BIOS 255: Week 2 - The Cardiovascular System (Heart) Questions and Answers

BIOS 255: Week 2 - The Cardiovascular
System (Heart) Questions and Answers
WhichAofAtheAfollowingAmembranesAareAfoundAinAtheAbodyAcavitiesAandAhaveAparietal
AlayersAthatAlineAtheAcavitiesAandAvisceralAlayersAthatAcoverAtheAorgans?A-

AcorrectAanswers-serousAmembrane

WhichAisAtrueAofAcardiacAmuscleAtissue?A-AcorrectAanswers-
striated,Auninucleated,AintercalatedAdiscs
EpicardiumAcharacteristicsA&AfunctionA-AcorrectAanswers--AoutermostAlayer

-AcomposedAofAelasticAfibersA&AadiposeAtissue

-AproducesApericardialAfluid
MyocardiumAcharacteristicsA&AfunctionA-AcorrectAanswers--AmiddleAlayer

-AcomposedAprimaryAofAcardiacAmuscle

-AgeneratesAforceAtoApumpAblood
EndocardiumAcharacteristicsA&AfunctionA-AcorrectAanswers--AinnermostAlayer

-AregulatesAcontractility
WhichAchamberAofAtheAheartAhasAtheAthickestAmyocardium?A-AcorrectAanswers-
leftAventricle
WhichAvalveAseparatesAtheArightAatriumAandAtheArightAventricle?A-AcorrectAanswers-
tricuspidAvalve
WhichAvalveAseparatesAtheAleftAatriumAandAtheAleftAventricle?A-AcorrectAanswers-
bicuspidA(mitral)Avalve
WhichAvalveAseparatesAtheAheartAfromAtheAvesselAthatAdeliversAbloodAtoAtheAlungsAtoAre
ceiveAoxygen?A-AcorrectAanswers-pulmonaryAvalve
WhichAvalveAseparatesAtheAheartAfromAtheAvesselAthatAdeliversAbloodAtoAtheAentireAbod
y?A-AcorrectAanswers-aorticAvalve
WhichAvalveAisAbetweenAtheArightAventricleAandApulmonaryAtrunk?A-AcorrectAanswers-
pulmonaryAsemilunarAvalve
WhichAvalveAisAbetweenAtheAleftAventricleAandAascendingAaorta?A-AcorrectAanswers-
aorticAsemilunarAvalve
WhatAisAtheAregionAofAtheAthoracicAcavityAwhereAtheAheartAisAlocated?A-
AcorrectAanswers-mediastinum

WhichAtypeAofAcellAjunctionAallowsAcardiacAmuscleAtissueAtoAtransmitAsignalsArapidly?A-
AcorrectAanswers-gapAjunctions

WhichAofAtheAfollowingAareAfunctionsAofAtheApericardium?A-AcorrectAanswers--
ApreventsAtheAheartAfromAbouncingAinAtheAthoracicAcavity.




-ApreventsAtheAheartAfromAoverfillingAwithAblood

-AcreatesAaAnear-frictionlessAenvironmentAthroughAtheAproductionAofAserousAfluid.
WhichAelementsAareArequiredAtoAsustainAaAmuscularAcontraction?A-AcorrectAanswers--
AcalciumA

, -AsodiumA
-ApotassiumA
-AATP
WhatAtermAisAgivenAtoAtheAeventAwherebyAtheAvoltageAofAanAactionApotentialAbeginsAtoAr
eturnAtoAitsArestingApotentialAfromAtheAheightAofAitsApeak?A-AcorrectAanswers-
repolarization
WhatAtermAisAgivenAtoAtheAeventAwherebyAanotherAactionApotentialAcannotAbeApropagat
edAshortlyAafterAanAactionApotential?A-AcorrectAanswers-refractoryAperiod

CardiacA_________AactionApotentialsAwillAhaveAaArapidAdepolarizationAthatAisAmaintain
edAviaAtheApresenceAofAcalcium.A-AcorrectAanswers-contractile

CardiacA_________AactionApotentialsAwillAhaveAbothAaArapidAdepolarizationAandArepola
rizationAwithAnoArefractoryAperiod.A-AcorrectAanswers-autorhythmic
TheA____________AphaseAofAtheAactionApotentialAinAcardiacAmuscleAdelaysArepolarizat
ionAtoAtheArestingAmembraneApotentialAinAorderAtoAlengthenArefractoryAperiod.A-
AcorrectAanswers-plateau

WithoutAaAplateau,AextendingAtheArefractoryAperiod,AcardiacAmuscleAcellsAmightAbeAsti
mulatedAsoAquicklyAthatAtheyAwouldAnotArelax,AleadingAtoAaAsustainedAcontractionAknow
nAasAwhat?A-AcorrectAanswers-tetany
AAdistinct,AextendedAplateauAoccursAinAtheAactionApotentialAinAcardiacAmuscleAcells,Apro
ducingAaArefractoryAperiodAofA______Amilliseconds.A-AcorrectAanswers-250
WhichAofAtheAfollowingAaspectsAofAtheAconductionAsystemAwouldAdirectlyAresultAinAcontr
actionAofAtheAmyocardiumAinAtheAventricularAwalls?A-AcorrectAanswers-purkinjeAfibers
DuringAtheAdepolarizationAphaseAofAcardiacAmuscleA______________.A-
AcorrectAanswers-voltage-gatedAsodiumAchannelsAopen

WhatAareAtheAindividualAionAcontributionsAtoAtheArestingAmembraneApotentialAofAtheAcar
diacApacemakerAcells?A-AcorrectAanswers--
AgreaterAconcentrationAofAsodiumAoutsideAtheAcell




-AgreaterAconcentrationAofApotassiumAinsideAtheAcell

-AcalciumAgradientAwithAmoreAcalciumAoutsideAtheAcell
AssumingAaApatientAisAperfectlyAhealthy,AallAbloodAinAtheArightAatriumAwillAmoveAintoAwhi
chAarea?A-AcorrectAanswers-rightAventricle
WhichAofAtheAfollowingAphrasesAisAtrueAofAarteries?A-AcorrectAanswers-
arteriesAalwaysAtakeAbloodAawayAfromAtheAheart
WhichAstructuresAareApartAofAtheApulmonaryAcircuit?A-AcorrectAanswers--
ApulmonaryAveins

-ApulmonaryAtrunk
-Alungs
-ArightAventricle
WhichAstructuresAareApartAofAtheAsystemicAcircuit?A-AcorrectAanswers--AleftAventricle
-AleftAatrium
-AvenaAcavaA
-Aaorta
OxygenatedAbloodAflowsAfromAtheA___________AtoAtheA_____________AbeforeAbeingA
pumpedAintoAtheAsystemAcirculation.A-AcorrectAanswers-leftAatrium;AleftAventricle
UnidirectionalAflowAinAtheAheartAisAensuredAbecauseAtheAheartAcontainsA_________Atha
tApreventAbackflow.A-AcorrectAanswers-valves