首页
普通专升本
成人高考
学位英语
在线刷题
最近学习
最近学习课程
最强大脑 · 3天挑战极限记...
副标题副标题副标题副
最强大脑 · 3天挑战极限记...
副标题副标题副标题副
您现在位置:
模拟考场
>
湖北自学考试
>
专业课
>
药理学(一)
>
浏览试题
[单选题]
碱化尿液能够促进弱酸性药物排出体外的机制是( )
A
a 解离多、极性大、不容易进行跨膜转运、经肾小管重吸收少,排出多b 解离多、极性小、容易进行跨膜转运、经肾小管重吸收少,排出多c 解离少、极性大、不容易进行跨膜转运、经肾小管重吸收少,排出多d 解离少、极性小、容易进行跨膜转运、经肾小管重吸收少,排出多
收藏
查看答案
参考答案
试题答案:
A
答案解释:
理解离子障的原理。离子障是指药物在进行简单扩散透过生物膜时不借助载体能够穿透细胞膜,分子量小极性小的药物更容易融入到脂质双分子层并借助浓度差的势能透过生物膜,而离子形式药物因带有比分子形式药物更多的电荷,极性增大,不容易透过生物膜,被限制在生物膜的一侧,即生物膜对于离子形式的药物有屏障的作用称为离子障。弱酸性药物在碱性环境中解离多,呈离子形式,极性增大,不容易透过生物膜,被肾小管重吸收减少,排出增多。
相关题目
首关效应
钙通道阻滞药抗心绞痛的机制在于:( )
糖皮质激素大剂量突击疗法可适用于:( )
抢救急症患者,多采用的给药方式是( )
吗啡致死的主要不良反应是()
可用于治疗青光眼的滴眼药有( )
甘露醇的适应证是:(ABC)
秋水仙碱治疗急性痛风的作用机制是( )
氯丙嗪可使哪种激素的分泌增加()
简述抢救过敏性休克,为什么一般首选肾上腺素?
热门试题
1.
Laziness is a sin, everyone knows that. We hare probably had all lectures 1.____ that laziness is immoral, that it is wasteful, that lazy people will never amount to 2.____ in life. But laziness can be more harmful than the, it is often caused by more complex reasons than simple wishes to avoid work. Some people who appear to be lazy are 3.____ much more serious problems. They may be so distrustful of their fellow workers that they are unable to join in any group task 4.____ ridicule or fear of having their ideas stolen. These people who seem lazy may be paralyzed by a fear of failure. 5.____, laziness can actually be helpful. Some people may look lazy when they are really thinking, planning, contemplating, researching. We should all remember that some great scientific discoveries occurred 6.____ or while someone was "goofing off(闲荡)". Newton wasn't working in the orchard when the apple hit him he devised the theory of7.____. All of us would like to have someone "lazy" build the car or stove we buy, particularly if that laziness were caused by the worker' s 8.____ to check each step of his work to do his job right. sometimes being lazy--that is, taking time off for a rest--is good for the overworked students or executives. Taking a rest can be particularly 9.____ to the athlete who is trying too hard or the doctor who's simply working himself overtime too many evenings at the clinic. So be careful when you're 10.____ to call someone lazy. That person may be thinking, or planning his or her next book.1. A. handing out B. standing out C. pointing out D. bringing out
2.
如果要从一张幻灯片“溶解”到下一张幻灯片,应使用______选项卡进行设置。
3.
以下不属于基础货币特点的是()
4.
30.试论政策研究与政策分析的区别。
5.
中华民国临时政府正式成立是在 ( )
热门试卷
成人高考专升本《政治》模拟试卷
去做题
已有3120做题
2020年湖北成人高考专升本政治模拟试题三
去做题
已有1933做题
成人高考专升本政治考试模拟试题及答案(1)
去做题
已有1717做题
成人高考高起点语文考试高分突破试题及答案四
去做题
已有1148做题
成人高考专升本政治考试模拟试题及答案(2)
去做题
已有1050做题