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
18
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] 【B9】
选项
答案
The researchers killed off bone marrow cells in the animals and replaced them with special new ones
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3486188.html
相关试题推荐
Mostpeoplethinkcancerisadiseaseofrichwesterncountries.Nolongeri
Mostpeoplethinkcancerisadiseaseofrichwesterncountries.Nolongeri
Mostpeoplethinkcancerisadiseaseofrichwesterncountries.Nolongeri
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Manyscientistsaredeeplydedicatedtothedevelopmentofscience,andtheirwr
[originaltext]Americanscientistshavefoundthatsomebirdsaremoreintel
[originaltext]Manhasabigbrain.Hecanthinkandspeak.Scientistsused
随机试题
Apple’slaunchoftheiPadisagambleinmorewaysthanone.Tostartwith,
Inthepopularmind,theInternetistherealizationoftheglobalvillage,
Changesinthewaypeoplelivebringaboutchangesinthejobsthattheydo.
[originaltext]Kidsthesedaysallthetimeareobsessedwithallthosevideo
下列变量是定量变量的有()。A.气温 B.民族 C.上证指数 D.蔬菜价
28岁已婚妇女,停经48天,下腹剧痛2小时。检查腹部移动性浊音(+),妇科检查:
将滴眼剂的黏度适当增大可使药物在眼内停留时间延长,合适的黏度在A.1.0~2.0
2015年,我国规模以上电子信息产业企业个数6.08万家,其中电子信息制造企业1
下列选项中,没有体现教师爱岗敬业做法的是()。A.认真钻研教材.把握重点难点
关于酒剂与酊剂的叙述正确的是A.酊剂药物的浓度有要求 B.酒剂可加入矫味剂使口
最新回复
(
0
)