VISIONPHYSIOLOGY-Quiz-COMP2010ClassSite视觉生理学-测试-Comp2010类站点

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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