题干

将枪乌贼巨大轴突置于体内组织液的模拟环境中,下列分析错误的是(  )

A:增大模拟环境中K+浓度,静息电位的绝对值变小

B:增大模拟环境中Na+浓度,达到动作电位峰值所需时间变短

C:减小模拟环境中Na+浓度,动作电位的峰值变小

D:静息时细胞膜对K+通透性变大,静息电位的绝对值不变

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答案(点此获取答案解析)

D

同类题5

Complete the following passage with the words or phrases in the box. Each can be used only once. (将下列单词或词组填入空格。每空格限填一词,每词只能填一次)

A) youngest     B) professional     C) likely     D) grows up      E) won

    Each year, the news magazine Time For Kids selects several young people to serve as TFK kid reporters. These kids are not____ reporters, but they still have to interview some important people.

    Martin, who lives in New York, is a computer buff, plays the piano, and wants to be an airline pilot when he ____. When he got the assignment from TFK to interview Andrew Hsu, he wanted to talk about science. After all, Andrew had just become the____ winner of the Washington State Science and Engineering Fair. The 11-year-old scientist ____ the grand prize for identifying a particular genes that plays an important role in keeping the human body healthy.

F) free      G) meet      H) receive      I) also      J) improving

    Martin soon discovered that being a science whiz is just one of Andrew's achievements. He's ____an athlete who competes in swimming. But the main thing Andrew wanted to tell Martin about was the World Children Organization (WCO). Andrew started this organization along with his brother Patrick. This project is meant to help improve the lives of children.

    Andrew and Patrick believe that____education is the best way they can make a positive difference for children. They know that there are places where a ____education isn't available to kids. To help____that need, Andrew and Patrick had the idea of producing videos about science, math, and languages for children in countries where there aren't enough qualified teachers.