Lab 10 Blood and the Heart
t t t t BIO202L
t
(Lab 10) Straighter line Anatomy & Physiology II Lab
BIO 202L Blood and the Heart Worksheet 2025
Guaranteed Pass Score
StudenttName:
AccesstCodet(locatedtontthetlidtoftyourtlabtkit):
LabtReporttFormattExpectations
Utilizetcollegetleveltgrammartandtprofessionaltformattingtwhentcompletingtthistworksheet.tSubmissio
nstwithouttpropertformatting,talltrequiredtphotostortsufficienttresponsestwilltbetrejected.tPre-
labtQuestions
1. Researchtthetprocesstofterythropoiesis,tandtexplaintthetroleterythropoietintplaystintthetbody.tThet
processtoftmakingtnewtredtbloodtcells,tknowntasterythropoiesis,toccurstintthetbonetmarrow.Eryth
ropoietintistathormonetsecretedtbytthetkidneystthattpromotestthetproductiontoftredtbloodtcells.tEr
ythropoietintistsecretedttotpromotetredtbloodtcelltproductiontwhentoxygentlevelstdrop,twhichtrais
estoxygentconcentrations.
2. BasedtontyourtresponsettotQuestiont1,tabove,twhytdotyoutthinkterythropoietintistatpopular
“doping”tdrugtfortathletes?
Erythropoietintistatcommont"doping"tsubstancetusedtbytsportsmentbecausetittincreasestoxygentconsum
ptiontbytpromotingtthetcreationtoftredtbloodtcells..
3. HowtwouldtthethemoglobintcontenttdiffertintatpersontlivingtintPhiladelphiat(Elevation:t39tfeet)tcom
paredttotsomeonetlivingtintDenvert(Elevation:t5280tfeet)?tExplaintyourtreasoningtusingtthetinformat
iontyoutprovidedtintQuestiont1.
Attgreatertelevations,toxygentconcentrationstaretlower.tHemoglobintconcentrationtvariestmostlytduet
totvariationstintheighttabovetseatlevel.tDenver'st5280,tfortexample,tistfarthighertthantPhiladelphia,tw
hichtistatlow-lyingtlocationtwithtatlargetairtcolumn,tandtthereforetlowertoxygentconcentrations.
,Lab 10 Blood and the Heart
t t t t t BIO202L
EXPERIMENTt1:tCLASSIFICATIONtOFtBONES
IntroductiontQuestions
1. Intthistexperiment,tyoutwilltinvestigatetthetvalvestutilizedtbytthetheart.tWhattothertorganstortbodytsy
stemstincorporatetvalves?tListtandtdescribetthese,tbeingtsurettotelaboratetonthowttheytaretused.t(
Hint:tYourtresponsetshouldtbet4-6tsentencestlong.)
vasculartstructures.Thetbloodtcantonlytflowtintonetdirectiontduettotthetpassagestandtvalvestintthetbl
oodtarteries.Thetvitaltchannelstthattcarrytbloodtthroughouttthetbodytaretcalledtbloodtvessels.tSpeci
alizedtpassagestandtvalvestaretinstalledtintthesetcomplextcircuits.tThesetvalves,twhichtonlytpermitt
bloodttotflowtintonetdirectiontwithintthetveins,taretessentialtfortcontrollingtbloodtflow.tIntadditionttot
minimizingtbackflowtandtpreservingtthetintegritytoftthetcardiovasculartsystem,tthistunidirectionaltflo
wtguaranteesteffectivetcirculation.tThetvalvestservetastgatekeepers,tallowingtbloodttotbetsenttfromtt
hetheartttotthetbody'sttissuestandtorganstwhiletreplenishingtthethearttwithtdeoxygenatedtblood.tThet
appropriatetoperationtoftthetcardiovasculartsystemtandtgeneraltphysiologicaltwell-
beingtdependtontthistdirectedtregulation.
DatatandtObservations
Inserttyourtobservationstfortthistexperimenttintthettabletbelowtastdetailedtbytthetlabtprocedure.
Tablet1:tExperimentaltObservations
Observationst(withtvalve)tandtmLtH2OtDispla Observationst(withouttvalve)tandtmLtH2OtDispl
ced? aced?
Applyingtpressuretcausestlesstwaterttotbetd greatertdisplacementtoftwater
isplaced.
ResultstandtDiscussion
1. Whatthappenedtwhentyoutpressedtontthetballoontstretchedtovertthetjar?tWhattdoestthistresulttrepr
esent?
Whentatballoontwaststronglytsqueezedtovertatjar,tthetwatertwastforcedtuptthetstraw.tIttofferedtproofto
fthowtthethearttfunctions.
2. Whattstructuretintthistexperimenttmimicstathearttvalve?
Thetsegmenttoftthetballoontthattbroketofftandtlaytovertthetvessel.
3. Howtdidtthetvalvetinfluencetthetexperimentaltresults?tIftpossible,tindicatetthetdifferencet(intmL)tintw
atertdisplacedtwithtthetvalvetversustwithouttthetvalve.tDoestthetvalvetenhancetthetwater
, Lab 10 Blood and the Heart
t t t t t BIO202L
flow,tandtwhy?
