RCES Test Study Questions with All
Correct Answers
Polarized and negatively charged inside
What is the trans-membrane potential when a Purkinje cell is in the resting state? It is _______
and _______.
automaticity, 4
Compared to myocardial cells: SA node cells are prone to a faster_______ because of their
steeper phase_____.
Sodium
What ion rushes across the myocardial cell membrane during phase 0 of the action potential.
Ca slow channels
SA and AV node depolarization (action potential upstroke) come through the________.
Phase 0
What phase shows propagation velocity?
Perkinje fibers
What cardiac tissue has the fastest electrical conduction velocity?
Absolute refractory period
The ERP of ventricular tissue most closely correlates to what type of refractory period?
1-SA node
2-Atrial muscle
3-AV node
, 4-Purkinje tissue
5-Ventricular muscle
6-A wave due to atrial contraction
7- H wave of His depolarization
8-V wave due to ventricular depolarization
Match the following cardiac tissues with the timing of their action potential:
SA nodal tissue, AV nodal tissue, Purkinje tissue, Atrial muscle, Ventricular muscle
women, men
How does gender effect the frequency of SVT? AVNRT is most common in _____. AVRT is most
common in_______.
QT interval, systole
The plateau phase (phase 2) of the ventricular action potential occurs on the surface ECG
during the ______and during mechanical _________?
Ca enter, K exits
What ionic flow occur across the cardiac muscle cell membrane during the plateau phase (2)
of the action potential?
Ca slowly exits, and K slowly enters
What ionic flows occur across the cardiac muscle cell membrane during the resting phase ( 4)
of the action potential?
SA and AV node
Which two cardiac tissues have a slow phase 0 action potential and thus a slow conduction
velocity?
Require higher mA but creates a weaker contraction
What is the response of cardiac tissues paced during the relative refractory period?
Compared to fully repolarized cells, stimulation in the RRP________.
Correct Answers
Polarized and negatively charged inside
What is the trans-membrane potential when a Purkinje cell is in the resting state? It is _______
and _______.
automaticity, 4
Compared to myocardial cells: SA node cells are prone to a faster_______ because of their
steeper phase_____.
Sodium
What ion rushes across the myocardial cell membrane during phase 0 of the action potential.
Ca slow channels
SA and AV node depolarization (action potential upstroke) come through the________.
Phase 0
What phase shows propagation velocity?
Perkinje fibers
What cardiac tissue has the fastest electrical conduction velocity?
Absolute refractory period
The ERP of ventricular tissue most closely correlates to what type of refractory period?
1-SA node
2-Atrial muscle
3-AV node
, 4-Purkinje tissue
5-Ventricular muscle
6-A wave due to atrial contraction
7- H wave of His depolarization
8-V wave due to ventricular depolarization
Match the following cardiac tissues with the timing of their action potential:
SA nodal tissue, AV nodal tissue, Purkinje tissue, Atrial muscle, Ventricular muscle
women, men
How does gender effect the frequency of SVT? AVNRT is most common in _____. AVRT is most
common in_______.
QT interval, systole
The plateau phase (phase 2) of the ventricular action potential occurs on the surface ECG
during the ______and during mechanical _________?
Ca enter, K exits
What ionic flow occur across the cardiac muscle cell membrane during the plateau phase (2)
of the action potential?
Ca slowly exits, and K slowly enters
What ionic flows occur across the cardiac muscle cell membrane during the resting phase ( 4)
of the action potential?
SA and AV node
Which two cardiac tissues have a slow phase 0 action potential and thus a slow conduction
velocity?
Require higher mA but creates a weaker contraction
What is the response of cardiac tissues paced during the relative refractory period?
Compared to fully repolarized cells, stimulation in the RRP________.
