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ID:41296184
大小:687.00 KB
页数:29页
时间:2019-08-21
《VISIONPHYSIOLOGY-Quiz-COMP2010ClassSite视觉生理学-测试-Comp2010类站点》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、VISIONPHYSIOLOGY-QuizDr.Martin–Lecture14/15Isvisiontheonlyaspectoflightreception?No,alsoskincellsandneurons.DescribeBenoit’sclassicexperiment?Heremovedtheeyesofduckstodemonstratethatonecangetaseasonalresponsetolightifonefocuseslightontheskull,(responsivenesstophotoperiodcontinuedintheabsenceofeyes
2、,butnotiflightwaspreventedfromenteringtheskull).WhatdidLockediscussaboutvisioninhisessay?Heaskedthequestionthatifapersonisbornblindbuthadtheirvisionrestored,couldtheyidentifyaspherejustbylookingatit?Answeris:No.WhatisspecialaboutVirgil(OliverSacks)?Hehadeyedamageatayoungage.Doctorsdidnotwanttooper
3、ateonhiscataractsbecausetheyassumedhecouldnotsee.Hisfiancéwantedtohavetheoperation,theydidanditwasasuccess.Whatistherangeofthevisuallightspectrum?380–760nmDolongorshortwaveshavegreaterenergyandcausemoredamage?ShortwavesWhichcolorhasagreaterwavelengthredorblue?Red(700nm)Doesthefoveacontainconesorro
4、ds?ConesWhatistheareaaroundthefoveawithyellowpigment?MaculaWhatarescotomas?Blindspotsontheretina(novisualreceptors)Whatisthedifferencebetweenscotopticandphotopticvision?Scotoptic–LowlightandinvolvesrodcellsPhotoptic–highlightconditionsandinvolvesconesWhatisthetermfortheconversionoflightenergyinton
5、euralsignalsviaphotoreceptors?TransductionWhatistransducin?G-proteinactivatedbythebreakdownofvisualpigment.TransducinactivatesaphosphodiesterasethatchangescGMPto5’GMP.cGMPisneededtokeepNa+channelsopen.Closureofthesechannelsresultsinhyperpolarizationofthephotoreceptormembrane.Whatisthepointatwhichr
6、aysconvergeandpassthroughasinglepoint?FocalpointWhatisthedistancefromtheconvexlensatwhichtheraysconvergetoapoint?FocallengthIfyoutakethereciprocalofthefocallength,whatdoyouknow?RefractivepowerofthelensWhatistherefractivepowerofthelensatrest?66.7dioptersWhatportionof~67dioptersinvolvescones?43of67c
7、ones,remainderisrodsWheredoestherefractionoflightoccur?CorneaandlensHowcanyouchangetherefractivepowerofthelens?Changingthelensshapeorwithcorrectiveglassorplasticlenses.Whatisthetermformaintainingasharpimageonther
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