First cardiac sound (lub) is associated with- | BIOLOGY - CARDIAC CYCLE | SolveeIt | Solveeit

Today, August 19

Question

First cardiac sound (lub) is associated with-

A

Closure of tricuspid and bicuspid valves

B

Opening of tricuspid and bicuspid valves

C

Closure of semilunar valves

D

Opening of semilunar valves

Answer

Closure of tricuspid and bicuspid valves