[医学类试卷]影响自体活性物质的药物练习试卷4及答案与解析.doc

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1、影响自体活性物质的药物练习试卷 4 及答案与解析1 苯海拉明的药理作用包括:(A)镇静作用(B)局部麻醉作用(C)对抗组胺 H1 受体效应(D)抗胆碱作用(E)止吐作用2 有关 H2 受体阻断药的叙述正确项是:(A)部分对抗组胺引起的血管扩张作用(B)松弛胃肠平滑肌(C)抑制胃酸分泌(D)松弛气管、支气管平滑肌(E)镇静、嗜睡作用3 H1 受体被激动后通过下列途径发挥作用:(A)直接启动效应器产生作用(B)导致细胞内 Ca2+增加,蛋白激酶 C 活化(C)产生三磷酸肌醇与二酰基甘油(D)释放血管内皮松弛因子(EDRF)(E)通过 G-蛋白而激活磷脂酶 C4 镇静、嗜睡作用较强的 H1 受体阻断

2、药是:(A)阿伐斯汀(B)苯海拉明(C)特非那定(D)异丙嗪(E)苯茚胺影响自体活性物质的药物练习试卷 4 答案与解析1 【正确答案】 A,B,C,D,E【知识模块】 影响自体活性物质的药物2 【正确答案】 A,C【知识模块】 影响自体活性物质的药物3 【正确答案】 B,C,D,E【试题解析】 本题考查 H1 受体被激动后的信息传递过程。 H1 受体被激动后可通过 G-蛋白而激活磷脂酶 C(PLC),产生三磷酸肌醇(IP3)与二酰基甘油(DAG),导致细胞内 Ca2+增加,蛋白激酶 C 活化,从而使胃、肠、气管和支气管平滑肌收缩;通过释放血管内皮松弛因子(EDRF)和 PGI2 使小血管扩张,通透性增高。【知识模块】 影响自体活性物质的药物4 【正确答案】 B,D【知识模块】 影响自体活性物质的药物

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