B3.3 Homeostasis稳态

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1、B3.3Homeostasis稳态1Thisquestionisaboutkeepingthingsinsidethebodythesame.(a)Whichwordmeansmaintenanceofaconstantinternalenvironment?Putatick(√)inthecorrectbox.[1](b)Whichtwoareexamplesofconditionsinsidethebodythatneedtobekeptconstant?Putticks(√)inthetwoco

2、rrectboxes.[1](c)Whichtwoactivitiesaremostlikelytoaffectthemaintenanceofaconstantinternalenvironment?Putticks(√)inthetwomostcorrectboxes.[2](d)Thefollowingdiagramshowspartsofthehumanbodyinvolvedincontrollingourbodytemperature.Ianputsouthishandtofeeltheh

3、eatfromafire.(i)Addlabelstotheboxes,1,2and3,toidentifythepartsinvolved.Choosefromthislist.effectorprocessingcentrereceptorsynapse[3](ii)Drawanarrowinthecircletoshowthedirectionthenerveimpulsetravels.[1](iii)Ananimalrespondstoastimulus.Whichofthefollowin

4、gmethodscouldbeusedtoinvestigatethis?Putticks(√)intheboxesnexttothethreebestanswers.[3][Total:11]1Thisquestionisaboutkeepingthingsinsidethebodythesame.(a)Nametheprocesswhichmeansmaintenanceofaconstantinternalenvironment..................................

5、..........[1](b)Whichconditionsinsidethebodyneedtobekeptconstant?Putticks(√)intheboxesnexttothethreecorrectanswers.[1](c)Theinternalenvironmentisoftencontrolledbynegativefeedback.Whichtwostatementsdescribenegativefeedback?Putticks(√)intheboxesnexttothet

6、wobestanswers.[2](d)Negativefeedbackmechanismsareinvolvedincontrollingtheamountoflightenteringtheeye.Thediagramshowsnegativefeedbackbetweenthebrainandtheeye.Drawstraightlinestojoineachofthelabels,1,2,3and4,tothecorrectpartofthediagram.[4][Total:8]1Sophi

7、etakespartinanexerciseclass.(a)ChangesinSophie’sbodytemperaturecausehertosweatduringtheexercise.Thechangesaredetectedandprocessed.Completethesentencesdescribinghowthishappens.Choosewordsfromthelist.Somewordsmaybeusedonce,morethanonce,ornotatall.brainhea

8、rtkidneysliverlungsskinChangesinthetemperatureofthebloodaredetectedbytemperaturereceptorsinthe..........................................Changesintheexternaltemperaturearedetectedbytemperaturereceptorsinthe........................