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First heart sound is :-
  • a)
    Lubb sound at the end of systole
  • b)
    Lubb sound at the begining of ventricular systole
  • c)
    'Dup' sound at the end of systole
  • d)
    Dup sound at the begining of ventricular systole
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
First heart sound is :-a)Lubb sound at the end of systoleb)Lubb sound ...
Ans.

The first heart sound, or S1, forms the "lub" of "lub-dub" and is composed of components M1 (mitral valve closure) and T1 (tricuspid valve closure). ... It is caused by the closure of the atrioventricular valves, i.e. tricuspid and mitral (bicuspid), at the beginning of ventricular contraction, or systole.
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First heart sound is :-a)Lubb sound at the end of systoleb)Lubb sound at the begining of ventricular systolec)'Dup' sound at the end of systoled)Dup sound at the begining of ventricular systoleCorrect answer is option 'B'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about First heart sound is :-a)Lubb sound at the end of systoleb)Lubb sound at the begining of ventricular systolec)'Dup' sound at the end of systoled)Dup sound at the begining of ventricular systoleCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for First heart sound is :-a)Lubb sound at the end of systoleb)Lubb sound at the begining of ventricular systolec)'Dup' sound at the end of systoled)Dup sound at the begining of ventricular systoleCorrect answer is option 'B'. Can you explain this answer?.
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