Question
Biology Question on Hormones Of Heart, Kidney And Gastrointestinal Tract
The typical 'lub-dub' sounds heard during heartbeat are produced due to
A
Closure of semilunar valves
B
Closure of bicuspid and tricuspid valves
C
Closure of bicuspid and tricuspid valves followed by semilunar valves
D
Opening of bicuspid and tricuspid valves followed by semilunar valves
Answer
Closure of bicuspid and tricuspid valves followed by semilunar valves
Explanation
Solution
The correct answer is Option (C) : Closure of bicuspid and tricuspid valves followed by semilunar valves