When the heart is in fibrillation,
A) the myocardial cells may become damaged from contracting too fast.
B) the myocardial cells deplete their oxygen supply because they are contracting too fast, and the lactic acid produced damages the myocardial cells.
C) effective pumping of the ventricles ceases because the myocardial cells fail to work as a team, and the brain cannot get adequate oxygen.
D) the myocardial cells are contracting together as they should; fibrillation indicates a normal sinus rhythm of 75 beats per minute.
E) there is no contraction of the myocardium.
Correct Answer:
Verified
Q25: The medical term for heart attack is
A)
Q26: Autorhythmic cells
A) are also called pacemakers because
Q27: The end of the plateau phase is
Q28: ECGs
A) provide direct information about the heart
Q29: The importance of the plateau phase of
Q31: The AV node is important because it
A)
Q32: The fibrous skeleton of the heart is
Q33: Myocardial cells can generate action potentials spontaneously
Q34: In the condition known as complete heart
Q35: If channels are permeable to
A) Na⁺ only.
B)
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