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somatic stem cell (成体干细胞)
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更多 “名词解释题somatic stem cell (成体干细胞)” 相关考题
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提出造血干细胞(hematopoietic stem cell，HSC)概念的依据是A、造血干细胞是由胚胎干细胞发育而来B、维持体内恒定的血细胞数量C、1961年Till等在小鼠体内发现了造血干细胞D、1979年，体外培养人造血祖细胞成功E、采用天然的细胞标志纯化造血干细胞和发展体外造血干细胞培养技术
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Stem Cell Therapy May Help Repair the HeartAccording to scientists in the USA,stem cell therapy may one day be able to repair the hearts of people with heart failure.Researchers at Pittsburgh University School of Medicine examined 20 patients who had severe heart failure and were going to have surgery.They injected stem cells into the parts of their hearts that were damaged.They then compared their hearts with those of people who had undergone surgery without having the stem cells injected into them(they had also suffered from severe heart failure).The patients who had had the stem cells injected had hearts that were able to pump（用泵抽运） more blood than the others.According to Professor Robert Kormos,one of the researchers,these results could revolutionize heart treatment.Although previous studies had indicated that there might be a benefit,this is the first study that has actually proved that stem cell therapy can help thefailing heart work better．All the patients in this study had hearts that could not pump blood properly.The scientists measured their ejection fraction（射血分数）.This is a measure of heart performance;you measure how much blood is being pumped out by the left ventricle（心室）.Healthy people's ejection fraction is about 55%.These patients had ejection fraction ofunder 35%. They all had by-pass surgery（搭桥手术）performed on them. Some of the patients had stem cells taken from their hip bones and injected into 25-30 sites in the damaged heart muscle.Six months later their ejection fraction rate was 46.1%while those who just had surgery but no stem cell injections averaged 37. 2%.No side effects were reported.Heart failure is a common problem all over the world.In the UK alone about 650, 000 people suffer from heart failure every year. As the number of people suffering from heart failure increases in the world in general these findings are particularly significant.Current treatments relieve the symptoms.This new stem cell therapy actually repairs the damaged muscle in the heart and has the potential of curing the disease. The 20 patients had stem cell injections instead of surgery.A:Right B:Wrong C:Not mentioned
考题
以下关于干细胞的描述哪些是正确的（）。A、干细胞是具有自我复制能力和分化潜能的细胞B、成体干细胞比胚胎干细胞更难制备C、干细胞包括成体干细胞和胚胎干细胞D、所有的干细胞都具有分化的全能性E、成体干细胞可在一定条件下分化为多种细胞
考题
同源重组（homologous recombination）与胚胎干细胞（embryonic stem cell）结合起来，创造了基因打靶技术（gene targeting），并得到基因敲除模型，获得了（）年的诺贝尔奖A、2006B、2007C、2008D、2009
考题
多选题以下关于干细胞的描述哪些是正确的（）。A干细胞是具有自我复制能力和分化潜能的细胞B成体干细胞比胚胎干细胞更难制备C干细胞包括成体干细胞和胚胎干细胞D所有的干细胞都具有分化的全能性E成体干细胞可在一定条件下分化为多种细胞
考题
多选题以下关于成体干细胞的描述正确的是（）A成体干细胞是一种多能干细胞B成体干细胞主要依赖不对称分裂方式来维持干细胞池的数量稳定C成体干细胞具有自我更新能力和多向分化潜能D神经干细胞是一种成体干细胞E成体干细胞增殖分化等能力虽不如胚胎干细胞，但它在临床上也具有广阔的应用前景
考题
单选题同源重组（homologous recombination）与胚胎干细胞（embryonic stem cell）结合起来，创造了基因打靶技术（gene targeting），并得到基因敲除模型，获得了（）年的诺贝尔奖A
2006B
2007C
2008D
2009
考题
名词解释题Embryonic stem cell
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