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NWHSU Physiology I Class 13 Contractility of the Heart Exam Questions and Answers
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NWHSU Physiology I Class 13 Contractility of the Heart Exam Questions and Answers
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NWHSU Physiology I Class 13Contractility of the Heart Exam
Questions and Answers
Sympathetic ii- iiAnswers ii-Norepinephrine iiis iiassociated iiwith iithe
ii(Sympathetic/Parasympathetic) iiNervous iiSystem
Sympathetic ii- iiAnswers ii-Beta ii1 iiReceptors iiare iiassociated iiwith iithe
ii(Sympathetic/Parasympathetic) iiNervous iiSystem
Parasympathetic ii- iiAnswers ii-Acetylcholine iiis iiassociated iiwith iithe
ii(Sympathetic/Parasympathetic) iiNervous iiSystem
Parasympathetic ii- iiAnswers ii-M2 iiReceptors iiare iiassociated iiwith iithe
ii(Sympathetic/Parasympathetic) iiNervous iiSystem
If iithe iisympathetic iinervous iisystem iiacts iion iithe iiheart iithe iirate iiof iidepolarization iiwill
ii*increase*, iiCa2+ iiconductance iiwill ii*increase*, iithe iicontractility iiof iithe iiheart iiwill
ii*increase*, iiand iithe iithreshold iipotential iiwill ii*decrease*. ii- iiAnswers ii-If iithe
iisympathetic iinervous iisystem iiacts iion iithe iiheart iithe iirate iiof iidepolarization iiwill
ii(increase/decrease), iiCa2+ iiconductance iiwill ii(increase/decrease), iithe iicontractility iiof
iithe iiheart iiwill ii(increase/decrease), iiand iithe iithreshold iipotential iiwill
ii(increase/decrease).
Sympathetic ii- iiAnswers ii-Your iiheart iirate iiis iiincreasing iiduring iicardiovascular
iiexercise. iiWhat iinervous iisystem iiis iiprimarily iiacting iion iithe iiheart?
If iithe iisympathetic iinervous iisystem iiacts iion iithe iiheart iithe iithreshold iipotential iiwill
ii*decrease* iiand iiyour iiheart iirate iiwill ii*increase*. ii- iiAnswers ii-If iithe iisympathetic
iinervous iisystem iiacts iion iithe iiheart iithe iithreshold iipotential iiwill ii(increase/decrease)
iiand iiyour iiheart iirate iiwill ii(increase/decrease).
If iithe iiparasympathetic iinervous iisystem iiacts iion iithe iiheart iithe iirate iiof iidepolarization
iiwill ii*decrease*, iiCa2+ iiconductance iiwill ii*decrease*, iithe iicontractility iiof iithe iiheart
iiwill ii*decrease*, iiand iithe iithreshold iipotential iiwill ii*increase*. ii- iiAnswers ii-If iithe
iiparasympathetic iinervous iisystem iiacts iion iithe iiheart iithe iirate iiof iidepolarization iiwill
ii(increase/decrease), iiCa2+ iiconductance iiwill ii(increase/decrease), iithe iicontractility iiof
iithe iiheart iiwill ii(increase/decrease), iiand iithe iithreshold iipotential iiwill
ii(increase/decrease).
If iithe iiparasympathetic iinervous iisystem iiacts iion iithe iiheart iithe iithreshold iipotential
iiwill ii*increase* iiand iiyour iiheart iirate iiwill ii*decrease*. ii- iiAnswers ii-If iithe
, iiparasympathetic iinervous iisystem iiacts iion iithe iiheart iithe iithreshold iipotential iiwill
ii(increase/decrease) iiand iiyour iiheart iirate iiwill ii(increase/decrease).
Heart iirate. iiIf iiheart iirate iiincreases, iicontractility iiincreases. ii- iiAnswers ii-Contractility iiis
iidirectly iirelated iito iiwhat?
Intracellular iicalcium ii- iiAnswers ii-If iiyou iiare iiexperiencing iian iiincrease iiin iiheart iirate
iiand iicontractility, iiit iiis iioccuring iidue iito ii(intra/extra) iicellular iicalcium
NE ii- iiAnswers ii-What iineurotransmitter iiactivates iiBeta ii1 iireceptors?
Beta ii1 iireceptors iiare iicoupled iivia iito ii*G iiProtein* iito ii*Adenylyl iiCyclase*. ii- iiAnswers
ii-Beta ii1 iireceptors iiare iicoupled iivia iito ii________________ iito ii_________________.
In iiBeta ii1 iiReceptors, iiactivation iiof iiAdenylyl iiCyclase ii(through iithe iiG iiprotein) iileads
iito iithe iiproduction iiof ii*cyclic iiadenosine iimonophosphate ii(cAMP)* iiwhich iiactivates
ii*kinase iiprotein*. ii- iiAnswers ii-In iiBeta ii1 iiReceptors, iiactivation iiof iiAdenylyl iiCyclase
ii(through iithe iiG iiprotein) iileads iito iithe iiproduction iiof ii_____________________ iiwhich
iiactivates ii____________________.
*Sympathetic iiNS*. iiIncreased iiinflow iiof iitrigger iiCa2+. ii- iiAnswers ii-What iinervous
iisystem iiphosphorylates iithe iisacrolemmal iiCa2 iichannels? iiWhat iidoes iithis iiresult iiin?
Sympathetic iiNervous iiSystem ii- iiAnswers ii-What iinervous iisystem iiphosphylates
iiphospholamban iiwhich iistimulates iiCa2+ iiATPase ii*resulting iiin iigreater iiuptake iiand
iistorage iiof iiCa2+*.
Increased iiuptake iiand iistorage iiof iiCa2+ iiby iiSR ii- iiAnswers ii-What iiis iithe iiresult iiof iithe
iiPhosphorylation iiof iiPhospholamban?
Sympathetic iiNervous iiSystem ii- iiAnswers ii-What iinervous iisystem iiresults iiin iifaster
iirelaxation?
Sympathetic iiNervous iiSystem ii- iiAnswers ii-What iinervous iisystem iiresults iiin iishorter
iicontraction?
ACh ii- iiAnswers ii-What iineurotransmitter iiis iiassociated iiwith iiM2 iireceptors iiand
iiactivates iian iiinhibitory iiG iiProtein?
Parasympathetic iiNervous iiSystem ii- iiAnswers ii-What iiNervous iiSystem iiis iiassociated
iiwith iia iidecrease iiin iiinward iiCa2+ iicurrent iiduring iiplateau?
Parasympathetic iiNervous iiSystem ii- iiAnswers ii-What iiNervous iiSystem iiis iiassociated
iiwith iian iiincreased iioutward iiK+ iiflow?
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