下列生理活动可“双向”进行的是( ) A.生长素在胚芽鞘中的极

下列生理活动可双向进行的是(  )

A.生长素在胚芽鞘中的极性运输

B.缩手反射时兴奋在神经元间的传递

C.活细胞内ATPADP的转化

D.草原生态系统中狼和兔间的能量流动

答案

解:A、生长素在胚芽鞘中的极性运输只能从形态学的上端运输到形态学的下端,A错误;

B、兴奋在神经元间的传递是单向的,因为神经递质只能由突触前膜释放作用于突触后膜,B错误;

CATP是直接能源物质,活细胞内ATPADP的转化是双向的,时刻进行,C正确;

D、能量流动生态系统中是单向流动的,D错误.

故选:C

相关题目

 After the landslide, the survivors went outwhat had been left. A. to search 
 After the landslide, the survivors went outwhat had been left. A. to search                B. in search for C. in search of             D. in the search of
According to the art dealer, the painting ______  to go for at least a million
According to the art dealer, the painting ______  to go for at least a million dollars.A. is expected      B. expects        C. expected        D. is expecting
在钢中添加一定比例的铬(Cr)和镍(Ni)可以得到不锈钢,
在钢中添加一定比例的铬(Cr)和镍(Ni)可以得到不锈钢,其中镍的原子序数为28。下列说法不正确的是A.不锈钢是一种合金,因此不属于金属材料B.
--Hey,look where you are going? --Oh,I'm terribly sorry._____
--Hey,look where you are going? --Oh,I'm terribly sorry._____. A. I'm not noticing        B.I wasn't noticing C. I haven't noticing       D.I don't noticing
Guide for Teenagers The teenage years can be tough, and it’s normal to feel s
Guide for Teenagers The teenage years can be tough, and it’s normal to feel sad every now and then. But if these feelings don’t go away or become so intense that you can’t handle them, you ma
Mr. White turned the land behind his house into a chicken farm, which would____h
Mr. White turned the land behind his house into a chicken farm, which would____have been deserted. A. therefore           B. however            C. otherwise       D. anyhow
如图所示,点P到直线l的距离是(     ) A.线段PA的长度 
如图所示,点P到直线l的距离是(     ) A.线段PA的长度          B.线段PB的长度 C.线段PC的长度          D.线段PD的长度
最近,在宣判无罪的法庭上,浙江冤狱事件受害人张高平对
最近,在宣判无罪的法庭上,浙江冤狱事件受害人张高平对法官说,“你们今天是法官和检察官,但你们的子孙不一定是,如果没有法律和制度保障的

最新题目