Tardigrade
Tardigrade - CET NEET JEE Exam App
Exams
Login
Signup
Tardigrade
Question
Biology
The first heart sound occurs due to
Question Error Report
Question is incomplete/wrong
Question not belongs to this Chapter
Answer is wrong
Solution is wrong
Answer & Solution is not matching
Spelling mistake
Image missing
Website not working properly
Other (not listed above)
Error description
Thank you for reporting, we will resolve it shortly
Back to Question
Thank you for reporting, we will resolve it shortly
Q. The first heart sound occurs due to
AIIMS
AIIMS 2017
A
opening of semilunar valve
B
closing of semilunar valve
C
onset of auricular systole
D
sudden closure of AV valves
Solution:
The atrioventricular (AV) valve closes due to sharp rise of intraventricular pressure, thus closing of it produces first heart sound 'lub'.