NEET Biology question

The problem of electrical discontinuity caused in the normal heart by the connective tissue separating the atria from the ventricles is solved by

(A)Coordinating electrical activity in the atria with electrical activity in the ventricles by connecting them via the bundle of HisCorrect
(B)Having the AV node that functions only as a secondary (back-up) pacemaker
(C)Having an ectopic pacemaker
(D)Coordinating electrical activity in the atria with electrical activity in the ventricles by connecting them via the vagus nerve

Answer: (A)

Solution

The fibrous skeleton of the heart electrically insulates the atria from the ventricles, so the AV node picks up the atrial impulse and relays it onward through the bundle of His (and then the Purkinje fibres) to bridge this gap and coordinate atrial with ventricular

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Question ID VK-116293