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  3. NEET

NEET AIPMT SOLVED PAPER 2002

  • question_answer
                    Impulse of heart beat originates from:                                                                                                  

    A)                 SA node 

    B)                 AV node             

    C)                 vagus nerve    

    D)                 cardiac nerve

    Correct Answer: A

    Solution :

                    SA node (Sino Artial node) is a group of specialized cardiac muscle cells which have the property of generating rhythmic excitatory waves. It is also called pacemaker of the heart as it generates the wave for all the chambers of heart to contract.


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