时间:2019-02-24 作者:英语课 分类:英语听力文摘 English Digest


英语课

The Parts of Metabolism

新陈代谢到底是什么?


What is metabolism really? Statements like “he can eat a lot because he has a fast metabolism” are somewhat misleading.


Metabolism isn’t about the digestion of food in your stomach; it’s the name given to all of the chemical changes that occur in an organism’s tissue cells. There are basically two kinds of chemical changes that can occur; tissue matter can be built, or it can be broken down.


These processes are called anabolism and catabolism. More specifically, anabolism is responsible for an organism’s growth, its maintenance 1, and the repair of its tissues. So when you cut yourself and your skin scabs over and heals, you’re seeing anabolism at work. Or if you grow taller or wider, that’s also evidence of anabolism.


In order to build tissue and repair it, however, anabolism requires energy, as well as material with which to build. This energy and building material comes from the breaking down of larger, more complex material, a process called catabolism. As well as producing energy and building material, catabolism also breaks down material for excretion from the body.


Both anabolism and catabolism are necessary for survival 2 and good health. Understanding these processes can help one make good decisions about exercise and diet. For example, when an athlete trains, her muscle fibers 3 break down. However, the daily recommended amount of protein is all that is needed to meet the anabolic and catabolic needs of the body and thus repair muscles fibers.









新陈代谢是什么?“他很能吃是因为他新陈代谢很快”像这样的说法有点误导我们。


新陈代谢不是指食物的消化能力,而是指一种在组织细胞内发生的化学变化。基本上可分为两类化学反应:合成或分解组织细胞。


这些过程叫作合成代谢和分解代谢。具体地说,合成代谢负责有机组织的数量增长,维护和修复。所以,当皮肤割伤后会自动结疤愈合,这就是合成代谢在起作用。或者长高长胖,那也是合成代谢。


要建造和修复组织细胞,合成代谢需要能量和原料。而能量和原料就来自于分解更大,更复杂的细胞,这个过程就叫分解代谢。与合成反应一样,分解代谢需要的能量和原料来自于身体的分泌物。


合成和分解代谢在对于身体健康很重要。而了解这些过程可以帮助我们对运动和饮食做出更好的决定。例如,运动员训练时他的肌纤维会受损。所以每日推荐的蛋白质就是身体合成和分解代谢所需的量,这样才能修复肌纤维。


 




 



n.维修,保养,扶养费,维持,保持
  • His small farm provides maintenance,but not much more.他的小农场能使他们维持生活,但仅此而已。
  • He has to pay maintenance to his ex-wife.他必须给前妻赡养费。
n.留住生命,生存,残存,幸存者
  • The doctor told my wife I had a fifty-fifty chance of survival.医生告诉我的妻子,说我活下去的可能性只有50%。
  • The old man was a survival of a past age.这位老人是上一代的遗老。
光纤( fiber的名词复数 ); (织物的)质地; 纤维,纤维物质
  • Thesolution of collagen-PVA was wet spined with the sodium sulfate as coagulant and collagen-PVA composite fibers were prepared. 在此基础上,以硫酸钠为凝固剂,对胶原-PVA共混溶液进行湿法纺丝,制备了胶原-PVA复合纤维。
  • Sympathetic fibers are distributed to all regions of the heart. 交感神经纤维分布于心脏的所有部分。
学英语单词
adarism
air patterns
air-inflated structure
analytical liquid chromatograph
anhad
antitrinitarians
Arabically
arcidaes
Ashby de la Zouch
axinost (or axonost)
Babo's psammism
Balmain, Pierre (Alexan dre)
be at bat
blazing star
break faith with
callogobius sheni
Camarillas, Embalse de
carbon bit
carrhotus xanthogramma
certificate of expenditure
checking for leaks
chlorcresol
cicatricial fibromatosis
computer system validation
concurrent validity
cost-justified
cranked spanner
cystic dilatation
deamochore
deferred demand as a determinant
Dethyron
deutsch-jozsa algorithm
digital data encoding
disfranchises
display pedestal
dominatours
dorsocentral region
dreaper & tompkins process
drivis
due payment
dunchurches
exit time
express consideration
Fiat-Chrysler
flashlight battery
folding nucleus
futures non-clearing dealer
genus dendrocalamuss
glomerid
greyeyes
hardfaced
hiding declaration
humid temperate climate
hump resonance
iceways
ICOSC
immuno-fluorescence
independent form description language
ingot pit
intermittent manual blowdown
Keping
Kioto
lavage cytologic examination
lieber Gott
light rose
logical escape symbol
Lolworth
longitudinal-stress
Maccas
menued
mould life
multiple completion packer
outwearied
parasitic prosopopagus
phase correction
portrait painter
pressing-in method
pressure cabin examination
purposive behaviour
quinine acid sulfate
raceophenidol
radio sounding
random fixation of gene
relationship material
reporters committee for freedom of the press
reservoir filter
resident certificate
rhythmeur
savannah
scavenging material
sonic and ultrasonic applications
tachometry
technical analyses
torpedo gunner's mate
Tudoresque
twibilled
unenrolls
unilingualdictionary
unlocking yoke cam driving wheel
venous
width of sowing
zero milk