质为物理性变化。我们把通过消化酶对食物的分解作用叫做化学性消化,是因为食物经 The role of bile is mainly due to the role of bile salts or bile acids. One of the important roles of bile salts is to emulsify fat as an emulsifier. Does this function belong to physical digestion or chemical digestion? This problem often occurs in teaching practice and is often understood by a few people. I think the bile salt emulsification belongs to the physical digestion. As we all know, the digestion of food includes physical digestion and chemical digestion. In other words, food changes in the digestive tract involve both physical and chemical changes. The basis for establishing these two changes is whether other substances are produced when the food is changed, and if the food is changed, other substances are generated, which are chemical changes and do not generate other substances as physical changes. We call the digestion of food by digestive enzymes chemical digestion, because the food by