问题 问答题 简答题

切断家兔双侧迷走神经后对呼吸有何影响?为什么?

答案

参考答案:

切断家兔双侧迷走神经后,家兔呼吸变深变慢,这是因为肺扩张反射对吸气抑制所致。肺扩张反射的感受器位于气管到支气管的平滑肌内,传入神经为迷走神经。吸气时肺扩张牵拉呼吸道,兴奋肺牵张感受器,冲动沿迷走神经的传入纤维到达延髓,在延髓内通过一定的神经联系使吸气切断机制兴奋,切断吸气,转入呼气,使呼吸保持一定深度和频率。当切断家兔双侧迷走神经后,使家兔吸气不能及时转入呼气,出现吸气延长和加深,变为深而慢的呼吸。

阅读理解

The Golden Compass is the first movie based on the Philip Pullman’s bestselling novel, His Dark Materials. It is a work of imagination that tells us about a young girl who travels to the far north to save her best friend. Along the way she meets strange creatures, like witches and so on. Finally , she saves not only her world, but also ours as well.

Lyra is a young girl among scholars in Oxford’s Jordan College. She spends most of her time with her friend Roger, a kitchen boy. Together, they share a life with no worries. However, when Lyra hears a conversation about a very tiny particle(颗粒), she is thrown into a dangerous adventure. This particle is said to unite different worlds, and is feared by many people who want to destroy it. At the same time , children began to disappear without a trace, including Lyra’s good friend, Roger. As Lyra starts this horrible struggle, and begins to search for Roger, she meets strange creatures both big and small, and bad people who are not what they seem to be. Gobblers(饕餮者) that kidnap(绑架)children appear in the most unexpected places. And a magical compass made of gold will answer any question if one is skilled enough to read it. In unbelievable danger, Lyra doesn’t know that she is doomed to win, or to lose, this battle…

With the movie The Lord of the Rings making New Line cinema over a billion dollars, it’s easy to see why they got the rights to Pullman’s His Dark Materials quickly. The books, sold more than nine million copies in the world, have a different idea from the Harry Potter series. Pullman’s imagination may look suitable for children, but it works far better for adults.

小题1:In the film The Golden Compass, Lyra______.

A.is a student in Oxford’s Jordan College

B.is a kitchen boy

C.hears a conversation of Roger’s

D.meets many strange creatures小题2:The film is named The Golden Compass probably because______.

A.the compass is useful enough to help Lyra

B.only skilled people can read the compass

C.the compass which is made of gold can answer any question

D.the compass throughout the whole story is a clue小题3:From the passage we can conclude that______.

A.New Line Cinema won Pullman’s trust through its achievement

B.The Lord of the Rings is also based on one of Pullman’s novels

C.His Dark Materials is similar to the Harry Potter series

D.New Line Cinema made over a billion dollars through the Harry Potter series小题4:Which group of people will like the film The Golden Compass the best according to the passage?

A.Children

B.Junior students

C.Adults

D.Only old people

单项选择题