Investigatingrespiration*in*ectotherms(crickets)*

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7.L.3B;H.B.2;H.B.3.NGSSDCI:4- ‐LS1.A;5- ‐LS2.B;MS- ‐LS1.A;MS- ‐LS1.C;HS- genisthefinalelectronacceptorintheelectron

pirationisshownhere:C6H12O6 O2à 6CO2 6H2O 36or38ATPchemicalenergy s,cricketsarecold- s–whereasinawarm- ardlessofenvironmentaltemperature.Incold- leofacold- hefaster,andwillusemoreenergywhenwarm.

linsects,cricketshaveathree- heymoltmanytimesasthey

0mlsyringe,safetyglasses,labnotebookandpencil.

reviousKnowledge:(biology):Cold- ‐bloodedorectothermicanimalsversuswarm- ‐bloodedorendothermicanimals.Incold- leofacold- ccidentallyintroducedfromEuropemanyyearsago. esitcrawlupastickortoweling? Howdoesitjump?Whatpartorappendageisusedtojump? Doesanypartofthebodymovewhileatrest?o Whichparts?How? Whatdoyouthinkthemovementsarerelatedto?o reathing?o MovementsoftheAppendagesaroundmouth?o psof3- ebottom.SodalimeMUSTNOTbetouched–byyouorthe

1. UsethesyringetofilltheUshapedtubeabout¼- bles.2. 3. loredwateronthechart.5. uceaboutasmuchCO2asit

rspiracles,locatedontheabdomen.6. ecoloredwatergoesbacktoitsstartingposition- ‐howmuchairdidittake(ml)?This .7. Now,repeatsteps2- ‐6- akealinegraph.PutTIME(min)ontheX- candoabargraphwithroomtempversuscoldtempontheX- urcomparisongroup–itishowyoucan

taonRate.Comparetheclassdatausingat- cketrespirationatroomtemperature.Rate amountconsumedinthe16minutes.Time instructorwillrunat- ‐testtocomparetherates.Thet- onsdon'tlookthesame- ‐- tinctinthebottomorlow- ‐variabilitycase.Why?Becausethereis

relativelylittleoverlapbetweenthetwobell- ifferenceappearsleaststrikingbecausethetwobell- abilityoftheirscores.Thet- - stemperature(10- ‐15C,15- ‐20C,21- ‐25C,25- ‐30C)ReflectionQuestions: hellfish,crabs,snails)havegills. tem,andtheblood(hemolymph)for?o ers)distastefulcompoundsthatprovideadegreeof

termolting,physicalmovements(especiallyinsoft- gandcirculatingheatabsorbedwhilebaskinginthesun). asystemoftubesthatdeliveroxygentocells) ,arewarm- irratesofrespirationstaysthesametoo. mic,orcold- ameasthesurroundingenvironment- creactions(suchasdigestionandbreathing)areslower. toryrateofacold- rdlessofenvironmental/outsidetemperature.

://webcache.googleusercontent.com/search?q mrtn29/APBIO LABS/Cricket Respiration Lab &cd 1&hl en&ct clnk&gl us&client firefox- ona.edu/cricketinfo.htm

- ‐blooded.1. kwillhappentooxygenlevelsasthecricketbreathes?2. WhatwillhappentoCO2levelsasthecricketbreathes?3. trolled?

breathed.CollectclassdataonRate.Rate t- group.Useabargraph.Yourinstructorwillrunat- ‐testtocomparetherates.Thet- hatdoesitmeantosaythatth

Crickets"are"jumping"insects."Males"of" most"cricket"species"make"a"loud" chirpingsoundbyrubbingtheir forewingstogether;theydothisto attract"females."Crickets"chirp .

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