Quesions and Answers
Updated 2026
ToMwhatMstructuresMdoMtheMcross-bridgesMattachMduringMmuscleMaction?M-
MAnswerActin
WhichMsubstanceMregulatesMmuscleMactions?M-MAnswerCalcium
WhichMsubstanceMactsMatMtheMneuromuscularMjunctionMtoMexciteMtheMmuscleMfi
bersMofMaMmotorMunit?M-MAnswerAcetylcholine
WhichMmuscleMfiberMtypeMisMtheMMOSTMbeneficialMforMaMmarathonMrunner?M-
MAnswerTypeMI
WhenMthrowingMaMbaseball,ManMathlete'sMarmMisMrapidlyMstretchedMjustMpriorMt
oMthrowingMtheMball.MWhichMofMtheMfollowingMstructuresMdetectsMandMresponds
MtoMthatMstretchMbyMreflexivelyMincreasingMmuscleMactivity?M-
MAnswerMuscleMSpindle
FromMwhatMisMtheMheart'sMelectricalMimpulseMnormallyMinitiated?M-
MAnswerSAMNode
WhichMofMtheMfollowingMoccursMduringMtheMQRSMcomplexMofMaMtypicalMECG?M
-MAnswerrepolarizationMofMtheMatriumMandMdepolarizationMofMtheMventricle.
A-BandM-MAnsweroverlappingMactinMandMmyosin
acetylcholineM-
MAnswerArrivalMofMtheMactionMpotentialMatMtheMnerveMterminalMcausesMrelease
MofMaMneurotransmitter,M______,MwhichMdiffusesMacrossMtheMneuromuscularMjunc
, tion.MOnceMaMsufficientMamountMisMreleased,ManMactionMpotentialMisMgenerated
MacrossMtheMsarcolemma,MandMtheM(muscle)fiberMcontracts.
ActinMandMMyosinM-MAnswercontractileMproteinsMinMmuscle
ActionMpotentialM-
MAnswertheMchangeMinMelectricalMpotentialMassociatedMwithMtheMpassageMofMan
MimpulseMalongMtheMmembraneMofMaMmuscleMcellMorMnerveMcell.
All-or-noneMPrincipleM-
MAnswertheMstrengthMbyMwhichMaMnerveMorMmuscleMfiberMrespondsMtoMaMstim
ulusMisMindependentMofMtheMstrengthMofMtheMstimulus.MIfMtheMstimulusMexceed
sMtheMthresholdMpotential,MtheMnerveMorMmuscleMfiberMwillMgiveMaMcompleteM
response;Motherwise,MthereMisMnoMresponse.
AlveolarMPressureM-
MAnswertheMpressureMinMcentimetersMofMwaterMpressureM(cmH2O)MheldMwithinM
theMalveoliMofMtheMlungsMduringMinspiration.MTheMpressureMvalueMisMtheMdiffere
nceMfromMatmosphericMpressure,MwhichMisMconsideredMzeroMwhenMestablishingMt
heMvalue.
AlveoliM-MAnswerwhereMgasesMareMexchangedMinMrespiration.
AorticMValveM-
MAnswerpreventsMbackflowMfromMtheMaortaMintoMtheMventriclesMduringMventricul
arMrelaxationM(diastole)
ArterialMSystemM-MAnswerCarriesMbloodMawayMfromMtheMheart
ArterioleM-
MAnswersmallMbranchesMofMarteriesMthatMactMasMcontrolMvesselsMthroughMwhich
MbloodMentersMtheMcapillaries.PlayMaMmajorMroleMinMtheMregulationMofMbloodMf
lowMtoMtheMextremeities.