题干

 实验探究.

糖尿病是一种常见疾病,糖尿病患者常采取注射胰岛素的方法治疗.但长期注射胰岛素,对患者的身心健康会造成一定伤害.因此有人提出﹣﹣口服胰岛素能治疗糖尿病吗?就这一问题,某科技小组进行了探究.请你帮助该小组完善实验设计方案,并根据方案完成下列问题.

实验设计方案:

步骤

甲鼠

乙鼠

a

将完全相同的甲、乙两只健康小鼠的胰岛破坏

b

定时饲喂全营养饲料,每次喂食前

注射适量的胰岛素

定时饲喂与甲鼠等量的全营养饲料,每次喂食前____ 。

c

重复b步骤几天后,采集两鼠的尿液,检测其葡萄糖含量,分析得出结论

(1)请将实验设计方案中b步骤所缺内容补充完整.

(2)在探究方案中,甲鼠的作用是____ .

(3)假如按照上述实验方案进行实验,最终仅在乙鼠的尿液中检测到了葡萄糖.由此可以得出的结论是____ .

(4)该实验仅用甲、乙两鼠进行实验,是否科学合理,为什么?____ .

(5)糖尿病患者在注射胰岛素的过程中,会感觉到疼痛,痛觉是在____ 形成的.

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同类题2

    阅读下面材料,从每题所给的A、B、C、D四个选项中选出最佳选项。

D

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