Which of the Following Is the Normal Sequence of Signal

question 33

Multiple Choice

Which of the following is the normal sequence of signal conduction in the human heart?

• A)neural and chemical messengers → SA node → atria → AV node → ventricles
• B)neural but not chemical messengers → AV node → ventricles → SA node → atria
• C)chemical but not neural messengers → atria → SA node → ventricles → AV node
• D)neural and chemical messengers → ventricles → SA node → atria → AV node
• E)neural and chemical messengers →AV node → atria → SA node → ventricles

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