大学英语10分钟presentation省名师优质课赛课获奖课件市赛课一等奖课件.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,本资料仅供参考，不能作为科学依据。谢谢,The science of sleep,第1页,1,W,hats your daily rhythm,?,Do you consider yourself a morning person or an evening person?,At what time of day do you feel at your best?,Considering only your own feeling best rhythm,if you were entirely free to plan your day at what time would you get up and go to bed?,第2页,2,We have to sleep because it is essential to maintaining normal levels of cognitive skills,such as speech,memory,innovative and flexible thinking.,Why do we sleep?,第3页,3,What would happen if we didnt sleep?,With continued lack of sufficient sleep,the part of the brain that controls language,menmery,planning and sense of time is severely affected,practically shutting down.,Sleep deprivation not only has a major impact on cognitive functioning,but also on emotional and physical health.Moreover,itll arouse disorders such as sleep apnoea and,the risk of obesity.,第4页,4,What happens when we sleep?,第5页,5,Non-REM,sleep,第6页,6,第7页,7,The first rapid eye movement (REM)period usually begins about 70 to 90 minutes after we fall asleep.,We have around three to five REM episodes a night.,REM sleep,第8页,8,People like to sleep anywhere between 5 and 11 hours,with the average being 7.75 hours.,How much sleep is required?,Species,Average total sleep time per day,Python,巨蟒,18 hrs,Tiger,15.8 hrs,Cat,12.1 hrs,Chimpanzee,黑猩猩,9.7 hrs,Sheep,3.8 hrs,African elephant,3.3 hrs,Giraffe,长颈鹿,1.9 hr,第9页,9,A hard nights sleep,第10页,10,Sleep tips and advice,第11页,11,Thanks for your watching!,第12页,12,