Kaiser Permamente ECG Quizes With Complete Solutions
Depolarization - Answer The movement of ions Na+ K+ Ca+ across cell membrane
causing inside of the cell to become more positive; an electrical event which results in a
contraction.
Sodium channels open up and sodium pours in
• The charges reverse • Positive inside• Negative outside
Repolarization - Answer The movement of ions across cell membrane in which the inside
of the cell is is restored to its negative charge.
Sodium channels
close. Potassium
channels open. •Potassium pours out
allows for rapid return of resting state
•Sodium is pumped out of the cell
•Active transport Sodium-potassium pump
Automaticity -Answer- capability of pacemaker cells to spontaneiously initiate an
electrical
impulse, SA Node, AV junction and Purkinje fibers.
Excitability -Answer-capability of muscle cells to respond to outside stimulus
Conductivity -Answer-capability to receive and electrical stimulus and conduct that
impulse to
adjacent cells - all cardiac cells possess this.
Depolarization - Answer The movement of ions Na+ K+ Ca+ across cell membrane
causing inside of the cell to become more positive; an electrical event which results in a
contraction.
Sodium channels open up and sodium pours in
• The charges reverse • Positive inside• Negative outside
Repolarization - Answer The movement of ions across cell membrane in which the inside
of the cell is is restored to its negative charge.
Sodium channels
close. Potassium
channels open. •Potassium pours out
allows for rapid return of resting state
•Sodium is pumped out of the cell
•Active transport Sodium-potassium pump
Automaticity -Answer- capability of pacemaker cells to spontaneiously initiate an
electrical
impulse, SA Node, AV junction and Purkinje fibers.
Excitability -Answer-capability of muscle cells to respond to outside stimulus
Conductivity -Answer-capability to receive and electrical stimulus and conduct that
impulse to
adjacent cells - all cardiac cells possess this.
