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
2024-02-27
20
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] 【B11】
选项
答案
There are estimates that about one-third of cancer deaths could be prevented if people took better care of themselves
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3486190.html
相关试题推荐
Mostpeoplethinkcancerisadiseaseofrichwesterncountries.Nolongeri
Mostpeoplethinkcancerisadiseaseofrichwesterncountries.Nolongeri
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Janehadlearnedtorelyonherselfatanearlyage,andshe____________(鼓励女儿也这样
[originaltext]Americanscientistshavefoundthatsomebirdsaremoreintel
随机试题
HowtoWriteaThesisI.Introductionpart—writin
Itisatouchingscenethateveryparentcanimmediately__________becausetheyh
科学发明scientificinvention
Let’strytofindoutwhygettingfiberfromwholefoodsisimportantfora
关于MRI射频系统中射频线圈的分类,错误的是A.全容积线圈 B.部分容积线圈
扣球是排球技术中的一种( )A.防守技术 B.进攻技术 C.串联技术 D
患者,女性,2岁,颈部淋巴结肿大伴头晕、乏力、纳差2个月。两颌下、颈部、腋窝及腹
氯丙嗪属于A.抗精神失常药 B.全身麻醉药 C.抗癫癎药 D.镇静催眠药
症见喘促短气,言语无力,咳声低弱,自汗畏风,咽喉不利,口干面红,舌质淡红,脉象细
关于动脉粥样硬化的叙述,哪项是错误的? a.肾动脉粥样硬化时肾呈细颗粒状b.
最新回复
(
0
)