Which represents the correct order in which action potentials spread from the atria to the ventricles during a normal heartbeat in the mammalian heart?
A) Atrioventricular node $\rightarrow$ bundle of His $\rightarrow$ Purkinje fibers
B) Atrioventricular node $\rightarrow$ Purkinje fibers $\rightarrow$ bundle of His
C) Purkinje fibers$\rightarrow$ bundle of His $\rightarrow$ atrioventricular node
D) Sinoatrial node $\rightarrow$ Purkinje fibers $\rightarrow$ bundle of His
E) Sinoatrial node$\rightarrow$ ventricular muscle cells $\rightarrow$ Purkinje fibers

Question

Which represents the correct order in which action potentials spread from the atria to the ventricles during a normal heartbeat in the mammalian heart?
A) Atrioventricular node $\rightarrow$  bundle of His $\rightarrow$  Purkinje fibers
B) Atrioventricular node $\rightarrow$  Purkinje fibers $\rightarrow$  bundle of His
C) Purkinje fibers$\rightarrow$  bundle of His $\rightarrow$  atrioventricular node
D) Sinoatrial node $\rightarrow$  Purkinje fibers $\rightarrow$  bundle of His
E) Sinoatrial node$\rightarrow$  ventricular muscle cells $\rightarrow$  Purkinje fibers

Quizplus · Accepted Answer

The correct sequence for the spread of action potentials during a normal heartbeat is from the atrioventricular node to the bundle of His, and then to the Purkinje fibers. This pathway ensures the coordinated contraction of the heart chambers.

Which Represents the Correct Order in Which Action Potentials Spread →\rightarrow→

Which Represents the Correct Order in Which Action Potentials Spread $\rightarrow$