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  4. All the components of the conducting system can generate an action potential for the contraction of heart muscle , but the SA node acts as the pacemaker because

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Q. All the components of the conducting system can generate an action potential for the contraction of heart muscle , but the SA node acts as the pacemaker because

Body Fluids and Circulation

Solution:

Correct answer is (c) the SA node has a higher inherent rate of depolarization