Thetvalvetaffectedtthetoutcomestastatresulttoftthetcanningtjar'strisingtpressure.tMoretwatertwastablett
otbetforcedtuptintotthetstrawtbytincreasingtpressure.tWhentthetvalvetwastintitstclosedtposition,ttheret
wastaroundt5tmLtmoretwatertthantwhentittwastopen.tThetvalvetimprovestthetwatertflowtbytraisingtthet
jartpressure..
t t t t BIO202L
t
(Lab 10) Straighter line Anatomy & Physiology II Lab
BIO 202L Blood and the Heart Worksheet 2025
Guaranteed Pass Score
StudenttName:
AccesstCodet(locatedtontthetlidtoftyourtlabtkit):
LabtReporttFormattExpectations
Utilizetcollegetleveltgrammartandtprofessionaltformattingtwhentcompletingtthistworksheet.tSubmissio
nstwithouttpropertformatting,talltrequiredtphotostortsufficienttresponsestwilltbetrejected.tPre-
labtQuestions
1. Researchtthetprocesstofterythropoiesis,tandtexplaintthetroleterythropoietintplaystintthetbody.tThet
processtoftmakingtnewtredtbloodtcells,tknowntasterythropoiesis,toccurstintthetbonetmarrow.Eryth
ropoietintistathormonetsecretedtbytthetkidneystthattpromotestthetproductiontoftredtbloodtcells.tEr
ythropoietintistsecretedttotpromotetredtbloodtcelltproductiontwhentoxygentlevelstdrop,twhichtrais
estoxygentconcentrations.
2. BasedtontyourtresponsettotQuestiont1,tabove,twhytdotyoutthinkterythropoietintistatpopular
“doping”tdrugtfortathletes?
Erythropoietintistatcommont"doping"tsubstancetusedtbytsportsmentbecausetittincreasestoxygentconsum
ptiontbytpromotingtthetcreationtoftredtbloodtcells..
3. HowtwouldtthethemoglobintcontenttdiffertintatpersontlivingtintPhiladelphiat(Elevation:t39tfeet)tcom
paredttotsomeonetlivingtintDenvert(Elevation:t5280tfeet)?tExplaintyourtreasoningtusingtthetinformat
iontyoutprovidedtintQuestiont1.
Attgreatertelevations,toxygentconcentrationstaretlower.tHemoglobintconcentrationtvariestmostlytduet
totvariationstintheighttabovetseatlevel.tDenver'st5280,tfortexample,tistfarthighertthantPhiladelphia,tw
hichtistatlow-lyingtlocationtwithtatlargetairtcolumn,tandtthereforetlowertoxygentconcentrations.
,Lab 10 Blood and the Heart
t t t t t BIO202L
EXPERIMENTt1:tCLASSIFICATIONtOFtBONES
IntroductiontQuestions
1. Intthistexperiment,tyoutwilltinvestigatetthetvalvestutilizedtbytthetheart.tWhattothertorganstortbodytsy
stemstincorporatetvalves?tListtandtdescribetthese,tbeingtsurettotelaboratetonthowttheytaretused.t(
Hint:tYourtresponsetshouldtbet4-6tsentencestlong.)
vasculartstructures.Thetbloodtcantonlytflowtintonetdirectiontduettotthetpassagestandtvalvestintthetbl
oodtarteries.Thetvitaltchannelstthattcarrytbloodtthroughouttthetbodytaretcalledtbloodtvessels.tSpeci
alizedtpassagestandtvalvestaretinstalledtintthesetcomplextcircuits.tThesetvalves,twhichtonlytpermitt
bloodttotflowtintonetdirectiontwithintthetveins,taretessentialtfortcontrollingtbloodtflow.tIntadditionttot
minimizingtbackflowtandtpreservingtthetintegritytoftthetcardiovasculartsystem,tthistunidirectionaltflo
wtguaranteesteffectivetcirculation.tThetvalvestservetastgatekeepers,tallowingtbloodttotbetsenttfromtt
hetheartttotthetbody'sttissuestandtorganstwhiletreplenishingtthethearttwithtdeoxygenatedtblood.tThet
appropriatetoperationtoftthetcardiovasculartsystemtandtgeneraltphysiologicaltwell-
beingtdependtontthistdirectedtregulation.
DatatandtObservations
Inserttyourtobservationstfortthistexperimenttintthettabletbelowtastdetailedtbytthetlabtprocedure.
Tablet1:tExperimentaltObservations
Observationst(withtvalve)tandtmLtH2OtDispla Observationst(withouttvalve)tandtmLtH2OtDispl
ced? aced?
Applyingtpressuretcausestlesstwaterttotbetd greatertdisplacementtoftwater
isplaced.
ResultstandtDiscussion
1. Whatthappenedtwhentyoutpressedtontthetballoontstretchedtovertthetjar?tWhattdoestthistresulttrepr
esent?
Whentatballoontwaststronglytsqueezedtovertatjar,tthetwatertwastforcedtuptthetstraw.tIttofferedtproofto
fthowtthethearttfunctions.
2. Whattstructuretintthistexperimenttmimicstathearttvalve?
Thetsegmenttoftthetballoontthattbroketofftandtlaytovertthetvessel.
3. Howtdidtthetvalvetinfluencetthetexperimentaltresults?tIftpossible,tindicatetthetdifferencet(intmL)tintw
atertdisplacedtwithtthetvalvetversustwithouttthetvalve.tDoestthetvalvetenhancetthetwater
, Lab 10 Blood and the Heart
t t t t t BIO202L
flow,tandtwhy?
Thetvalvetaffectedtthetoutcomestastatresulttoftthetcanningtjar'strisingtpressure.tMoretwatertwastablett
otbetforcedtuptintotthetstrawtbytincreasingtpressure.tWhentthetvalvetwastintitstclosedtposition,ttheret
wastaroundt5tmLtmoretwatertthantwhentittwastopen.tThetvalvetimprovestthetwatertflowtbytraisingtthet
jartpressure..
