Jan '16
9
MCAT Question of the Day | MCAT Course


  • Q:

    Which of the following is true regarding the electrical impulses in the heart?

     

    A

    The atrioventricular (AV) node initiates the heartbeat.

    B

    Purkinje cells in the ventricles control the heart rate.

    C

    The sinoatrial (SA) node is located in the left atrium of the heart.

    D

    By stimulating the vagus nerve, the parasympathetic nervous system can decrease the rate at which electrical impulses are generated.




    Tags: Circulatory System | Nervous System | Suggest a tag
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