Which of the following is NOT true?
A) Cardiac cells can contract without having been depolarized.
B) Cardiac cells must be depolarized before they can contract.
C) Cardiac contraction occurs as a result of phase 0 of the action potential.
D) Cardiac contraction requires the presence of calcium ions.
Correct Answer:
Verified
Q13: The wave or complex that represents ventricular
Q14: The QRS complex represents
A)atrial depolarization.
B)atrial repolarization.
C)ventricular depolarization.
D)ventricular
Q15: Depolarization is a(n)
A)electrical event that should result
Q16: The P wave represents
A)atrial depolarization.
B)atrial repolarization.
C)ventricular depolarization.
D)ventricular
Q17: What electrical event must occur for atrial
Q19: In the action potential,phase 0 is
A)depolarization.
B)plateau.
C)rapid repolarization.
D)rest.
Q20: Which of the following correctly describes the
Q21: Which of the following characteristics of heart
Q22: The pacemaker is the _ of the
Q23: A QRS complex with one positive deflection
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