Biology
NULL
Medium
Question
“lubb” sound is produced due to ___________________?
A
Opening of inlet valve
B
Closure of inlet valve
✓ Official correct answer
C
Opening of outlet valve
D
Closure of outlet valve
Community credibility
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A
Opening of inlet valve
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B
Closure of inlet valve
No member explanations yet for this option.
C
Opening of outlet valve
No member explanations yet for this option.
D
Closure of outlet valve
No member explanations yet for this option.
Explanation
The 'lubb' heart sound is produced by the closure of the atrioventricular (inlet) valves at the start of ventricular contraction (systole).