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SHARP EKG EXAM QUESTIONS AND ANSWERS
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SHARP EKG EXAM QUESTIONS AND ANSWERS
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SHARP EKG EXAM QUESTIONS ANDANSWERS
Pericardium - Answer-Outermost layer consisting of fibrous pericardium and serous
pericardium
fibrous pericardium - Answer-Comes in direct contact with lungs
Serous pericardium - Answer-Inner two layered fluid secreting membrane
Myocardium - Answer-Middle heart layer, responsible for heart contraction
Endocardium - Answer-Inner heart layer, fold of this tissue forms valves of the heart
Myocardial cells - Answer-Working cells, function is cardiac muscle contraction
Pacemaker cells - Answer-Found in conduction system of the heart, generate electrical
impulses
Automaticity - Answer-Generate their own electrical impulses , just pacemaker cells
Excitability - Answer-Respond to impulse, all cardiac cells
Conductivity - Answer-Conduct impulse, all cardiac cells
Contractility - Answer-Makes heart contraction occur, specific to myocardial muscle
cells
Cation - Answer-Positive charge
Anion - Answer-Negative charge
Potassium - Answer-Inside cells
Sodium - Answer-Outside cells
Resting cardiac cells - Answer-More negative ions inside cell than outside cell
Polarized - Answer-When ions are aligned, resting state, ecg shows straight line
Depolarized - Answer-Electrical events cause muscle contraction, potassium begins to
leave cell, sodium rushes into cell causing a more positive charge generating muscle
contraction
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