In a second test, mice were clocked on how long they actively tried to escape a pool of water. Those exposed to night lights stopped struggling and just floated in the water, a sign of “behavioural despair”,10 times as long as the mice that had experienced normal nighttime darkness. All symptoms of depression disappeared within two weeks of the mice returning to a normal lightdark cycle, the researchers report. The scientists also could quash the behavioural symptoms by injecting (注射)the brains of animals with a drug that prohibits the activity of certain molecules linked with human depression. This finding further suggests that light at night may cause something related to depression.
Human studies linking nighttime light and mood disorders are important but can't easily detect molecular underpinnings (分子结构)as animal studies can,says George Brainard of Thomas Jefferson University. The new work, he says, suggests that the change of the biological clock by light at night can be “an extremely powerful force in regulating biology and behaviour”.
1.After being exposed to continuous nighttime light,the mice ________.
A.changed their preferences
B.escaped from the water more eagerly
C.remained active as before
D.showed less interest in their favourites
2.What does the underlined word “quash” in Para. 4 probably mean?
【2016届高考英语二轮复习阅读理解一百四十集选练:(76)】相关文章:
★ 【三维设计】2017届高考英语(江苏专用)二轮复习阅读理解解题技法示范课件:4
★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练:第15组(含解析)
★ 常熟市2014高考英阅读理解语一轮(暑假)训练题(5)及答案
★ 湖南省岳阳市2014高考英语一轮单项选择训练题(15)及答案
★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (65)
★ 2017届高考英语二轮复习书面表达限时测验:1(含解析)
★ 2017高考四川省广安市英语阅读理解一轮系列训练:27(含解析)
★ 重庆市2014高考英语阅读理解一轮(精品)训练题(4)附答案
★ 【人教版】2014届高考英语一轮复习指导考点针对练:选修6 unit1《Art》
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21