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一、蛋白质的营养作用蛋白质是人体各种组织细胞的基本组成成份,人体组织蛋白每时每刻都在不断地进行分解代谢,同时产生能量,供机体利用,所以组织蛋白不断消耗,必须从食物中摄取一定数量的蛋白质补充消耗的蛋白质,维持人体组织的生长、更新、修补及与生命现象有密切关系的那些蛋白质如酶、各种蛋白类激素等。实验证明动物长期缺乏蛋白质是无法生存的,由此可见蛋白质是不能被糖和脂肪所代替的必须营养物质。
First, the nutritional role of protein Proteins are the basic components of various tissues and cells of the human body, human tissue proteins continue to be catabolized all the time, while generating energy for the body to use, so the continuous depletion of tissue proteins must be from the food In the intake of a certain amount of protein to replenish the consumption of protein, maintaining the growth of human tissues, renewal, repair and life-threatening phenomena are closely related to those proteins such as enzymes, various protein hormones. Experiments show that animals can not survive long-term lack of protein, which shows that protein can not be replaced by sugar and fat must be nutrients.