TPO55听力Lecture2原文+MP3+题目+答案下载

TPO55听力Lecture2原文+MP3+题目+答案下载

TPO55听力Lecture2原文：

to part of a lecture in a health science class.

We've all heard that there are health benefits to regular exercise.It's hard even to know where to begin.Increased strength, a sense of well-being, weight maintenance, a healthy heart and cardiovascular system...Need I go on?

Now we're hearing that exercise also has a positive effect on our high-level intellectual abilities.

There are a few hypotheses that may explain how exercise affects our brain. But before we get into that I need to talk a little bit about neurogenesis.Neurogenesis is the creation of new neurons, nerve cells in the brain.

Now, maybe you’ve heard that the human brain doesn’t generate new neurons after fetal development, that the neurons you have when you are bom are all you’ll ever have, unlike what’s true of cells in most tissues, which are generated and replaced throughout life.

But some decades ago, research on the ability of adult songbirds to learn new songs changed that whole paradigm.The research showed that in adulthood, the songbirds, brains created new neurons and that these new cells helped them remember how to sing new songs.These findings on songbirds open up the question of whether the same processes that occur in birds also occur in humans. And subsequent research confirmed that the adult human brain indeed generates new neurons in the memory center of the brain.

But how exactly does exercise fit in here?..........此处省略800字

TPO55听力Lecture2题目：

1.What is the main purpose of the lecture?

A.To compare the effects of different types of exercise on learning.

B.To analyze the relationship between exercise and cardiovascular health.

C.To discuss research suggesting that exercise promotes cognitive function.

D.To elaborate on the importance of vigorous exercise in stress management.

2.What did researchers decide to investigate as a result of the research onsongbirds?

A.Whether new neurons could develop in the adult human brain.

B.Which cognitive processes played the biggest role in increasing songbirds’ abilityto learn new songs.

C.Which brain chemicals were involved in neurogenesis in songbirds.

D.What role exposure to music plays in human brain development.

3.What is the professor’s opinion about the research findings on rats that wereadministrated BDNF?

A.The findings should be used with caution when making claims about the role ofBDNF in human fetal development.

B. The findings suggest that BDNF may play a role in the development of neurons in humans.

C.The findings indicate that BDNF probably hindered rats’ ability to generate newneurons.

D.The findings show that BDNF probably did not help rats remember how toperform certain tasks.

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