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
68
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] 【B5】
选项
答案
signal
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2869920.html
相关试题推荐
Modernscientistsdividetheprocessofdyingintotwophases--clinicalort
Modernscientistsdividetheprocessofdyingintotwophases--clinicalort
Therearemorethan200scientistsintheinstitute,______(其中只有三人)areworkingt
WhatCausesCancer?Thequestion"Whatcausescancer?"h
WhatCausesCancer?Thequestion"Whatcausescancer?"h
WhatCausesCancer?Thequestion"Whatcausescancer?"h
WhatCausesCancer?Thequestion"Whatcausescancer?"h
WhatCausesCancer?Thequestion"Whatcausescancer?"h
Culturereferstothesocialheritageofapeople—thelearnedpatternsfor
Culturereferstothesocialheritageofapeople—thelearnedpatternsfor
随机试题
[originaltext]W:Goodmorning,class.TodayIthoughtwewouldtalkaboutsomet
Itisnot______thatthissituationwilllastverylong.A、alikeB、thelikeC、li
WhydoesJaneborrowTom’syogabook?[br][originaltext]WTom,Iwaswonderin
Wholelifeispermanentinsuranceprotectionthatprotectsyouforyourwhol
在“白酒”商品上,“飞虎葡萄酒”可以注册为商标使用。()
关于糖尿病的胰岛素治疗,正确的是A、肥胖的糖尿病人较适宜用胰岛素治疗 B、1
五行特性中,何曰“润下”A、火 B、土 C、金 D、水 E、木
A.成形材料 B.增稠剂 C.避光剂 D.防腐剂 E.增塑剂丙二醇可作为
根据《最低工资规定》,最低工资标准每()年至少调整一次。A.1 B.2 C
纳税人购买下列车辆时,需要缴纳车辆购置税的是( )。 A.设有固定装置的非运
最新回复
(
0
)