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
34
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] 【B8】
选项
答案
organ
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3486187.html
相关试题推荐
Mostpeoplethinkcancerisadiseaseofrichwesterncountries.Nolongeri
Mostpeoplethinkcancerisadiseaseofrichwesterncountries.Nolongeri
Cancer____________(仅次于心脏病)asacauseofdeath.issecondonlytoheartdisease
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
Aninternationalteamofscientistsisstudyingtheproblemofpollutionan
[originaltext]Manhasabigbrain.Hecanthinkandspeak.Scientistsused
随机试题
Whatisthe______timeoftheflight?A、departmentB、dependenceC、departureD、de
ShoppinghabitsintheUnitedStateshavechangedgreatlyinthelastquarte
某一试验室需要进行AC-20C沥青混合料(70号A级道路石油沥青)目标配合比试验
下列疾病的呼吸困难特点分别是肺气肿A.吸气性呼吸困难 B.呼气性呼吸困难 C
肾上腺素β型受体阻断剂是A.阿托品 B.维拉帕米 C.普萘洛尔 D.
诊断阳虚证的最主要症状是A、面色淡白 B、口淡不渴 C、大便稀溏 D、无汗
药品所含成分的名称与国家药品标准或者省、自治区、直辖市药品标准规定不符合的是(
普通股股东行使资产收益权时,受到法律和其他方面的条件限制,其中其他方面的限制包括
下列关于具体行政行为效力的说法中,正确的是( )。A.相对人申请行政复议的法律
下列关于一般纳税人与小规模纳税人划分的规定,说法不正确的是( )。A.年应税销
最新回复
(
0
)