Classic Quiz
Quiz General knowledge

Quiz Cardiology : Action Potentials

Tommymoran
Tommymoran
2 032 played - 10 yrs ago

Prep for First Cardiology Midterm

 

Hard QUIZ 30 QUESTIONS
hard
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Question 1 / 30

What is the correct pathway for the heart's conducting system?

hard
 
Question 2 / 30

The Sinoatrial (SA) Node is...

medium
 
Question 3 / 30
The following is an action potential representative of what class of cells?

The following is an action potential representative of what class of cells?

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Question 4 / 30

Which phase in the graph below constitutes the "pacemaker potential? "

expert
 
Question 5 / 30

What is the resting potential of an SA Nodal cell?

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Question 6 / 30

The action potential in SA Nodal cells is primarily driven by...

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Question 7 / 30

The slow depolarization apparent in phase 4 is primarily due to. .

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Question 8 / 30

What is the function of T-type Ca++ channels?

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Question 9 / 30

Funny currents persist...

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Question 10 / 30

What primarily causes the repolarization in Phase 3?

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Question 11 / 30

What would be one result of hypokalemia in SA nodal cells?

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Question 12 / 30

What is the intrinsic automaticity of the SA node?

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Question 13 / 30

What type of receptor helps to directly control heart rate?

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Question 14 / 30

ß-adrenergic receptors associate with G-proteins. Upon ligand binding, which subunit will bind to and activate adenylyl cyclase?

expert
 
Question 15 / 30
Activated adenylyl cyclase cleaves ATP in cAMP, resulting in what?

Activated adenylyl cyclase cleaves ATP in cAMP, resulting in what?

expert
 
Question 16 / 30

Cholinergic receptors are associated with a G-protein constituted by the inhibitory alpha-(i)-subunit. Upon decreased cAMP levels, what important kinase activity is deterred?

expert
 
Question 17 / 30

What ß-gamma G-protein subunit interaction may counteract the funny current?

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Question 18 / 30

What is the function of the AV node?

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Question 19 / 30

Which has the faster intrinsic automaticity (rate of cycle)?

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Question 20 / 30

What is the function of the delayed action potential in the AV node, compare to that of a Purkinje Fibre, illustrated below?

expert
 
Question 21 / 30

What characteristic of the AV Node and AV bundle result in the slower generation of action potential compared to Purkinje Fibres?

expert
 
Question 22 / 30

Connexins, intercellular pores, allow the exchange of Na+ ions between cells. What characteristic would you expect of Connexins of the SA and AV nodes compared to Purkinje Fibres?

expert
 
Question 23 / 30

What allows the ventricles to contract as a syncitium?

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Question 24 / 30

What ion exchange predominantly drives depolarization in Purkinje Fibres and myocytes?

hard
 
Question 25 / 30

Connexin 40 is important for?

expert
 
Question 26 / 30

What is atrial fibrillation

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Question 27 / 30

What are possible side-effects of anti-arrhythmic drugs, such as Amiodarone (pacerone)?

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Question 28 / 30

Should medical management with anti-arrhythmic drugs be ineffective, what is an appropriate follow-up procedure?

expert
 
Question 29 / 30

What is sick sinus syndrome?

expert
 
Question 30 / 30

Why is Tbx18 transfection a potentially attractive treatment for Atrial Fibrillation?

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