题目内容
（请给出正确答案）
脑干肿瘤(brain stem tumors)是脑干的常见疾病，约占所有颅内肿瘤的3%，其中最多见的是
A、海绵状血管瘤
B、血管网状细胞瘤
C、转移瘤
D、星形细胞瘤
E、胶质母细胞瘤
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更多“脑干肿瘤（brain stem tumors)是脑干的常见疾病，约占所有颅内肿瘤的3%，其中最多见的是A、海绵状血”相关的问题
A、narrowing of brain stem
B、softening of cerebellum
C、hardening of brain
D、disease of spinal cord
A、protrusion of nerve root
B、softening of spinal cord
C、hardening of brain stem
D、the protrusion of neural cell
The brain stem maintains the essential functions EXCEPT
A．respiration.
B．muscle coordination.
C．memory.
D．heart rate.
According to the passage, stem cells refer to ______.
A．cells that can become brain cells, blood cells or many other kinds of cell.
B．cells that can become what they want to be pretty much any other type of cell.
C．cells that are uncertain to become blood cells or brain cells when they grow up.
D．cells that have not decided when they grow up.
A、most of the inhibitory area in the reticular formation in brain stem.
B、most of the facilitated area in the reticular formation in brain stem/
C、fiber connection between reticular formation with cerebral cortex and corpus striatum.
D、fiber connection between reticular formation and cerebellum.
E、fiber connection between reticular formation and vestibular nuclei.
A、fiber connection between reticular formation with cerebral cortex and corpus striatum.
B、most of the inhibitory area in the reticular formation in brain stem.
C、most of the facilitated area in the reticular formation in brain stem/
D、fiber connection between reticular formation and cerebellum.
E、fiber connection between reticular formation and vestibular nuclei.
A．central nervous system a nd peripheral nervous system
B．brain and peripheral nervous system
C．spinal cord and central nervous system
D．brain and spinal cord
E．spinal nerves and brain stem
Which of the following statements is NOT true according to the passage？
A．Nearly every cell in the human brain has the instructions to make a complete human.
B．It is impossible for a cell in your nose to turn into a kidney.
C．It is possible to turn out healthy replacement tissues with isolated stem cells.
D．There will certainly appear some new kind of cloned animal in the near future.
Frisen is quick to emphasize that his research is basic and that treatments are years off. But the findings so far hint at extraordinary potential. Two years ago he identified neural stem cells in the adult humanbrain. And he's now researching the mechanisms by which these ceils grow into different types of brain cells. Rather than growing brain tissue in a petri dish and implanting it in, say, the forebrain of a Parkinson's patient, doctors might someday stimulate the spontaneous growth of new neural ceils merely by administering a drug. "It sounds like science fiction," Frisen says, "but we can already do it in mice." In 2007 he will publish the results of his recent experiments, lie's isolated a protein in the mouse brain that inhibits the generation of nerve cells. Using other chemicals, he's been able to block the action of this inhibitor, which in turn leads to the production of new brain cells.
Frisen honed his analytical mind at the dinner table in Goteborg, in southwest Sweden. His mother was a mathematics professor and his father was an ophthalmologist. Frisen went to medical school intending to be a brain surgeon or perhaps a psychiatrist, but ended up spending all his free time in the lab. In 1998 he got seed money from a Swedish venture capitalist to set up his own company, NeuroNova, to commercialize his work. A private foundation tried to lure him to Texas, but Swedish businessman Marcus Storch persuaded him to stay by funding a IS-year professorship at Karolinska, covering his salary and the running costs of his 15-person lab. "Jonas Frisen stood out from all candidates by far," says Storch, who*Ic Tobias Foundation sponsors stem-cell research. "He is something of a king in Sweden." Two years ago two more venture capitalists helped the company expand by hiring a CEO and setting up a separate lab.
Since most researchers are interested in stem cells taken from embryos, the practice has attracted considerable controversy in the past few years. Frisen has benefited indirectly from research restrictions in the United States, which have driven funds and brain-power to Singapore, the United Kingdom and Sweden. The Bush Administration currently forbids U. S. -funded work on all but 78 approved stem-cell cultures, many of which are located outside the country. In just one sign of the times, the U. S. -based Juvenile Diabetes Research Foundation recently announced grants totaling $ 20 million for stem cell research--the largest award yet given to the field by a medical charity--to research institutes in Sweden and elsewhere, but not in the United States.
Since Frisen doesn't work with embryonic stem cells, he's unwittingly become a champion of the radical right, which argues that scientists ought to concentrate solely on adult stem cells. He happens to disagree. "It would be overoptimistic or outright stupid." he says. "To really understand adult cells, we need to master how embryonic stem cells work." But what really gets Frisen going is when people ask him when they can expect a drug for Parkinson's and other diseases. "I say
A．weakened.
B．demolished.
C．vitalized.
D．enlivened.
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