SHARP ECG CORRECT TEST PAPER QUESTIONS
AND ANSWERS SET A+
✔✔Conductivity - ✔✔Conduct impulse, all cardiac cells
✔✔Contractility - ✔✔Makes heart contraction occur, specific to myocardial muscle cells
✔✔Cation - ✔✔Positive charge
✔✔Anion - ✔✔Negative charge
✔✔Potassium - ✔✔Inside cells
✔✔Sodium - ✔✔Outside cells
✔✔Resting cardiac cells - ✔✔More negative ions inside cell than outside cell
✔✔Polarized - ✔✔When ions are aligned, resting state, ecg shows straight line
✔✔Depolarized - ✔✔Electrical events cause muscle contraction, potassium begins to
leave cell, sodium rushes into cell causing a more positive charge generating muscle
contraction
✔✔Repolarization - ✔✔Cardiac cells begin to recover, sodium moves out of cells,
potassium moves back in causing a more negative charge to create a resting state
✔✔P wave - ✔✔Depolarization of atria in response to SA node triggering, 0.10 sec or
less
✔✔PRI - ✔✔Delay of AV node to allow filling of ventricles, 0.12-0.20
AND ANSWERS SET A+
✔✔Conductivity - ✔✔Conduct impulse, all cardiac cells
✔✔Contractility - ✔✔Makes heart contraction occur, specific to myocardial muscle cells
✔✔Cation - ✔✔Positive charge
✔✔Anion - ✔✔Negative charge
✔✔Potassium - ✔✔Inside cells
✔✔Sodium - ✔✔Outside cells
✔✔Resting cardiac cells - ✔✔More negative ions inside cell than outside cell
✔✔Polarized - ✔✔When ions are aligned, resting state, ecg shows straight line
✔✔Depolarized - ✔✔Electrical events cause muscle contraction, potassium begins to
leave cell, sodium rushes into cell causing a more positive charge generating muscle
contraction
✔✔Repolarization - ✔✔Cardiac cells begin to recover, sodium moves out of cells,
potassium moves back in causing a more negative charge to create a resting state
✔✔P wave - ✔✔Depolarization of atria in response to SA node triggering, 0.10 sec or
less
✔✔PRI - ✔✔Delay of AV node to allow filling of ventricles, 0.12-0.20
