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
16
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] 【B2】
选项
答案
Traditional
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3486181.html
相关试题推荐
Mostpeoplethinkcancerisadiseaseofrichwesterncountries.Nolongeri
Mostpeoplethinkcancerisadiseaseofrichwesterncountries.Nolongeri
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
随机试题
[originaltext]W:WillyoupleasereturnthesebookstoBobwhenyouseehim?M
下列关于飞机库建筑构造的说法中,正确的有()。A.飞机库的外围结构、内部
有限合伙企业中的普通合伙人至少应当有()A.1人 B.2人 C.3
用高级语言编写的源程序转换成目标程序,是通过()来实现的。A.Office程序
两台以上压路机同时作业时,前后间距不得小于(),在坡道上不得纵队行驶。A.0.
华托、布歇、弗拉戈纳尔是法国( )的著名代表画家。A.浪漫主义 B.现实主义
截至2007年上半年末,在所登记的个体企业中户数排在第二位的直辖市是:A.
甲状腺功能亢进症大多伴有()。A.弥漫性甲状腺肿大,双侧对称 B.弥漫性甲状
无差异曲线的特征有( )。[中国人民银行真题]A.无差异曲线凹向原点 B.任
低渗性脱水血清钠小于A、140mmol/L B、150mmol/L C、12
最新回复
(
0
)