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【单选题】

Two techniques have recently been developed to simplify research and reduce the number of nonhuman primates needed in studies of certain complex hormonal reactions. One technique involves the culturing of primate pituitary (垂体) cells and the cells of certain human tumors. In the other, animal oviduct (输卵管) tissue is transplanted under the skin of laboratory primates. Both culturing techniques complement existing methods of studying intact (完整的) animals. With an in vitro culturing technique, researchers are deciphering how biochemical agents regulate the secretion of prolactin (催乳激素), the pituitary hormone that promotes milk production. The cultured cells survive for as long as a month, and they do not require serum (血清), a commonly used culture ingredient that can influence cellular function and confound study results. One primate pituitary gland may yield enough cells for as many as 72 culture dishes, which otherwise would require as many animals. The other technique allows scientists to monitor cellular differentiation in the reproductive tracts of female monkeys. While falling short of the long-sought goal of developing an in vitro model of the female reproductive system, the next-best alternative was achieved. The method involves transplanting oviduct tissue to an easily accessible site under the skin, where the grafted cells behave exactly as if they were in their normal environment. In about 80 percent of the grafts, blood vessels in surrounding abdominal skin grow into and begin nourishing the oviduct tissue. Otherwise, the tissue is largely isolated, walled off by the surrounding skin. A cyst (囊胞) forms that shrinks and swells in tandem(一前一后的串联) with stages of the menstrual cycle. With about 80 percent of the grafts reestablishing themselves in the new site, a single monkey may bear as many as 20 miniature oviducts that are easily accessible for study. Because samples are removed with a procedure requiring only local anesthesia, scientists can track changes in oviduct cells over short intervals. In contrast, repeated ysis of cellular changes within the oviduct itself would require abdominal surgery every time a sample was taken-a procedure that the animals could not tolerate. Scientists are using the grafting technique to study Chlamydia (衣原体) infections, a leading cause of infertility among women. By infecting oviduct tissues transplanted into the abdominal skin of rhesus (罗猴) monkeys, researchers hope to determine how the bacteria cause pelvic inflammatory disease and lesions (损害) that obstruct the oviduct. Such research could ually lead to the development of antibodies to the infectious agent and a strategy for producing a Chlamydia vaccine. This passage deals primarily with ______.

A.
reproductive organs of nonhuman primates
B.
diseases of the pituitary glands
C.
in vitro studies of pituitary hormones
D.
techniques for studying hormonal reactions
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参考答案:
举一反三

【单选题】下列有关衣原体描述错误的是()

A.
细胞内寄生的微生物
B.
肺炎衣原体和沙眼衣原体是主要的人类致病原
C.
沙眼衣原体是新生儿结膜炎的最常见病原体
D.
感染后可获得终身的免疫
E.
感染后白细胞计数多正常

【单选题】具有感染性的衣原体结构是()。

A.
原体
B.
始体
C.
包涵体
D.
核糖体
E.
噬菌体

【单选题】检查输卵管不孕最有价值的方法是( )

A.
输卵管通液试验
B.
子宫输卵管碘油造影
C.
宫腔镜检查
D.
性交后精子穿透力试验
E.
腹腔镜检查

【单选题】衣原体的特征错误的是().

A.
革兰阴性,圆形或椭圆形体
B.
具有独特的发育周期,类似细菌以二分裂方式繁殖
C.
含有DNA和RNA两种核酸
D.
有核蛋白体,能进行多种代谢
E.
对所有抗生素敏感

【单选题】以下有关衣原体的描述错误的是:

A.
对热不敏感
B.
感染常有Ⅳ型超敏反应的表现
C.
对75%酒精很敏感,半分钟就有效
D.
沙眼常用利福平或氯霉素眼药水治疗
E.
可能与女性不孕有关

【单选题】输卵管解剖学特征正确的是()

A.
全长14~18cm
B.
位于阔韧带上缘内
C.
输卵管分为5部分
D.
峡部在壶腹部外侧
E.
输卵管峡部管腔最窄

【单选题】衣原体的描述下列哪项不正确()

A.
是原核微生物,有细胞壁
B.
惟有原体致病,始体和中间体不致病
C.
衣原体在细胞外生长繁殖
D.
常寄生于人的尿道上皮
E.
衣原体对热敏感,一般消毒剂可将其杀死

【单选题】有关衣原体的描述不正确的是

A.
沙眼衣原体是专性细胞内寄生,自然宿主是人和小鼠
B.
沙眼衣原体含有DNA和RNA两种核酸
C.
沙眼衣原体包涵体中无糖原存在,而肺炎衣原体包涵体有糖原存在
D.
沙眼衣原体对氨基糖苷类抗生素(如链霉素)不敏感
E.
沙眼衣原体主要引起眼结膜炎与泌尿生殖道炎症

【单选题】衣原体与细菌不同点是()。

A.
有细胞壁,可用革兰染色法染色
B.
有核糖体
C.
对多种抗生素敏感
D.
有独特发育周期,以二分裂法增殖
相关题目:
【单选题】下列有关衣原体描述错误的是()
A.
细胞内寄生的微生物
B.
肺炎衣原体和沙眼衣原体是主要的人类致病原
C.
沙眼衣原体是新生儿结膜炎的最常见病原体
D.
感染后可获得终身的免疫
E.
感染后白细胞计数多正常
【单选题】具有感染性的衣原体结构是()。
A.
原体
B.
始体
C.
包涵体
D.
核糖体
E.
噬菌体
【单选题】检查输卵管不孕最有价值的方法是( )
A.
输卵管通液试验
B.
子宫输卵管碘油造影
C.
宫腔镜检查
D.
性交后精子穿透力试验
E.
腹腔镜检查
【单选题】衣原体的特征错误的是().
A.
革兰阴性,圆形或椭圆形体
B.
具有独特的发育周期,类似细菌以二分裂方式繁殖
C.
含有DNA和RNA两种核酸
D.
有核蛋白体,能进行多种代谢
E.
对所有抗生素敏感
【单选题】以下有关衣原体的描述错误的是:
A.
对热不敏感
B.
感染常有Ⅳ型超敏反应的表现
C.
对75%酒精很敏感,半分钟就有效
D.
沙眼常用利福平或氯霉素眼药水治疗
E.
可能与女性不孕有关
【单选题】输卵管解剖学特征正确的是()
A.
全长14~18cm
B.
位于阔韧带上缘内
C.
输卵管分为5部分
D.
峡部在壶腹部外侧
E.
输卵管峡部管腔最窄
【单选题】衣原体的描述下列哪项不正确()
A.
是原核微生物,有细胞壁
B.
惟有原体致病,始体和中间体不致病
C.
衣原体在细胞外生长繁殖
D.
常寄生于人的尿道上皮
E.
衣原体对热敏感,一般消毒剂可将其杀死
【单选题】有关衣原体的描述不正确的是
A.
沙眼衣原体是专性细胞内寄生,自然宿主是人和小鼠
B.
沙眼衣原体含有DNA和RNA两种核酸
C.
沙眼衣原体包涵体中无糖原存在,而肺炎衣原体包涵体有糖原存在
D.
沙眼衣原体对氨基糖苷类抗生素(如链霉素)不敏感
E.
沙眼衣原体主要引起眼结膜炎与泌尿生殖道炎症
【单选题】衣原体与细菌不同点是()。
A.
有细胞壁,可用革兰染色法染色
B.
有核糖体
C.
对多种抗生素敏感
D.
有独特发育周期,以二分裂法增殖
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