MCAT Question of the Day
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    Q:

    		 Which of the following physiologic changes would result in a more rapid heart rate?
    		 

    A

    		 decreased SA node activity

    B

    		 decreased AV node activity

    C

    		 going from a walking position to sitting

    D

    		 decreased parasympathetic activity of the vagus nerve



    Circulatory System |
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