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26 Cards in this Set
- Front
- Back
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P wave
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spread of electrical activity over atrium
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QRS wave
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spread of electrical activity over ventricle myocardium
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T wave
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repolarization, as the ventricle prepares to fire again
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sinus venosus
[refer to frog video demonstration] |
frog's pacemaker
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SA node
[refer to frog video demonstration] |
human pacemaker
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atrial contraction
[refer to frog video demonstration] |
1st peak, smaller peak
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ventricular contraction
[refer to frog video demonstration |
2nd peak, larger peak
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atrioventricular groove
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space between atria and ventricles
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What neurotransmitter does the parasympathetic system use?
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Acetylcholine
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What neurotransmitter does the sympathetic system use?
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Epinephrine
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What occurs during a heart block?
[refer to frog demonstration video] |
The electrical impulse cannot get from the atria to the ventricle.
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ligature
[refer to frog demonstration video] |
hread used to tie around a vessel (as to constrict the flow of blood)
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What effect did the following have on the frog's heart?
Cold temperature |
Heart beats slower
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What effect did the following have on the frog's heart?
Warm temperature |
Heart beats faster
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What effect did the following have on the frog's heart?
Acetylcholine |
Slowed heart down too much; put heart into cardiac arrest
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What effect did the following have on the frog's heart?
Epinephrine |
Heart speeds up
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Why does a frog's heart continue to beat even though it is cut out of its body?
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Due to the sinus venosus
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What effect did the following have on the frog's heart?
Zapped with electricity |
Heart will drain out and contract again
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What was used to produce a heart block in the frog's heart?
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Ligature
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What effect did the following have on the frog's heart?
Heart block |
No ventricular contraction
There is only one peak (atrial contraction). |
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What causes the first sound of the "lubb-dupp"?
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Snapping shut of AV valves
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What causes the second sound of the "lubb-dupp"?
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Closing of semilunar valves
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What formula is used to calculate heart rate from an EKG?
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#1
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P wave
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#2
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QRS Complex
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#4
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T wave
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