Zoology‘Lub’ sound is produced during

‘Lub’ sound is produced during

  1. A

    joint diastole

  2. B

    atrial systole

  3. C

    ventricular systole

  4. D

    ventricular diastole

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    Solution:

    The first heart sound (lub) is associated with the closure of the atrioventricular (tricuspid and bicuspid) valves at the beginning of ventricular systole.

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