问题 单项选择题

下丘脑在人体的稳态中具有重要的调节作用,下列相关叙述错误的是()

A.下丘脑中的渗透压感受器能感受细胞内液渗透压的变化,因而能够调节水和无机盐的平衡

B.当血糖含量降低时,下丘脑的某一区域通过有关神经的作用,使肾上腺和胰岛A细胞分别分泌肾上腺素和胰高血糖素,从而使血糖浓度升高

C.当血糖含量升高时,下丘脑的另一区域通过有关神经的作用,使胰岛B细胞分泌胰岛素,从而使血糖浓度降低

D.如果破坏下丘脑,动物就不再具有维持体温恒定的能力,这说明体温调节中枢在下丘脑

答案

参考答案:A

解析:下丘脑可以作为感受器感知渗透压变化,但不是因为此原因就能调节水和无机盐的平衡,而是下丘脑是水盐调节的神经中枢,故A错误。血糖含量低时,因为胰高血糖素是能够升高血糖的,胰高血糖素是胰岛A细胞分泌的,肾上腺素也能够升高血糖,故B正确。血糖含量高时,胰岛B细胞分泌的胰岛素能够降低血糖,故C正确。如果破坏了下丘脑说明体温调节中枢在此,故D正确。考点:本题考察生命活动调节相关知识,意在考察考生对知识点的理解掌握程度。

阅读理解

Peter is thirteen years old. He is in Grade Two this year. He likes to play soccer and watch soccer games. And he often reads newspapers. He does his best to know when and where there is going to be a soccer game. Now Peter is having lunch. He is listening to the radio, too. He is very happy because there is going to be a nice soccer game on TV at four this afternoon. He wants to watch it very much. But he is going to have English and Chinese classes. He thinks hard and wants to find a way.

“Hello, Mrs. Black,” Peter says to his teacher on the telephone, “Peter is ill in bed. He wants to ask for half a day’s leave ( 请半天假 ).”

“Oh, I’m sorry to hear that.” says Mrs. Black, “But who’s that?”

“It’s my father, Mrs. Black.”

小题1:Peter is a ______.

A.middle school student

B.a father

C.worker

D.teacher小题2:Peter will be in ______ next year.

A.Grade Two

B.Grade Three

C. Grade One

D.school小题3:Peter often reads newspaper because _______.

A.his father wants him to read them

B.he likes to read stories

C.he wants to know something about soccer game

D.he likes to read news小题4:Peter wants to ask for half a day’s leave because _______.

A.his father is ill in bed

B.he wants to watch the soccer game

C.he is ill in bed

D.he doesn’t like English or Chinese classes小题5:Which sentence is NOT right?______

A.Mrs. Black is going to take Peter to see a doctor .

B.Peter isn’t an honest ( 诚实的 ) boy.

C.Peter is a 13-year-old boy.

D.Peter wants to watch TV at four in the afternoon.

判断题