Why the av node of a mammalian heart is destroyed, Biology

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The AV node of a mammalian heart is destroyed.

A. A depolarization in a cell in the left atrium will cause a depolarization of a cell in the left ventricle.

B. The contraction of the left ventricle will occur at a different time than the contraction of the right ventricle.

C. The rate of ventricular contractions will be higher than the rate of atrial contractions

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