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Irene Gold Boards Part I Physiology Questions and Answers
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Ventricular filling is ____% passive and ____% active Ans- 80% passive 20% active from atrial contraction SA node impulse to AV node is shown as what on an ECG? Ans- P-R interval At the end of diastole the right ventricle contains _______ amount of blood Ans- 150ml S1 = S2 = Ans- AV Valve...

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  • August 2, 2024
  • 44
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • irene gold boards part i physiology questions and

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Irene Gold Boards Part I
Physiology Questions and
Answers


Ventricular filling is ____% passive and ____% active


Ans- 80% passive


20% active from atrial contraction




SA node impulse to AV node is shown as what on an ECG?


Ans- P-R interval




At the end of diastole the right ventricle contains _______ amount of blood


Ans- 150ml

,S1 =


S2 =


Ans- AV Valves - S1


Semilunar - S2




QRS =


Ans- Ventricular depolarization + consequent contraction




Isovolumetric contraction begins at ____ and ends as semilunar valves open


Ans- S1




Isovolumetric Relaxation begins at ____ and ends as the AV valves open


Ans- S2




The highest concentration of blood O2 is found in the


Ans- Cardiac system

,Pulmonary vein and umbilical vein in fetus are the only veins that carry


Ans- Oxygenated blood




Pulmonary artery and umbilical artery in fetus are the only arteries that carry


Ans- Deoxygenated blood




START PAGE 2: ELECTROCARDIOGRAM


P-wave=


Ans- P-wave= atrial depolarization - atrium contracts




P-R Interval


Ans- AV nodal delay




On an ECG isovolumetric contraction is represented by


Ans- R




The AV node sends its impulse through the _______ into _______

, Ans- Bundle of His


Purkinje Fibers




The right Bundle of His is aka


Ans- Moderator Band




How much faster is the Purkinje system than the Av node?


What accounts for this speed increase?


Ans- 150x faster




Faster because increased number of intercalated discs and gap junctions




The first downward or negative projection that is normal on an ECG is the ____

second negative projection is


Ans- Q-wave - 1st


S-wave - 2nd

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