In cardiac muscle, the fast depolarization phase of the action potential is the result of

In cardiac muscle, the fast depolarization phase of the action potential is the result of

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In cardiac muscle, the fast depolarization phase of the action potential is the result of 




a. increased membrane permeability to Na ions
b. increased membrane permeability to K ions
c. decreased membrane permeability to Ca ions
d. decreased membrane permeability to Na ions
e. increased membrane permeability to Cl ions



Answer: A


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