题干

图中,图1表示胰腺分泌活动的调节过程,图2是图1的局部放大图,1~5代表特定的结构或物质,图3是胰岛示意图.请据图回答问题:

(1)当食物进入胃后,扩张胃体,通过反射作用于胰腺,刺激胰腺的外分泌部分泌胰液,该反射的效应器是____ .当神经冲动传导到图2中的突触小体时,引发____ ____ 融合,释放神经递质.

(2)除上述(1)的调节方式外,胰液的分泌还受到小肠黏膜分泌的____ 的调节.

(3)图3中胰岛A细胞和胰岛B细胞分泌的激素能有效地调节血糖浓度,其中胰岛B 细胞分泌的激素的作用是促进组织细胞加速对葡萄糖的____ ,从而使血糖水平降低.

(4)糖尿病有多种类型,其中Ⅰ型糖尿病人体内胰岛素的浓度偏低,Ⅱ型糖尿病人体内胰岛素的浓度正常或偏高,推测Ⅱ型糖尿病的直接原因最可能是细胞膜表面____ 减少或异常.

(5)有人患上了胰腺癌,这与免疫系统的____ 功能下降有关.胰腺细胞癌变的根本原因是胰腺细胞内的____ (基因名称)发生了突变.

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\u4f20\u51fa\u795e\u7ecf\u672b\u68a2\u53ca\u5176\u652f\u914d\u7684\u80f0\u817a\u5916\u5206\u6ccc\u90e8,\u7a81\u89e6\u5c0f\u4f53,\u7a81\u89e6\u524d\u819c,\u4fc3\u80f0\u6db2\u7d20,\u6444\u53d6\u3001\u5229\u7528\u548c\u50a8\u5b58,\u80f0\u5c9b\u7d

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    In France, a man walks on what can only be described as a human-sized hamster wheel. The wheel moves around and around, as the man keeps walking. What is he doing? He is lifting a heavy object to the top of a tower the same way workers moved such objects 800 years ago.

    In the 13th century, workers did not have the 100-meter tall cranes they now use to build tall buildings. So they had to be creative and come up with simple machines to get their work done.

    The man on the large wheel is walking at a reasonable speed. The wheel turns and pulls a rope connected to a pulley(滑轮)at the top of the tower. Another rope tied to the pulley lifts supplies from the ground.

    This is just one way skilled craftsmen arc building a 13th-century castle without using modern tools. Crew have been working on the castle since 1997. It is being built in the Burgundy area of central France. Organizers expect the work to last another 10 to 15 years. That means it will take close to 30 years to finish the project.

    The crew are making progress at about half the speed of the workers from 800 years ago. That is because many of them are accustomed to using modern tools. When the crew use heavy chisels(凿子)and hammers to break rock, as they did hundreds of years ago, they are learning as they go. The goal of the project is to learn more about old building techniques in case they might be of use today.

    Clement Guerard, 44,is a stonemason; he cuts and builds with stone. He has been working on the tower for 17 years. He said one way he is able to work on something like this for so long is by forgetting “some of the pace of modern life", he is able to adapt to working by hand.