Which of the Following Statements About the Coordination of the Heartbeat

question 35

Multiple Choice

Which of the following statements about the coordination of the heartbeat is FALSE?

• A)Each heartbeat is generated by signals from the nervous system that stimulate the heart's pacemaker cells.
• B)Cardiac muscles are in electrical continuity, which allows for synchronous contraction of the two atria followed by synchronous contraction of the two ventricles.
• C)Under normal conditions, the electrical separation between the atria and ventricles prevents all four chambers from contracting synchronously.
• D)Following activation of the AV node, the action potential is transmitted to the base of the ventricles by a modified set of cardiac muscle fibers.
• E)None of the answer options is false.

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