- | Page
SHARP EKG EXAM QU ESTIONS
AND ANSWERS
Question 1: Pericardium
CORRECT ANSWER: Outermost layer consisting of
fibrous pericardium and serous pericardium
Question 2: Fibrous pericardium
CORRECT ANSWER: Comes in direct contact with
lungs
Question 3: Serous pericardium
CORRECT ANSWER: Inner two-layered fluid-
secreting membrane
Question 4: Myocardium
CORRECT ANSWER: Middle heart layer, responsible
for heart contraction
Question 5: Endocardium
- | Page
CORRECT ANSWER: Inner heart layer, fold of this
tissue forms valves of the heart
Question 6: Myocardial cells
CORRECT ANSWER: Working cells, function is
cardiac muscle contraction
Question 7: Pacemaker cells
CORRECT ANSWER: Found in conduction system of
the heart, generate electrical impulses
Question 8: Automaticity
CORRECT ANSWER: Generate their own electrical
impulses, just pacemaker cells
Question 9: Excitability
CORRECT ANSWER: Respond to impulse, all cardiac
cells
Question 10: Conductivity
- | Page
CORRECT ANSWER: Conduct impulse, all cardiac
cells
Question 11: Contractility
CORRECT ANSWER: Makes heart contraction occur,
specific to myocardial muscle cells
Question 12: Cation
CORRECT ANSWER: Positive charge
Question 13: Anion
CORRECT ANSWER: Negative charge
Question 14: Potassium
CORRECT ANSWER: Inside cells
Question 15: Sodium
CORRECT ANSWER: Outside cells
- | Page
Question 16: Resting cardiac cells
CORRECT ANSWER: More negative ions inside cell
than outside cell
Question 17: Polarized
CORRECT ANSWER: When ions are aligned, resting
state, ECG shows straight line
Question 18: Depolarized
CORRECT ANSWER: Electrical events cause muscle
contraction, potassium begins to leave cell, sodium rushes into cell causing a more positive charge generating muscle contraction
Question 19: Repolarization
CORRECT ANSWER: Cardiac cells begin to recover,
sodium moves out of cells, potassium moves back in causing a more negative charge to create a resting state