新陈交替的解释 「陈」和「旧」两字相通，新陈交替亦作新旧交替，而楼上网友写作新陈代谢其实都可以，意思都差不多。 在生物范畴则指生物体从外界取得生活必须的物质，通过物理化学作用变成生物体的有机组成部分。供给生长、发育，同时产生能量维持生命活动，并排除废物的过程。 而在哲学范畴则指新事物代替旧事物的过程。任何事物的内部都有其新旧两方面的矛盾，形成为一系列曲折的斗争。斗争和交接的结果，新的方面由小变大，上升为支配的部分，相反旧的方面则由大变小，变成逐步归于灭亡的部分。而当新的部分取代旧的部分支配者地位的时候，旧事物的性质就变化成为新事物的性质。 希望可以帮到你！ 图片参考：.yimg/iugc/rte/ *** iley_35
参考: 商务新词典
新陈代谢呀 Metaboli *** is the set of chemical reactions that occur in living ani *** s in order to maintain life. These processes allow ani *** s to grow and reproduce
maintain their structures
and respond to their environments. Metaboli *** is usually divided into o categories. Cataboli *** breaks down large molecules
for example to harvest energy in cellular respiration. Anaboli ***
on the other hand
uses energy to construct ponents of cells such as proteins and nucleic acids. The chemical reactions of metaboli *** are anized into metabolic pathways
in which one chemical is trformed into another by a sequence of enzymes. Enzymes are crucial to metaboli *** because they allow ani *** s to drive desirable but thermodynamically unfavorable reactions by coupling them to favorable ones. Enzymes also allow the regulation of metabolic pathways in response to changes in the cell's environment or signals from other cells. The metaboli *** of an ani *** determines which substances it will find nutritious and which it will find poisonous. For example
some prokaryotes use hydrogen sulfide as a nutrient
yet this gas is poisonous to animals.The speed of metaboli ***
the metabolic rate
also influences how much food an ani *** will require.