| 查看: 1042 | 回复: 6 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
sgh_119至尊木虫 (职业作家)
|
[交流]
【Pure water】Why women live longer than men
|
||
|
It is the ultimate battle of the sexes - and women usually win. Now scientists have come up with a new theory for why woman live, on average, longer than men: men are more biologically ‘disposable’. The controversial theory, developed by Professor Tom Kirkwood of the University of Newcastle, suggests that the female body is better at carrying out routine maintenance and keeping the body’s cells alive. Professor Kirkwood believes there is now growing evidence to suggest that men are more disposable than women, because the cells of their bodies are not genetically programmed to last as long as they are in females. Many scientists believe that the aging process is caused by tiny faults throughout our body. As the tiny faults build up the length of our lives is determined by how quickly our body is able to carry out running repairs. As the cells miss opportunities to repair themselves our body gradually degrades until we eventually die. Professor Kirkwood’s theory behind why our cells do not mend every tiny problem in our body is that it is built into our DNA. The reason we do not live forever is because it would have cost our hunter-gather ancestors too much energy to constantly replenish cells when hunger was a more immediate danger, he says. ‘Under the pressure of natural selection to make the best use of scarce energy supplies, our species gave higher priority to growing and reproducing than to living forever,’ he writes in the magazine American Scientist. 'In humans, as in most animal species, the state of the female body is very important for the success of reproduction', he writes. ‘The foetus needs to grow inside the mother’s womb, and the infant needs to suckle at her breast. So if the female animal’s body is too much weakened by damage, there is a real threat to her chances of making healthy offspring. The man’s reproductive role, on the other hand, is less directly dependent on his continued good health.’ |
回复此楼» 猜你喜欢
本人考085602 化学工程 专硕
已经有23人回复
-
求调剂院校信息
已经有4人回复
-
085600材料与化工306
已经有4人回复
-
286求调剂
已经有10人回复
-
328求调剂，英语六级551，有科研经历
已经有9人回复
-
一志愿北京化工大学070300 学硕336求调剂
已经有4人回复
-
286分人工智能专业请求调剂愿意跨考！
已经有8人回复
-
资源与环境 调剂申请(333分)
已经有5人回复
-
280求调剂
已经有12人回复
-
269专硕求调剂
已经有5人回复
poyoro
木虫 (文坛精英)
- ESEPI: 13
- 应助: 3 (幼儿园)
- 贵宾: 1.05
- 金币: 1492.8
- 散金: 12871
- 红花: 23
- 沙发: 209
- 帖子: 10651
- 在线: 1172.7小时
- 虫号: 589231
- 注册: 2008-08-29
7楼2010-11-11 14:52:35
nono2009
超级版主 (文学泰斗)
No gains, no pains.
-
专家经验: +21105 - ESEPI: 1
- 应助: 28684 (院士)
- 贵宾: 513.911
- 金币: 2555230
- 散金: 27828
- 红花: 2148
- 沙发: 66666
- 帖子: 1602255
- 在线: 65200.9小时
- 虫号: 827383
- 注册: 2009-08-13
- 性别: GG
- 专业: 工程热物理与能源利用
- 管辖: 科研家筹备委员会
3楼2010-11-11 06:50:20
feng1205
木虫 (正式写手)
- 应助: 0 (幼儿园)
- 贵宾: 0.06
- 金币: 3919.1
- 帖子: 451
- 在线: 88.2小时
- 虫号: 498092
- 注册: 2008-02-03
- 专业: 凝聚态物性 II ：电子结构
4楼2010-11-11 10:34:00
xia_chong
金虫 (文坛精英)
- ESEPI: 43
- 应助: 0 (幼儿园)
- 贵宾: 1.591
- 金币: 10270.8
- 散金: 2377
- 红花: 34
- 沙发: 160
- 帖子: 12455
- 在线: 1941.8小时
- 虫号: 804303
- 注册: 2009-07-06
- 性别: GG
- 专业: 粒子物理学和场论
- 管辖: English Cafe
5楼2010-11-11 11:26:42
40