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Lonestar Pharmacolog

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
show Heart Rate  
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What is Inotropy?   show
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show Speed of Conduction  
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show Increase in the Rate of impulse generation at the SA node.  
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What is Positive Inotropy?   show
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show Slowing conductivity through the AV node.  
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show Decreased contractility (Decreased Stroke Volume)  
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show Decrease in the Rate of impulse generation at the SA node.  
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What is Negative Dromotrope?   show
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show Sodium Influx  
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What influx Causes Slow Potentials?   show
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show Located in two dominant pacemaker cells of the heart, the SA and AV nodes.  
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Where do Calcium Channel Blocker medications take effect?   show
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show Slow Potentials (Since SA rate is faster than the AV node it over-rides the rate)  
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Where are Fast Potentials located?   show
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What is Phase 0 in Fast Potentials?   show
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What is Phase 1 in Fast Potentials?   show
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show Calcium ions (Ca++) enter the cell and cause a plateau (maintaining the positive charge). This delays repolarization -- important for muscle contraction.  
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What is Phase 3 in Fast Potentials?   show
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What is Phase 4 in Fast Potentials?   show
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show Acetycholine  
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What is the Sympathetic/Adrenergic Primary Neurotransmitter?   show
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show Parasympathomimetic Cholinergic Parasympathetic Agoinst  
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show Parasympatholytic Anticholinergic Parasympathetic Antagonist Cholinergic Blocker  
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show Sympathomimetic Adrenergic Sympathetic Agonist Alpha Agonist Beta Agonist  
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show Sympatholytic Antiadrenergic Sympathetic Antagonist Alpha Blocker Beta Blocker  
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Phase 2 of Fast Potentials is called what?   show
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show Because the Ions are all in the "wrong place".  
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Phase 3 of Fast Potentials is called what?   show
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show This means the if the heart were in a dysrhythmia the Relative Refractory Period is the best time to start an action potential to fix the rhythm.  
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show By the slow influx of Ca++ (slow Ca++ channels)  
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Where do Calcium Channel Blockers take effect?   show
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Where do Abnormal heart rhythms arise from?   show
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What are the most common heart dysrhythmias?   show
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show Slow it down.  
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show Atropine  
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What is the heart's dominant pacemaker?   show
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Which myocardial tissue has the ability to create its own electrical impulse (automaticity)?   show
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show More positive ions outside the cell than inside. This is why the cell has a slight negative charge.  
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What is the primary ion inside the cell?   show
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show K+ Potassium  
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show Calcium Ca++  
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