RAJASTHAN PMT Rajasthan - PMT Solved Paper-1999

  • question_answer
    First heart sound is produced during closure of:

    A)  auriculo-ventricular valves

    B)  eustechian valve

    C)  sinus valve

    D)  seminular valves

    Correct Answer: A

    Solution :

    A lubb sound is produced due to closing of A.V, valves which prevent the back flow of blood.


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