H1受体在心房上的效应包括（） A.收缩减弱，传导减慢 B.收缩增

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问题单项选择题 A1/A2型题

H₁受体在心房上的效应包括（）

A.收缩减弱，传导减慢

B.收缩增强，传导加速

C.收缩减弱，传导加速

D.收缩增强，传导减慢

E.收缩不变，传导减慢

答案

参考答案：D

解析：H受体在心房上可使房室结传导减慢，而在窦房结则可使心率加快。

填空题

把下面短文中的I都换成Tony，注意动词和其他部分的变化。

On weekdays I get up at six o'clock. I have breakfast and go to work. I like to ride my bike. I like

music so I often buy CDs. I usually send friends cards for birthday.

I come back at five. I have dinner and watch TV.

I usually go to concerts but I don't go to the cinema on Sunday.

On weekdays Tony __1__ up at six o'clock. Tony __2__ breakfast and __3__ to work. Tony

__4__ to ride __5__ bike. Tony __6__ music so Tony often __7__ CDs. Tony usually __8__ friends

cards for birthday.

Tony __9__ back at five. Tony __10__ dinner and watches TV.

Tony usually __11__ to concerts but Tony __12__ go to the cinema on Sunday.

填空题

汽车制动时的地面制动力首先取决于（）。