The importance of the plateau phase of the action potential of myocardial cells is in
A) preventing overstretching of the cells.
B) enhancing the efficiency of oxygen use by the cells.
C) preventing tetanus.
D) preventing fibrillation.
E) regulating Ca2+ availability to the cells.
Correct Answer:
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Q21: The depolarization of the pacemaker action potential
Q23: The action potential in a cardiac contractile
Q25: The medical term for heart attack is
A)
Q26: Autorhythmic cells
A) are also called pacemakers because
Q30: Stretching a myocardial cell
A) only decreases the
Q32: The fibrous skeleton of the heart is
Q34: During the plateau phase of the action
Q37: A typical action potential of a myocardial
Q38: The end of the plateau phase is
Q40: If channels are permeable to
A) Na+ only
B)
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