题干

下列关于高等动物神经调节和体液调节的叙述,正确的是

A:寒冷环境中肾上腺素分泌量增加,将引起骨骼肌不自主战粟

B:刺激大脑皮层中央前回的底部,可以引起上肢的运动

C:垂体通过下丘脑分泌的相关激素调控甲状腺、性腺等内分泌腺的活动

D:神经元受刺激产生的兴奋,沿轴突传递给下一个细胞只能是单向的

上一题 下一题 0.0难度 选择题 更新时间:2016-06-23 03:51:12

答案(点此获取答案解析)

D

同类题2

阅读理解

    City people usually think they are a lot smarter than country people. They often laugh at simple country ways. But people do not laugh at country music. It is one of the most popular kinds of music in the United States today.

    Perhaps it is so popular because it is about simple but strong human feelings and events—love, sadness, good times and bad times, it tells real life stories and sounds the way people really talk. As life becomes more and more complicated(复杂的), it is good to hear music about ordinary people.

    Country music, sometimes called country western, comes from two kinds of music. One is the traditional music of the people in the Appalachian Mountains in the eastern United States. The other is traditional cowboy music from the West. The singers usually play the guitars, and in the 1920s they started using electric guitars.

    At first city people said country music was low-class. It was popular mostly in the South. But during World War Ⅱ, thousands of Southerners went to the Northeast and Midwest to work in the factories. They took their music with them. Soldiers from the rest of the country went to army camps in the South. They learned to like country music. Slowly it became popular all over the country.

    Today country music is popular everywhere in the United States and Canada, in small towns and in New York City, among black and white, and among educated and uneducated people. About 1,200 radio stations broadcast country music twenty-four hours a day. People sing it in their languages. The music that started with cowboys and poor farmers is now popular all over the world.