我们常常可以看到一些拿着馒头或面包边走边吃的孩子。他们多来自双职工家庭,早晨父母顾不上让孩子好好吃一顿早饭。有些家长以为:早饭凑合一下,中午吃得好一些就补上了。其实,这样做对儿童和青少年的学习和身体发育都是十分不利的。我们知道:学校里把主要课程都安排在上午,所以学生的身体特别是大脑在上午需要的能量特别多。能量来源于体内葡萄糖的氧化。如果早餐不足,一、二节课后就没有食物可继续提供能量了,这时不但孩子饥肠辘辘,注意力不易集中,而且身体为了维持一定的血中葡萄糖水平,就开始“吃”自己了;动用肝脏细胞中的肝糖元,把它分解成葡萄糖以供应大脑等器官生理活动的需要;动用肌肉组织中的肌糖元来满足肌肉本身的能量需要。在饥饿状况下,脂肪的动用增加,组 We can often see some children walking around eating bread or bread. Most of them come from double-family workers, parents in the morning attend to let their children eat a good breakfast. Some parents think: make up for breakfast, eat better at noon to make up. In fact, doing so is very unfavorable for the learning and physical development of children and adolescents. We know that the main courses are arranged in the school in the morning, so the body of a student, especially the brain, needs a particularly high amount of energy in the morning. The energy comes from the oxidation of glucose in the body. If breakfast is not enough, one or two after class no food can continue to provide energy, then not only children hungry, attention is not easy to concentrate, and the body in order to maintain a certain blood glucose level, began to “eat” themselves; Use liver glycogen in liver cells, decompose it into glucose to supply the physiological functions of the brain and other organs; muscle glycogen in muscle tissue to meet the energy needs of the muscle itself. In starvation conditions, increased use of fat, group