首页
登录
职称英语
Scientists have learned more about the way cancer spreads from one place in
Scientists have learned more about the way cancer spreads from one place in
游客
2023-07-26
15
管理
问题
Scientists have learned more about the way cancer spreads from one place in the body to another. Once it spreads, it gets more difficult to【B1】______.
Cancer is a disease of uncontrolled .cell growth. 【B2】______thinking is that cells simply break off the main cancer, travel through the blood and grow in other organs.
But the new【B3】______ suggest there is more to this process. Researchers found that cells from the main tumor send out messengers. These prepare the new organ for a【B4】______ tumor.
It works this way. The primary tumor releases proteins called growth factors into the blood. They【B5】______ cells at the target organ to produce a sticky protein, called fibronectin. Fibronectin attaches to the surface of bone marrow cells. The result is a kind of【B6】______ area for cancer to arrive and grow into a secondary tumor.
The bone marrow cells help make vessels for blood to pass through and【B7】______ the cancer cells. The researchers believe that without the bone marrow cells, the tumors could not land on the new【B8】______ and grow.
Scientists from Cornell University in Ithaca, New York, led the research. It involved laboratory mice.【B9】______. The mice were then injected with lung cancer cells. The researchers were surprised when the bone marrow cells reached the lungs days before any cancer cells. They found that the bone marrow cells arrived to prepare the lungs for the cancer to spread. Other tests led to similar findings.
【B10】______. They say knowledge of the process could lead to new ways to fight cancer.
Cancers can be caused by genetic or environmental conditions, or a combination.【B11】______. That includes better diet, exercise and no smoking. [br] 【B10】
选项
答案
The researchers believe they would find the same results in humans
解析
转载请注明原文地址:https://www.tihaiku.com/zcyy/2869925.html
相关试题推荐
WhatCausesCancer?Thequestion"Whatcausescancer?"h
WhatCausesCancer?Thequestion"Whatcausescancer?"h
WhatCausesCancer?Thequestion"Whatcausescancer?"h
WhatCausesCancer?Thequestion"Whatcausescancer?"h
Opinionsfromotherscientistsmightgolikethis:"Whyshouldtheywanttoget
Culturereferstothesocialheritageofapeople—thelearnedpatternsfor
Culturereferstothesocialheritageofapeople—thelearnedpatternsfor
Culturereferstothesocialheritageofapeople—thelearnedpatternsfor
Culturereferstothesocialheritageofapeople—thelearnedpatternsfor
Culturereferstothesocialheritageofapeople—thelearnedpatternsfor
随机试题
HomelandSecuritySecretaryJanetNapolitanowarnedthatwejustcan’twin,
Astudyhasbeenconductedonpublicopinionontheuseofanimalsinresear
Manyparentsmaythinkthateachnewsibling(兄弟姐妹)offerstheirchildrenthe
隧道两侧墙面2m高范围内的平均亮度,不宜低于路面平均亮度的()。A:40%
男性,54岁。5年前诊断为肝硬化。昨天因尿少自服利尿剂后出现动作迟缓、反应迟钝。
最常合并肺栓塞的是A.脓毒性流产 B.肾盂肾炎 C.冠状动脉造影术 D.房
下列甲乙关系不属于姻亲关系的是:A.甲是乙的表姐夫 B.甲是乙的岳母 C.甲
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:
我国目前正处于一个从城乡二元经济结构向( )发展阶段迈进的历史转折点上。A.乡
某人收集的资料如下,该资料宜绘制 A.百分比条图 B.散点图 C.直方图
最新回复
(
0
)