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
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
