我們饮食,会感觉到各种滋味,这是由于舌部的味觉神经受到化学的或物理的刺激而引起的。通常,我們所讲的营养成份是指蛋白质、脂肪、碳水化合物(醣类)、維生素、无机盐及水等。但是,如果仅将这些营养物质,簡单的混合起来,供飲食时,未必就能达到营养的目的。为什么呢?这里牵涉到食味的問題。从巴甫洛夫的高級神經活动学說知道,人的饮食是一个极复杂的过程。在这个过程中,从体外的視觉、听觉、嗅觉和味觉一 Our diet will feel a variety of tastes because of the chemical or physical stimulation of the tongue’s taste nerves. In general, the nutrients we talk about are proteins, fats, carbohydrates (sugars), vitamins, inorganic salts, and water. However, if only these nutrients are simply mixed together and eaten, they may not be able to achieve the purpose of nutrition. Why is it? This involves the issue of taste. According to Pavlov’s advanced neurological theory, the diet of human beings is a very complicated process. In this process, visual, auditory, sense of smell, and taste