题目

兴奋在中枢神经系统的传导过程中，有时存在一个突触引起的兴奋被后一个突触抑制的现象。下图是突触2抑制突触1兴奋传导的过程示意图，请回答： （1）图中没有体现的内环境构成部分是________________________。 （2）图中a段表示_____________电位，b点时膜外是___________电位。 （3）甘氨酸（Gly）在中枢神经系统中可作为神经递质，它的受体是膜上某些离子的通道。当兴奋抵达时，贮存在___________________________内的Gly释放出来，并与分布在__________________上的GGetting Along Well With ParentsGetting along well with parents is a big problem for most teenagers. Teenagers are gradually getting more mature---or at least they think they are. So they can’t wait to get themselves free from their so—called bondage. Their parents are in their 40s and they are annoyed by their aging. ____【1】___. But people prefer harmony. How can we achieve it? Here are some tips:First and foremost, _____【2】______. We can’t be sure if we are created by God, yet people worship him, but we are absolutely sure that our parents created us. Isn’t a good enough reason why we should respect them?What’s more, ______【3】______. We can’t just take their payment for granted or become apathetic to their kindness. We are always impressed by strangers’ occasional kindness. How can we be insensitive to our parents who worry about us all the time?In addition, don’t forget to communicate with your parents. _______【4】______. For example, they may read our private diaries or follow us everywhere even to the bathroom. This will definitely cause strife in the family.Last but not the least, _______【5】_______. It may be difficult at first, but once you do it, your parents’ actions will suddenly be clear.If parents and teenagers work a little more we can all get something back.A. we need to switch places with our parents.B. As we get older, we begin to realize that our parents are not as perfect as we thought.C. That’s why people say families at this time are a confrontation between adolescence and the climacteric.D. we must respect our parents from the bottom of our heart.E. Gradual disappointment with patents is , in some degree, inevitable.F. If we refuse to communicate with them, parents will fell so frustrated that they will do anything they can to know us.G. it’s important to be grateful to our parents.