Anewstudysaysonepartofthehumanbrainmaybecomesmallerasth...
問題詳情:
A new study says one part of the human brain may become smaller as the result of a condition known as jet lag. Jet lag results from flying long distances in an airplane. people with jet lag feel extremely tired for several days. They may also have problems in thinking clearly and remembering.
Recently a researcher at the University of Bristol in Britain reported the findings of his jet lag study, which involved twenty women who worked for international airlines. They had served passengers on airplanes for five years. These flight attendants flew across many countries and at least seven time zones. In the study, the flight attendants had different amounts of time to recover from jet lag. Half the women spent five days or fewer in their home areas between long flights. The other half spent more than fourteen days in their home areas.
The researcher took some saliva from the women’s mouths to measure levels of a hormone (荷爾蒙 ) that increases during stress . He tested them to see if they could remember where black spots appeared on a computer screen he took pictures of their brains to measure the size of the brain’s temporal lobes. (腦葉).
It was found that the women who had less time between flights had smaller right temporal lobes. This area of the brain deals with recognizing and remembering what is seen. The same group performed worse and had slower reaction times on the visual memory test. And their saliva samples showed higher levels of stress hormones.
The researcher believes the brain needs at least ten days to recover after a long trip. He says airline workers told him their ability to remember got worse after working on planes for about four years. Other studies have shown that increased feelings of stress can cause a loss of cells in the part of the brain that controls memory.
Scientists say more tests are needed to study the effects of jet lag on the brain. They want to find out if too much jet lag could permanently affect memory.
28.According to the text, jet lag _____.
A. can cause difficulties in speaking
B. can make people feel tired for a few weeks
C. can be only found in flight attendants
D. can be caused by flying over several time zones
29.It can be inferred from the text that ______.
A. the conclusion is refused by many scientists
B. scientists fear that this research is not done properly
C. every scientific conclusion needs the support from many tests
D. the women who were examined in the research were not healthy
30.From the result of the research we can see that _____.
A. the women who have longer rest at home perform better on the test.
B. the women who fly in short time have smaller right temporal lobes
C. the women who have longer flights fail the memory test
D. the women who rest more than 14 days produce more hormones
31.What is the subject discussed in the test?
A. The cause of jet lag.
B. A story of a group of flight attendants.
C. The importance of having enough rest after flights.
D. A research about the effects of jet lag on the brain.
【回答】
DCAD
知識點:科普環保類閱讀
題型:閱讀理解
-
讀下圖,回答3—4題3.水迴圈中A.①環節是水汽輸送,中緯西風是其主要動力B.②環節是降水,主要集中在春、秋季...
問題詳情:讀下圖,回答3—4題3.水迴圈中A.①環節是水汽輸送,中緯西風是其主要動力B.②環節是降水,主要集中在春、秋季節C.③環節是地表徑流,徑流量季節和年際變化大D.④環節蒸發的水汽,大部分被輸送到陸地上空4.關於圖中*、乙、*、丁四處的敘述,正確的是A.*處為向斜山,主要由...
-
簡答題(選做一題)(5分)20.閱讀下面《紅樓夢》選段,依據原著故事情節,回答問題。一句話未了,忽見一個老婆子...
問題詳情:簡答題(選做一題)(5分)20.閱讀下面《紅樓夢》選段,依據原著故事情節,回答問題。一句話未了,忽見一個老婆子忙忙走來,說道:“這是那裡說起!金釧兒姑娘好好的投井死了!”金釧兒因何投井自盡?她死後,王夫人和寶釵對此作何反應?請簡述。21.閱讀下面《歐也妮·葛朗臺》選段,...
-
閱讀下面的文言文,完成1—4題。陳宗禮,字立之。少貧力學,袁甫為*東提點刑獄,宗禮往問學焉。淳祜四年,舉進士。...
問題詳情:閱讀下面的文言文,完成1—4題。陳宗禮,字立之。少貧力學,袁甫為*東提點刑獄,宗禮往問學焉。淳祜四年,舉進士。調邵武*判官,入為國子正,遷太學博士、國子監丞,轉祕書省著作佐郎.入對,言火不循軌①。帝以星變為憂,宗禮曰:“上天示戒,在陛下修德佈政以迴天意。”又曰:“...
-
下列句子中沒有運用擬人修辭手法的一項是( ) A.我們的春雁每天都要去玉米地作一次旅行,但絕不是偷偷摸摸進行的...
問題詳情:下列句子中沒有運用擬人修辭手法的一項是( ) A.我們的春雁每天都要去玉米地作一次旅行,但絕不是偷偷摸摸進行的。B.每次出發前,都有一場高聲而有趣的辯論,而每次返回之前的爭論則更為響亮。C.3月的大雁則不同。儘管它們在冬天的大部分時間裡都可能受到*擊,但...
相關文章
- NewYorkStatehaspassedtheUSA’sfirststatelawbanning(禁止)mo...
- —Shallwegotothesupermarketafterschool?Ineedtobuysometh...
- Iranintoastrangerashepassedby.“Oh,excusemeplease”wasmy...
- Tonyalwaysworksoutdevelopmentschemesfasterthanothers.I...
- Manyofushavebecomesoreliant(依賴的)onoursmartphonesthatweu...
- 閱讀理解。TodayalmosteveryoneknowscomputersandtheInternet.If...
- Itdoesn'tmatterwhenorhowmuchapersonsleeps,buteveryonene...
- Itdoesn'tmatterwhenorhowmuchapersonsleeps,buteveryonene...
- 單項選擇。Mybrotheroftenhelpsmewithmystudy,althoughheisquite...
- Somestudentsprefertolearnbythemselves.Theythinktheycanl...